Chemistry Questions

Q:

In an acid base reaction which product is produced along with a salt?

A) Hydrogen gas B) Water
C) Oxygen gas D) Carbon dioxide
 
Answer & Explanation Answer: B) Water

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Q:

Which of the following is essential for the synthesis of thyroxin?

A) Potassium B) Calcium
C) Iodine D) Sodium
 
Answer & Explanation Answer: C) Iodine

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Q:

Which gas contributes most to the Greenhouse effect?

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

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Q:

A change in which no new substances are formed is called _____________.

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

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Q:

Glass is also called ________.

A) Supercooled liquid B) Super liquid
C) Ideal liquid D) Distilled liquid
 
Answer & Explanation Answer: A) Supercooled liquid

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Q:

NaCl has ______.

A) nonpolar bonds B) polar covalent bonds
C) Metallic bonds D) ionic bonds
 
Answer & Explanation Answer: D) ionic bonds

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Q:

Nitric acid does not react with

A) Gold B) Copper
C) Zinc D) Iron
 
Answer & Explanation Answer: A) Gold

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Q:

Why is Carbon Monoxide a pollutant ?

A) Reacts with haemoglobin B) Makes nervous system inactive
C) It reacts with Oxygen D) It inhibits glycolysis
 
Answer & Explanation Answer: A) Reacts with haemoglobin

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