Chemistry Questions

Q:

Strength of concrete increases with

A) increase in fineness of cement B) decrease in size of aggregate
C) increase in water cement ratio D) decrease in curing time
 
Answer & Explanation Answer: C) increase in water cement ratio

Explanation:

Strength of concrete increases with increase in water cement ratio as the strength of the cement is directly proportional to water cement ratio.

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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:

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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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 one phosphorylates ADP to make ATP?

Answer

ATP synthase Phosphorylates ADP to make ATP.

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Q:

Through which conversion is energy released?

A) CO2 and H2O to C6H12O6 and O2 B) NADP+ to NADPH
C) ADP to ATP D) ATP to ADP
 
Answer & Explanation Answer: D) ATP to ADP

Explanation:
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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 molecule contains a nonpolar covalent bond?

A) Cl2 B) Br2
C) H2 D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

In all the given options, molecules are containing nonpolar covalent bonds.

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