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All questions of Chemical Bonding - Ionic Compounds and Covalent Compounds for Class 10 Exam
Which of the following statements is true about noble gases?- a)They have a high ionization potential
- b)They have a complete outermost shell
- c)They actively participate in chemical reactions
- d)They easily lose electrons
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements is true about noble gases?
a)
They have a high ionization potential
b)
They have a complete outermost shell
c)
They actively participate in chemical reactions
d)
They easily lose electrons
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Learnever Education answered |
Noble gases possess a complete outermost shell, which makes them chemically inert or unreactive. This complete electron configuration contributes to their stability, resulting in very low reactivity with other elements.
How does the electronegativity difference affect the formation of covalent compounds?- a)It should be negligible for covalent bonding
- b)It should be high for covalent bonding
- c)It has no effect on covalent bonding
- d)It only affects ionic compounds
Correct answer is option 'A'. Can you explain this answer?
How does the electronegativity difference affect the formation of covalent compounds?
a)
It should be negligible for covalent bonding
b)
It should be high for covalent bonding
c)
It has no effect on covalent bonding
d)
It only affects ionic compounds
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Learnever Education answered |
For the formation of covalent compounds, the electronegativity difference between the atoms should be negligible. This allows for the mutual sharing of electrons without significant charge separation, resulting in stable covalent bonds.
Which statement accurately describes the electron affinity of a non-metallic atom?- a)It only applies to metals
- b)It is irrelevant in bond formation
- c)It is always low
- d)Higher values facilitate anion formation
Correct answer is option 'D'. Can you explain this answer?
Which statement accurately describes the electron affinity of a non-metallic atom?
a)
It only applies to metals
b)
It is irrelevant in bond formation
c)
It is always low
d)
Higher values facilitate anion formation
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Learnever Education answered |
Higher electron affinity values for non-metallic atoms indicate a greater tendency to gain electrons. This tendency facilitates the formation of anions, which is a critical aspect of ionic bonding and the stability of ionic compounds.
Which of the following best describes the electron transfer in ionic bonding?- a)Electrons remain with their respective atoms
- b)Electrons are transferred from metals to non-metals
- c)Electrons are transferred from non-metals to metals
- d)Electrons are shared equally
Correct answer is option 'B'. Can you explain this answer?
Which of the following best describes the electron transfer in ionic bonding?
a)
Electrons remain with their respective atoms
b)
Electrons are transferred from metals to non-metals
c)
Electrons are transferred from non-metals to metals
d)
Electrons are shared equally
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Learnever Education answered |
In ionic bonding, electrons are transferred from metallic atoms (which have a tendency to lose electrons) to non-metallic atoms (which tend to gain electrons). This transfer creates cations and anions, which are held together by electrostatic forces.
Which of the following is true about the properties of ionic compounds?- a)They have low melting points
- b)They dissolve easily in non-polar solvents
- c)They are good conductors in solid form
- d)They form crystal lattice structures
Correct answer is option 'D'. Can you explain this answer?
Which of the following is true about the properties of ionic compounds?
a)
They have low melting points
b)
They dissolve easily in non-polar solvents
c)
They are good conductors in solid form
d)
They form crystal lattice structures
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Learnever Education answered |
Ionic compounds typically form crystal lattice structures, which contribute to their high melting and boiling points. This structured arrangement is due to the strong electrostatic forces between the oppositely charged ions.
What is the result of a lone pair of electrons in the formation of a coordinate bond?- a)It creates a non-polar bond
- b)It remains unshared between two atoms
- c)It is donated to another atom
- d)It increases the bond strength
Correct answer is option 'C'. Can you explain this answer?
What is the result of a lone pair of electrons in the formation of a coordinate bond?
a)
It creates a non-polar bond
b)
It remains unshared between two atoms
c)
It is donated to another atom
d)
It increases the bond strength
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Learnever Education answered |
In a coordinate bond, a lone pair of electrons from one atom is donated to another atom that lacks sufficient electrons to complete its octet. This donation is crucial for the formation of stable molecules like ammonium (NH4+).
How do non-polar covalent compounds differ from polar covalent compounds?- a)Non-polar compounds do not dissolve in water
- b)Non-polar compounds have higher melting points
- c)Polar compounds are always gases
- d)Polar compounds have equal sharing of electrons
Correct answer is option 'A'. Can you explain this answer?
