NVS Lab Attendant Mock Test - 4 - NVS TGT/PGT MCQ

Clearly, each word is coded by the numeral which is 1 less than the number of letters in the word.
Since, there are 10 letters in the word GOVERNMENT, so required = 10 – 1 = 9.
Hence, option C is correct.

As magnet has poles similarly battery has terminals.

As 24:60 = (2/5)

Similarly, (120/300) = (2/5)

The correct answer is NaHCO3.

Key Points

• Chemically known as sodium bicarbonate, the formula of baking soda is NaHCO3.
• Baking soda is a white and crystalline salt that is made up of bicarbonate anion and sodium cation.

Additional Information

The correct answer is 1907

Key Points

• The Surat session of the Indian National Congress concluded on 26 December 1907.
• Due to differences between the Naram dal and Garam dal, the Congress was split into two parts in this session.
• In the Lucknow session in 1916, the two parties, the Naram dal, and Garam dal, became one.
• The Surat session was presided over by Dr Rasbihari Bose in 1907.
• The Lucknow session was presided over by Ambika Charan Mazumdar in 1916

‘रोटी’ शब्द स्त्रीलिंग है। अतः इसका सही उत्तर ‘रोटी’ होगा।
Key Points

स्पष्टीकरण:

• पहाड़, पीतल और नीलम शब्द पुल्लिंग हैं।
• ‘रोटी’ शब्द स्त्रीलिंग है।

वाक्य -

• रोटी की बनावट गोल होनी चाहिए।
• रोटी खाने की वस्तु है।

Mistake Points

• रत्नों के नाम पुल्लिंग होते हैं। जैसे- नीलम, पुखराज, मूँगा, माणिक्य, मोती, हीरा, पन्ना आदि।
• नीलम एक रत्न है, इसलिए पुल्लिंग शब्द होगा

Infrequent: This term suggests occurrences that happen with less frequency than typical or expected.

Rare: "Rare" conveys a higher degree of scarcity or unusualness compared to "infrequent." Something that is rare happens very seldom, with a low probability of occurrence.

दिए गए विकल्पों में से सही उत्तर विकल्प 1 'कार्य से निवृत्त होना’ है। अन्य विकल्प इसके गलत उत्तर हैं।

Key Points

• मुहावरा- गंगा नहाना
• अर्थ - ​कार्य से निवृत्त होना
• वाक्य - हर कोई अपना काम करके गंगा नहाने की चाह रखता है।
• अन्य विकल्प अनुचित हैं।

अन्य विकल्प:

Additional Information

• मुहावरा का शाब्दिक अर्थ ‘अभ्यास’ है।
• मुहावरा शब्द अरबी भाषा का शब्द है।
• हिन्दी में ऐसे वाक्यांशों को मुहावरा कहा जाता है, जो अपने साधारण अर्थ को छोड़कर विशेष अर्थ को व्यक्त करते हैं।

संस्कार शब्द में सम्​ उपसर्ग का प्रयोग हुआ है। अन्य विकल्प असंगत है। अतः सही उत्तर विकल्प 1) सम्​ होगा ।

Key Points

• "सम्" संस्कृत का उपसर्ग है।
• "सम्" का अर्थ उत्तम,साथ एवं पूर्ण होता है।

Important Points

Additional Information

The original sentence "Her mother bought the house" is in the active voice.

The correct option that expresses the same sentence in the passive voice is:

D. The house was bought by her mother.

सही उत्तर 'मेरा यह सोचना, सही निकला' है।

• मेरा यह सोचना कि लोकेश प्रतिभाशाली छात्र है, सही निकला। इस वाक्य में ‘मेरा यह सोचना’ 'सही निकला' प्रधान उपवाक्य है।
• किसी वाक्य में जो उपवाक्य किसी पर आश्रित नहीं होता अर्थात् स्वतंत्र होता है एवम् उसकी क्रिया मुख्य होती है, वह मुख्य या प्रधान उपवाक्य कहलाता है।
• जैसे – मोदी जी ने कहा कि अच्छे दिन आएँगे।
• इस वाक्य में ‘मोदी जी ने कहा’प्रधान उपवाक्य है।

Key Points

• उपवाक्य: ऐसा पदसमूह, जिसका अपना अर्थ हो, जो एक वाक्य का भाग हो और जिसमें उदेश्य और विधेय हों, उपवाक्य कहलाता हैं।
• उपवाक्यों के आरम्भ में अधिकतर कि, जिससे, ताकि, जो, जितना, ज्यों-त्यों, चूँकि, क्योंकि, यदि, यद्यपि, जब, जहाँ इत्यादि होते हैं।
• उपवाक्य दो तरह के होते हैं – प्रधान उपवाक्य, आश्रित उपवाक्य।
• आश्रित उपवाक्य: दूसरे उपवाक्य पर आश्रित होता है।
• आश्रित उपवाक्य क्योंकि, कि, यदि, जो, आदि से आरंभ होते हैं।
• जैसे –मोदी जी ने कहा कि अच्छे दिन आएँगे।
• इस वाक्य में "कि अच्छे दिन आएँगे।" आश्रित उपवाक्य है क्योंकि यह उपवाक्य "मोदी जी ने कहा" उपवाक्य पर आश्रित है।

• Lump sum: a single payment made at a particular time, as opposed to a number of smaller payments or installments.
• Strong: having the power to move heavy weights or perform other physically demanding tasks.
• Little: small in size, amount, or degree.
• Huge: extremely large; enormous.
• Massive: exceptionally large.

