31)

Who among the following is considered as the ‘Father of Modern Atomic Theory’?

SSC CHSL 2021

A)

Willard Gibbs

B)

Otto Hahn

C)

John Dalton

D)

Robert Boyle

32)

Which of the following is NOT a use of washing soda?

SSC CHSL 2021

A)

It can be used as a cleaning agent for domestic purposes.

B)

It is used in glass, soap and paper industries

C)

It is used for removing permanent hardness of water.

D)

It is used to make drinking water free from germs.

33)

What is the generic name of calcium sulphate hemihydrate?

SSC CHSL 2021

A)

Baking soda

B)

Vinegar

C)

Plaster of Paris

D)

Detergent powder

34)

Which of the following statements about bromine is correct?

SSC CHSL 2021

A)

It is a solid at room temperature.

B)

It is a gas at room temperature.

C)

It is a metal.

D)

It is a liquid at room temperature.

35)

Which among the following is used as a fining agent in wine?

SSC CHSL 2021

A)

Sodium

B)

Gelatin

C)

Baking Soda

D)

Chlorine

36)

Litmus paper changes to_____ colour when put in soap water.

SSC CHSL 2021

A)

blue

B)

orange

C)

yellow

D)

red

37)

Due to which of the following reactions are household bleaching agents using phosphorous, sulphur and chlorine formed?

SSC CHSL 2021

A)

Displacement reaction

B)

Disproportionation reaction

C)

Combination reaction

D)

Decomposition reaction

38)

Which of the following is a polar molecule?

SSC CHSL 2021

A)

Carbon dioxide

B)

Carbon tetrachloride

C)

Water

D)

Benzene

39)

Which one of the following features is NOT shown by metals?

SSC CHSL 2021

A)

Conducts heat

B)

Can be pounded into shape

C)

Looks dull

D)

Can be made into a wire

40)

In which of the following options is the substance INCORRECTLY paired with the acid present in that substance?

SSC CHSL 2021

A)

Tomato - Oxalic Acid

B)

Orange - Citric Acid

C)

Vinegar - Acetic Acid

D)

Lemon - Lactic Acid