Chemistry Questions

Q:

By volume, 78% of air is _______________

A) nitrogen B) oxygen
C) hydrogen D) helium
 
Answer & Explanation Answer: A) nitrogen

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Q:

Which of the following is usually not an air­pollutant?

A) Hydrocarbons B) Sulphur dioxide
C) Carbon dioxide D) Nitrous oxide
 
Answer & Explanation Answer: D) Nitrous oxide

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0 1377
Q:

Which of the following allotropes of Carbon is used as a reducing agent in metallurgy?

A) Carbon Black B) Graphite
C) Charcoal D) Coke
 
Answer & Explanation Answer: D) Coke

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Q:

Aluminium oxide is ___ in nature.

A) amphoteric B) acidic 
C) neutral D) basic
 
Answer & Explanation Answer: A) amphoteric

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2 1374
Q:

In the Modern Periodic Table, elements are arranged in

A) increasing atomic mass number B) increasing atomic number
C) decreasing atomic mass number D) decreasing atomic number
 
Answer & Explanation Answer: B) increasing atomic number

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0 1373
Q:

Dried fruit like raisins when soaked in water, bulge and get filled with water. What is the scientific reason that explains this daily life event?

 

A) Osmosis B) Active Transport
C) Diffusion D) Passive Transport
 
Answer & Explanation Answer: A) Osmosis

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1 1373
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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3 1372
Q:

___ is amphoteric in nature.

A) SO2 B) CaO
C) ZnO D) N2O
 
Answer & Explanation Answer: C) ZnO

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