Chemistry Questions

Q:

The current atomic model would be revised if 

A) better microscopes are invented in the future B) a new element is discovered in the future
C) better microscopes were being used to study its structure D) new information about an atoms structure is discovered
 
Answer & Explanation Answer: D) new information about an atoms structure is discovered

Explanation:
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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:

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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Q:

Which is the most malleable metal?

A) Gold B) Silver
C) Both A & B D) Bronze
 
Answer & Explanation Answer: A) Gold

Explanation:

The most malleable metal is Gold.

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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:

Permanent hardness of water may be removed by the addition of

A) Alum B) Lime
C) Sodium Carbonate D) Potassium Permanganate
 
Answer & Explanation Answer: C) Sodium Carbonate

Explanation:

Permanent hardness of water may be removed by the addition of Sodium Carbonate.

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Q:

Which gas is used in tube light?

A) Oxygen B) Hydrogen
C) Neon D) Nitric oxide
 
Answer & Explanation Answer: C) Neon

Explanation:
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