How do non-polar covalent compounds differ from polar covalent compounds?
a)
Non-polar compounds do not dissolve in water
b)
Non-polar compounds have higher melting points
c)
Polar compounds are always gases
d)
Polar compounds have equal sharing of electrons
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Learnever Education answered |
Non-polar covalent compounds do not mix well with polar solvents like water, meaning they typically do not dissolve in water. This difference is due to the equal sharing of electrons in non-polar compounds, which results in no charge separation.
What does the term "electrovalency" refer to?- a)The number of electrons shared in a covalent bond
- b)The total number of electrons in an atom
- c)The number of electrons donated or accepted to achieve stability
- d)The number of protons in the nucleus of an atom
Correct answer is option 'C'. Can you explain this answer?
What does the term "electrovalency" refer to?
a)
The number of electrons shared in a covalent bond
b)
The total number of electrons in an atom
c)
The number of electrons donated or accepted to achieve stability
d)
The number of protons in the nucleus of an atom
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Learnever Education answered |
Electrovalency refers to the number of electrons that an atom donates or accepts in order to achieve a stable electronic configuration. This concept is essential in understanding ionic bonding and the formation of ionic compounds.
In the formation of sodium chloride (NaCl), what happens to the sodium atom?- a)It shares electrons
- b)It gains electrons
- c)It forms a covalent bond
- d)It loses electrons
Correct answer is option 'D'. Can you explain this answer?
In the formation of sodium chloride (NaCl), what happens to the sodium atom?
a)
It shares electrons
b)
It gains electrons
c)
It forms a covalent bond
d)
It loses electrons
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Learnever Education answered |
In the formation of sodium chloride, the sodium atom loses one electron to achieve a stable electron configuration, resulting in the formation of a positively charged sodium ion (Na+). This electron transfer is a key characteristic of ionic bonding.
What characterizes an electrovalent bond?- a)Sharing of electron pairs
- b)Equal distribution of electrons
- c)Transfer of electrons
- d)Formation of lone pairs
Correct answer is option 'C'. Can you explain this answer?
What characterizes an electrovalent bond?
a)
Sharing of electron pairs
b)
Equal distribution of electrons
c)
Transfer of electrons
d)
Formation of lone pairs
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Learnever Education answered |
An electrovalent bond, also known as an ionic bond, is characterized by the transfer of one or more electrons from a metallic element to a non-metallic element. This transfer creates ions that are held together by electrostatic forces, resulting in the formation of ionic compounds.
Which of the following is an example of a non-polar covalent compound?- a)HCl
- b)CH4
- c)NaCl
- d)NH3
Correct answer is option 'B'. Can you explain this answer?
Which of the following is an example of a non-polar covalent compound?
a)
HCl
b)
CH4
c)
NaCl
d)
NH3
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Learnever Education answered |
Methane (CH4) is an example of a non-polar covalent compound. In methane, the electrons are shared equally between the carbon and hydrogen atoms, resulting in no significant charge separation.
What is the effect of ionization potential on the formation of cations?- a)Ionization potential has no effect on cation formation
- b)Higher ionization potential makes it easier to form cations
- c)Lower ionization potential facilitates cation formation
- d)Ionization potential only affects anions
Correct answer is option 'C'. Can you explain this answer?
What is the effect of ionization potential on the formation of cations?
a)
Ionization potential has no effect on cation formation
b)
Higher ionization potential makes it easier to form cations
c)
Lower ionization potential facilitates cation formation
d)
Ionization potential only affects anions
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Learnever Education answered |
A lower ionization potential makes it easier for a metallic atom to lose electrons and form cations. This is because less energy is required to remove an electron from the atom, enhancing its ability to participate in ionic bonding.
What is the primary condition necessary for the formation of a coordinate bond?- a)The atoms must be from the same element
- b)One atom must have a lone pair of electrons
- c)Both atoms must be non-metallic
- d)Both atoms must have complete outer shells
Correct answer is option 'B'. Can you explain this answer?
What is the primary condition necessary for the formation of a coordinate bond?
a)
The atoms must be from the same element
b)
One atom must have a lone pair of electrons
c)
Both atoms must be non-metallic
d)
Both atoms must have complete outer shells
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Learnever Education answered |
The formation of a coordinate bond requires that one of the two atoms must possess at least one lone pair of electrons. This lone pair is donated to another atom that lacks sufficient electrons to complete its shell, thus forming a coordinate bond.
