Chemistry Questions

Q:

A change in which one or more new substances are formed is called _________.

A) Physical Change B) Chemical Change
C) Rusting D) Galvanisation
 
Answer & Explanation Answer: B) Chemical Change

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Q:

In the following reaction, fill in the blank.
Acid + Base → _______ + Water

A) Carbon dioxide B) Metal Oxide
C) Hydrogen Gas D) Salt
 
Answer & Explanation Answer: D) Salt

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Q:

Nylon threads are made of

A) Polyester polymer B) Polyamide polymer
C) Polyvinyl polymer D) Polysaccharide
 
Answer & Explanation Answer: B) Polyamide polymer

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Q:

Which of the following is not soluble in water?

A) Lead sulphate B) Zinc sulphate
C) Potassium sulphate D) Sodium sulphate
 
Answer & Explanation Answer: A) Lead sulphate

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Q:

All atoms of the same element have the same

A) number of protons B) number of electrons
C) atomic number D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

All atoms of an element have the same number of protons. The number of protons in an element is a primary identifier known as its atomic number. The number of electrons is the same as the number of protons.

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Q:

Kidney stones are composed of ______.

A) Calcium Oxalate B) Sodium Chloride
C) Magnesium Nitrate D) Calcium Bicarbonate
 
Answer & Explanation Answer: A) Calcium Oxalate

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Q:

The upper part of the heterosphere is composed almost completely of which gas?

A) Ozone B) Nitrogen
C) Oxygen D) Hydrogen
 
Answer & Explanation Answer: D) Hydrogen

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Q:

Atomic number of which of the following elements is greater than that of Chlorine

A) Potassium B) Sulphur
C) Aluminium D) Phosphorus
 
Answer & Explanation Answer: A) Potassium

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