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Passage

A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).
When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.
Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).
Q. Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?
  • a)
    H–Se > H–S > H–O
  • b)
    H–S > H–O > H–Se
  • c)
    H–S < H–O < H–Se
  • d)
    H–O < H–S < H–Se
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Directions: Read the passages and choose the best answer to each quest...
The best answer is d. To answer this question, you must look at the bond lengths between the given pairs of elements in Figure 1. The bond lengths for H–O, H–S and H–Se are 96 pm, 134 pm, and 146 pm, respectively. Therefore, the order of their bond lengths in increasing order is H–O < H–S < H–Se, or answer choice d.
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Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactiv e).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Suppose a certain experiment calls for a very stable substance with bond energy greater than 420 kJ/mol.Which of the following pairs of elements in a compound would yield a stable enough substance?

Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactiv e).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following substances would have the highest sum of bond energies (for example, H2O has two H–O bonds) ?

Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactiv e).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Generally speaking, the higher the bond energy, the more stable the bond is. The three most stable bonds shown in Figure 1 are

Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactiv e).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Based on observations from Figures 1 and 2, which of the following statements is the best assessment of the data?

Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: A Short History of HomeopathyHomeopathy is a system for treating physical dis-ease and other ailments using the theory of treating“like with like.” In practice, homeopathic medicineseeks substances that mimic an ailment’s symptoms;(5) this sameness is considered “likeness.” The substanceis then diluted to infinitesimal amounts and admin-istered to the patient in order to cure the problem.Homeopathic treatment is currently in use for every-thing from cancer to colds and flu, though many(10) scientists remain heavily skeptical about its efficacy.Homeopathy was developed in the late 18thcentury by the German medical doctor SamuelHahnemann. Despite being a physician himself,Hahnemann was deeply skeptical of the medical prac-(15) tices of his time. In general, 18th century medicinewas founded on the theory of the four temperaments,or “humors”: Choleric, Melancholic, Sanguine, andPhlegmatic. These temperaments were based on thevarious possible combinations of hot and cold and wet(20) and dry. A choleric, or angry, disposition meant thata person had a constitution that was essentially hotand dry. Phlegmatic, or unemotional, persons werethought to be cold and wet. Melancholy was caused byan excess of cold and dry, whereas Sanguine, or(25) passionate, persons were hot and wet.Humors theory was first developed by theGreek physician Hippocrates, the founder of westernmedicine, and later expanded upon by Galen. When aperson became ill, doctors believed it was because one(30) or more of the humors had come out of balance. Someof the best treatments were thought to be bloodlettingand purgation —the assumption being that these treat-ments would effectively drain off the excess humors.Other popular treatments included blistering plasters(35) and emetics. Often the treatment proved worse thanthe disease. Many patients died from excessive blood-loss or were poisoned by unregulated medications. Inthis environment, Hahnemann’s skepticism was wellwarranted.(40) Hahnemann first stumbled upon his theory whenhe was investigating a common treatment for malaria,cinchona bark. Modern scientists now know thatcinchona bark contains quinine—a substance still usedto treat malaria—but at the time, no one knew why(45) the bark was effective. Hahnemann chose to imple-ment the concept of treating “like with like” by testingan undiluted dose of the bark on himself. Finding thathe had symptoms similar to those of malaria sufferers,Hahnemann concluded that effective drugs must pro-(50) duce symptoms in healthy people that are similar tothose produced by the diseases that the drugs wouldbe expected to treat. Hahnemann further hypothesizedthat, while undiluted substances would only worsensymptoms in the sick, heavily diluted substances could(55) be effective for a cure. The doctor and his colleaguesthen proceeded to test a variety of substances to seewhat symptoms they induced, in the hopes of find-ing cures for diseases with similar symptoms. Perhapsnot surprisingly, Hahnemann’s new field of homeopa-(60) thy (i.e. “similar suffering”) was met with considerableresistance from doctors comfortable with their usualpractices.In fact, Hahnemann’s methodology for scien-tifically testing potential treatments was remarkably(65) modern. Nevertheless, his conclusions remain extraor-dinarily controversial. One of the main points ofcontention involves the standard homeopathic prac-tice of heavy dilution to create the appropriate doseof a substance. Dilution of homeopathic substances(70) happens in stages. Hahnemann had hypothesized thatshaking the solution after each dilution would imprintthe molecular “memory” of the original substance intothe solution, which would allow the diluted dose to beeffective without the possibility of overdose or adverse(75) side effects.Modern scientists have been unable to find anyevidence to support the theory of molecular memory. Infact, the idea that diluting a substance makes it strongerruns against the principles of chemistry and physics.(80) Moreover, scientists point to a lack of standardizedclinical data on homeopathic treatment. Clinical studiesthat do show effectiveness indicate that homeopathiccure rates are generally equal to those of placebos.Today, many conventional medical practitioners(85) generally disregard homeopathy. Homeopathic prac-titioners are frequently termed quacks by conven-tional scientists. Nevertheless, homeopathy remainsextremely popular both in the United States and abroad.In European countries such as France and England,(90) conventional doctors frequently prescribe homeopathictreatments for common illnesses such as colds and flu.Pharmacists who are trained to answer questions aboutthe homeopathic treatments’ use and desired effectsthen fill the prescriptions.Q.According to the fifth paragraph (lines 63–75), Hahnemann hypothesized that heavily diluted substances remained effective because

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Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer?
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Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for ACT. Download more important topics, notes, lectures and mock test series for ACT Exam by signing up for free.
Here you can find the meaning of Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Directions: Read the passages and choose the best answer to each question.PassageA chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through both sharing and exchanging of electrons or electrostatic forces. Bond energy is a measure of bond strength in a chemical bond. For example, the carbon hydrogen (C–H) bond energy is the energy change involved with breaking up the bond between the carbon and hydrogen atoms. Bonds with a higher energy release more energy when they form, and are considered to be more stable (less reactive).When reacting with nonmetals, hydrogen forms covalent bonds, meaning that the bonded atoms share electrons with each other. Figure 1 shows the bond energies and distances for bonds involving hydrogen and nonmetals (H–X). The chart is arranged by period (rows of periodic table); in addition, the values for group 17 (column 17 on the periodic table) are compared.Bond length is the distance between two bonded atoms in a molecule. Bond lengths are measured in molecules by means of X-ray diffraction. A set of two atoms sharing a bond is unique going from one molecule to the next. For example, the oxygen to hydrogen bond in water is different from the oxygen to hydrogen bond in alcohol. It is, however, possible to make generalizations when the general structure is the same. Figure 2 relates bond energy to bond length for H–X bonds between hydrogen and nonmetals. The elements in each period or group are connected by a line (with the exception of the first, which contains only hydrogen).Q.Which of the following is the correct order for increasing bond lengths for bonds between these pairs of elements: H–O, H–S, H–Se?a)H–Se > H–S > H–Ob)H–S > H–O > H–Sec)H–S < H–O < H–Sed)H–O < H–S < H–SeCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice ACT tests.
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