Chemistry Questions

Q:

Which of the following metals cannot be easily cut with a knife?

A) Sodium B) Aluminium
C) Lithium D) Potassium
 
Answer & Explanation Answer: B) Aluminium

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Q:

Which of the following gases is liberated when Sodium Hydrogen Carbonate is heated?

A) Carbon Monoxide B) Carbon Dioxide
C) Oxygen D) Hydrogen
 
Answer & Explanation Answer: B) Carbon Dioxide

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Q:

The credit for classifying the elements on the basis of their atomic masses goes to

A) John Dalton B) John Alexander Reina Newlands
C) Dmitri Mendeleev D) Johann Wolfgang Dobereiner
 
Answer & Explanation Answer: C) Dmitri Mendeleev

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Q:

Which of the following is used in the preparation of tincture iodine, cough syrup and many tonics?

A) Methanol B) Ethanoic acid
C) Acetic acid D) Ethanol
 
Answer & Explanation Answer: D) Ethanol

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Q:

What happens when one S and one P orbital is hybridized?

A) We get three orbitals in a plane B) We get two orbitals at 180 degrees
C) We get two mutually perpendicular orbitals D) We get four orbitals directed tetrahedrally
 
Answer & Explanation Answer: B) We get two orbitals at 180 degrees

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Q:

Atomic mass of Nitrogen is 14 and that of Hydrogen is 1. What will be the molecular mass of Ammonia?

A) 18 B) 17
C) 16 D) 15
 
Answer & Explanation Answer: B) 17

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Q:

Which of the following is not a greenhouse gas?

A) Carbon dioxide B) Methane
C) Chlorofluorocarbons D) Oxygen
 
Answer & Explanation Answer: D) Oxygen

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Q:

The process of reducing the milk fat globules size to allow them to stay evenly distributed in milk is called ____.

A) Standardization B) Pasteurization
C) Homogenization D) Fortification
 
Answer & Explanation Answer: C) Homogenization

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