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 Chemistry Questions

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Q:

Which substance contains metallic bonds?

A) C6H12O6 B) Hg
C) H2O D) NaCl
 
Answer & Explanation Answer: B) Hg

Explanation:

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

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Q:

Which one phosphorylates ADP to make ATP?

Answer

ATP synthase Phosphorylates ADP to make ATP.

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Q:

The pH of pure water is nearly 7.It will increase on the addition of

A) ammonia B) cane sugar
C) common salt D) hydrochloric acid
 
Answer & Explanation Answer: A) ammonia

Explanation:

Ammonia is a base. One adding ammonia to water,the resulting solution will become basic. pH of an alkaline solution is 7. So the pH will increase

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Q:

Which of the following is a polymer?

A) Glycerol B) Amino acid
C) Nucleic acid D) Fatty acid
 
Answer & Explanation Answer: C) Nucleic acid

Explanation:

Nucleic acid is a polymer among the given options.

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Q:

Bleaching powder is used in drinking water as

A) Disinfectant B) Antibiotic
C) Coagulant D) Antiseptic
 
Answer & Explanation Answer: A) Disinfectant

Explanation:
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Q:

Which statement describes nuclear binding energy?

A) It is the energy that is required to overcome mass defect. B) It is the result of converting mass to energy.
C) It is the energy that is required to bind protons and neutrons together in a nucleus. D) None of the above
 
Answer & Explanation Answer: A) It is the energy that is required to overcome mass defect.

Explanation:

Nuclear binding energy is the minimum energy that would be required to disassemble the nucleus of an atom into its component parts. These component parts are neutrons and protons, which are collectively called nucleons.

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Q:

A proton is identical to _____.

A) the nucleus of helium B) the nucleus of a hydrogen atom
C) an alpha-particle D) a beta particle
 
Answer & Explanation Answer: D) a beta particle

Explanation:
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Q:

Kaolin is chemically classified as

A) Argillaceous rock B) Silicious rock
C) Metamorphic rock D) Calcareous rock
 
Answer & Explanation Answer: A) Argillaceous rock

Explanation:

Kaolin is chemically classified as Argillaceous rock.

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