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Chemistry MCQs

Mixture of two metals is called:

A. Dispersant

B. Alloy

C. Amalgam

D. Metalloid

In 1774 Oxygen was discovered by:

A. Newton

B. Priestly

C. Faraday

D. B. Franklin

The element required for solar energy conversion is:

A. Silicon

B. Germanium

C. Uranium

D. Selenium

Which one of the following greenhouse gases has the greatest warming effect?

A. Carbon dioxide

B. Carbon monoxide

C. Methane

D. Helium

Liquids that evaporate quickly are known as:

A. Viscous

B. Volatile

C. Transient

D. None of these

Sulfuric acid was prepared by:

A. Johann Glauber

B. Peregrine Phillips

C. Jabir bin Hayyan

D. None of these

The difference between isotopes of ab element is due to the presence of a different number of:

A. Protons

B. Neutrons

C. Electrons

D. Photons

The element first detected spectroscopically in the sun’s atmosphere is:

A. O2

B. Ne

C. H2

D. He

The first metal to be used by man was:

A. Aluminum

B. Copper 

C. Silver

D. Iron

The gas used in the manufacture of banaspati from vegetable oil is:

A. Hydrogen 

B. Oxygen

C. Nitrogen

D. Carbon dioxide

The hardest form of carbon is:

A. Coke

B. Graphite

C. Carbon 

D. Charcoal

The major constituent of Air is:

A. Nitrogen 

B. Carbon dioxide

C. Oxygen

D. Hydrogen

The method that cannot be permanently used for removing permanent hardness of water is:

A. Adding sodium carbonate

B. Distillation

C. Adding caustic soda

D. Boiling

The most commonly used bleaching agent is:

A. Sodium Chloride

B. Carbon dioxide

C. Chlorine 

D. Alcohol

The most malleable metal is:

A. Platinum

B. Silver

C. Iron

D. Gold

The names of scientists, Newlands, Mendeleev, and Meyer are associated with the development of:

A. Atomic Structure

B. Metallurgy

C. Periodic table of elements

D. Discovery of elements

Purest form of Iron is:

A. Pig Iron

B. Cast Iron

C. Wrought Iron

D. Stainless Steel

 

The term ‘Carat’ is used to express the purity of gold. The purest form of gold is:

A. 18 Carats

B. 20 Carats

C. 22 Carats

D. 24 Carats

The two elements that exist as liquids at 25° C are

A. Mercury and lithium

B. Mercury and Caesium

C. Bromine and Mercury

D. Argon and Mercury

What is chemical name of bleaching powder?

A. Calcium Carbonate

B. Calcium Hydro chloride

C. Calcium Phosphate

D. Calcium Cynamide

Which of the following elements is found in all organic compounds?

A. Calcium

B. Nitrogen

C. Carbon

D. Oxygen

Which of the following gases is the most toxic?

A. Carbon dioxide

B. Carbon monoxide

C. Sulphur Dioxide

D. Acetic Acid

 

Which of the following gas is used in the cigarette lighters?

A. Butane

B. Methane

C. Propane

D. Radon

Which of the following is a chemical change?

A. Evaporation of water

B. Burning of candle

C. Glowing of an electric bulb

D. Liquefaction of air

Which of the following has same atomic number and atomic weight?

A. Hydrogen

B. Helium

C. Oxygen

D. Nitrogen

Which of the following is a fertilizer?

A. Sodium Nitrate

B. Sodium Carbonate

C. Sodium peroxide

D. Sodium Thiosulphate

 

Which of the following is not chemical action?

A. Burning of coal

B. Conversion of steam to water

C. Digestion of food

D. Burning of paper

Which of the following is lightest gas?

A. Nitrogen

B. Hydrogen 

C. Ammonia

D. Carbon dioxide

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