Chemistry - Mock Test 63

Question 621

What is the main constituent of coal gas?

A) Oxygen B) Water C) Nitrogen D) Methane

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Question 622

Which of the following is the source of common salt?

A) Bauxite B) Pyrite C) Calcite D) Halite

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Question 623

The gas that is responsible for global warming is ?

A) Carbon dioxide B) Oxygen C) Methane D) Sulphur dioxide

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Question 624

Which metal is commonly used for making an electromagnet?

A) Copper B) Cobalt C) Iron D) Nickel

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Question 625

Acetyl salicylic acid is commonly used as ?

A) A pain killer B) A sedative C) Tear gas D) A fertilizer

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Question 626

Commercially, sodium bicarbonate is known as ?

A) Washing soda B) Baking soda C) Bleaching powder D) Soda ash

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Question 627

Which metal remains in the liquid form under normal conditions?

A) zinc B) radium C) uranium D) mercury

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Question 628

Which one of the following is not a chemical change ?

A) Burning of coal in air B) Fermentation of sugarcane juice C) Cracking of petroleum D) Crystallization of table salt from sea water

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Question 629

Which one of the following non metals is not a poor conductor of electricity ?

A) Sulphur B) Selenium C) Bromine D) Phosphorus

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Question 630

Which o f the following is an alloy ?

A) Gold B) Brass C) Copper D) Thorium

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