So, the synonym of Massive is Huge.

Bromine is the only non-metal at room temperature because the intermolecular forces are strong enough so that it does not vaporize at room temperature.

Carbon, in the form of Graphite is a good conductor of electricity. It conducts heat and electricity like a metal or a metalloid.

Force is a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object

Option C is correct.

The Correct Answer is Option (3) i.e. Nitrogen Oxides.

• The two most common and hazardous oxides of nitrogen are nitric oxide and nitrogen dioxide.
• The oxides of nitrogen are the major pollutants of air pollution and global warming.
• Soil pollution refers to the contamination of the soil with anomalous concentrations of toxic substances.
• The different types of pollutants that are found in contaminated soil are given below :
  • Hydrocarbons - 42%
  • Heavy Metals - 31%
  • Mineral Oil - 20%
  • Other - 7%

• Hydrochloric acid is found in the human stomach.
• Formula- HCl
• Hydrochloric acid helps in digestion by breaking complex large food molecules into simpler molecules.
• The acid activates the pepsinogen enzyme required to digest proteins.
• It also kills harmful microorganisms present in the stomach.
• It is also known as muriatic acid

Statement: Which of the following statement is always correct?


Options:


A: An atom has equal number of electrons and protons.


B: An atom has equal number of electrons and neutrons.


C: An atom has equal number of protons and neutrons.


D: An atom has equal number of electrons, protons and neutrons.
Answer: A. An atom has equal number of electrons and protons.
Detailed


An atom is the basic unit of matter and consists of subatomic particles - protons, neutrons, and electrons. Let's analyze the given statements to determine the correct one.
1. Statement A: An atom has an equal number of electrons and protons.
- This statement is always correct because in a neutral atom, the number of electrons is equal to the number of protons. Electrons carry a negative charge (-1), while protons carry a positive charge (+1). The charges balance each other out, resulting in a neutral overall charge for the atom.
2. Statement B: An atom has an equal number of electrons and neutrons.
- This statement is incorrect. Neutrons are neutral particles and do not carry any charge. Therefore, the number of electrons and neutrons in an atom can be different.
3. Statement C: An atom has an equal number of protons and neutrons.
- This statement is incorrect. Protons and neutrons are different types of particles with different properties. While the number of protons determines the element and its atomic number, the number of neutrons can vary within isotopes of the same element.
4. Statement D: An atom has an equal number of electrons, protons, and neutrons.
- This statement is incorrect. The number of electrons, protons, and neutrons in an atom can be different. Only in a neutral atom, the number of electrons is equal to the number of protons.
Conclusion:


Among the given statements, statement A is always correct. In a neutral atom, the number of electrons is equal to the number of protons.

Cellular respiration allows organisms to use energy stored in the chemical bonds of glucose. The energy in glucose is used to produce  ATP. Cells use ATP to supply their energy needs. Cellular respiration is therefore a process in which the energy in glucose is transferred to ATP.

According to sign convention distances and points are given their positive or negative sign on the basis of direction of propagation of incident Ray and the focus of both convex mirror and lens are in the front of propagating incident Ray of light so it is taken as positive.

Twinkling of star is due to atmospheric refraction of starlight caused by the gradual change in refractive index of different air layers at different height, the apparent position of star keeps on changing.

The urethra in the male reproductive system serves as a common passage for both sperm and urine. It is a tube that carries urine from the bladder and also serves as a passage for the transport of sperm during ejaculation.

It is in uniform motion because it is travelling equal distances in equal intervals of time

Dalton’s Atomic Theory was given by John Dalton.
According to this theory: -
(a) Matter is made up of invisible particles known as atoms.
(b) The properties of all the atoms of a given element are the same including mass.
(c) Atoms of different elements combine in fixed ratios to form compounds.
(d) Atoms are neither created nor destroyed.
(e) The formation of new products results from the rearrangements of existing atoms.
(f) Atoms of an element are identical in mass, size and properties.

The correct answer is D as All of them have  valence electrons equal to seven and this can accept one electron to complete their octet

In evaporation when the temperature is increased the molecules gain kinetic energy and molecules start to move faster and in order to become ga, it must overcome intermolecular forces between different molecules. Increasing the speed, molecules break free from bonds and evaporates.

Ethanol contains alcohol as the functional group.
Ethane + ol = Ethanol.

Using electromagnet, the magnetic field strength further increase by increasing the current. Hence it will enhance the power of electric.

A body whose position with respect to surrounding doesn't change is said to be in a state of rest .

His displacement will be zero although distance covered is non-zero since he ends up where he started.

Displacement can be zero but distance cannot be zero because distance is the total path covered but displacement is the shortest distance between the initial and final position. It can be zero at the end of one round.