What is covalency?- a)The number of electrons lost by an atom
- b)The energy required to remove an electron
- c)The total number of neutrons in an atom
- d)The number of electron pairs shared between atoms
Correct answer is option 'D'. Can you explain this answer?
What is covalency?
a)
The number of electrons lost by an atom
b)
The energy required to remove an electron
c)
The total number of neutrons in an atom
d)
The number of electron pairs shared between atoms
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Learnever Education answered |
Covalency refers to the number of electron pairs that an atom shares with other atoms to achieve a stable electronic configuration. It is a key concept in understanding how covalent bonds form between non-metallic elements.
What role does electronegativity play in the formation of ionic bonds?- a)It affects the temperature of the reaction
- b)It influences the transfer of electrons
- c)It dictates the color of the compounds formed
- d)It determines the size of the ions formed
Correct answer is option 'B'. Can you explain this answer?
What role does electronegativity play in the formation of ionic bonds?
a)
It affects the temperature of the reaction
b)
It influences the transfer of electrons
c)
It dictates the color of the compounds formed
d)
It determines the size of the ions formed
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Learnever Education answered |
Electronegativity differences between combining atoms greatly influence the ease of electron transfer in ionic bond formation. A larger difference in electronegativity means that the transfer of electrons from the metallic atom to the non-metallic atom is more favorable.
What is the primary reason for chemical bonding between atoms?- a)To attain a stable electronic configuration
- b)To increase the temperature of the substance
- c)To increase the mass of the molecule
- d)To form gases at room temperature
Correct answer is option 'A'. Can you explain this answer?
What is the primary reason for chemical bonding between atoms?
a)
To attain a stable electronic configuration
b)
To increase the temperature of the substance
c)
To increase the mass of the molecule
d)
To form gases at room temperature
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Learnever Education answered |
Atoms bond primarily to achieve a stable electronic configuration, similar to that of noble gases. This stability is often attained by having a complete outer electron shell, either by gaining, losing, or sharing electrons. This drive for stability is a fundamental concept in chemistry and underpins the formation of various types of chemical bonds.
What is the primary factor that distinguishes polar covalent bonds from non-polar covalent bonds?- a)The number of atoms involved
- b)The type of elements involved
- c)The temperature of the reaction
- d)The difference in electronegativity
Correct answer is option 'D'. Can you explain this answer?
What is the primary factor that distinguishes polar covalent bonds from non-polar covalent bonds?
a)
The number of atoms involved
b)
The type of elements involved
c)
The temperature of the reaction
d)
The difference in electronegativity
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Learnever Education answered |
The key factor that distinguishes polar covalent bonds from non-polar covalent bonds is the difference in electronegativity between the bonded atoms. In polar bonds, the electrons are shared unequally, leading to a dipole moment.
Which of the following compounds is an example of a polar covalent compound?- a)H2O
- b)N2
- c)H2
- d)Cl2
Correct answer is option 'A'. Can you explain this answer?
Which of the following compounds is an example of a polar covalent compound?
a)
H2O
b)
N2
c)
H2
d)
Cl2
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Learnever Education answered |
Water (H2O) is a classic example of a polar covalent compound. In water, the shared electrons are unequally distributed, which creates a dipole moment, resulting in partial positive and negative charges on the molecule.
What defines a redox reaction?- a)A reaction where oxidation and reduction occur simultaneously
- b)A reaction that produces heat
- c)A reaction involving only ionic compounds
- d)A reaction that only involves gases
Correct answer is option 'A'. Can you explain this answer?
What defines a redox reaction?
a)
A reaction where oxidation and reduction occur simultaneously
b)
A reaction that produces heat
c)
A reaction involving only ionic compounds
d)
A reaction that only involves gases
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Learnever Education answered |
A redox reaction is characterized by the simultaneous occurrence of oxidation (loss of electrons) and reduction (gain of electrons). This interplay is essential for many chemical processes, including combustion and respiration.
Which of the following describes a reducing agent in a redox reaction?- a)Remains unchanged
- b)Gains electrons
- c)Loses electrons
- d)Is always an ionic compound
Correct answer is option 'C'. Can you explain this answer?
Which of the following describes a reducing agent in a redox reaction?
a)
Remains unchanged
b)
Gains electrons
c)
Loses electrons
d)
Is always an ionic compound
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Learnever Education answered |
A reducing agent is defined as a substance that loses electrons during a redox reaction. By losing electrons, it facilitates the reduction of another substance, which gains those electrons.
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