1099+ Important Chemistry MCQ Questions Answers

Q:

SO2 Polar or Nonpolar?

Answer

SO2 has a net dipole moment and has a bent shape in its structure as water molecule. Hence it is a polar molecule.

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Q:

Synthetic detergents are prepared from

A) potassium salts of higher fattyacids	B) sodium salts of higher fattyacids
C) hydrocarbons of petroleum	D) glycerides

Answer & Explanation Answer: C) hydrocarbons of petroleum

Explanation:

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Q:

What is the value of triple point (solid, liquid and gas) of Water?

A) 273.16° C	B) -273.16 K
C) 273.16 K	D) 0° C

Answer & Explanation Answer: C) 273.16 K

Explanation:

The temperature at which a substance can exist in equilibrium in the liquid, solid, and gaseous states. The triple point of pure water is at 0.01°C (273.16K, 32.01°F).

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Q:

Vinegar is __________ .

A) diluted acetic acid	B) glacial acetic acid
C) glacial formic acid	D) diluted formic acid

Answer & Explanation Answer: A) diluted acetic acid

Explanation:

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Q:

Alcohol is more volatile than water because _________ is lower than water

A) its boiling point	B) its density
C) its viscosity	D) its surface tension

Answer & Explanation Answer: A) its boiling point

Explanation:

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Q:

Ammonia can be dried by

A) Sulphuric acid	B) Calcium oxide
C) Phosphorus pentoxide	D) Calcium Chloride

Answer & Explanation Answer: D) Calcium Chloride

Explanation:

Ammonia can be dried by Calcium Chloride or calcium hydroxide.

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Q:

Which of the following is not a type of chemical weathering?

A) Corrosion	B) Solution
C) Oxidation	D) Carbonation

Answer & Explanation Answer: A) Corrosion

Explanation:

Chemical weathering is the process of altering rocks chemically when they are broken down. It includes hydrolysis, oxidation, acid rain, etc...

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Q:

How many atoms are present in a $(NH$ ₄)2SO4 molecule?

A) 15	B) 14
C) 13	D) 12

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