11)

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.

12)

What is the generic name of calcium sulphate hemihydrate?

SSC CHSL 2021

A)

Baking soda

B)

Vinegar

C)

Plaster of Paris

D)

Detergent powder

13)

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.

14)

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

SSC CHSL 2021

A)

Sodium

B)

Gelatin

C)

Baking Soda

D)

Chlorine

15)

Litmus paper changes to_____ colour when put in soap water.

SSC CHSL 2021

A)

blue

B)

orange

C)

yellow

D)

red

16)

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

17)

Which of the following is a polar molecule?

SSC CHSL 2021

A)

Carbon dioxide

B)

Carbon tetrachloride

C)

Water

D)

Benzene

18)

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

19)

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

20)

Onions produce the chemical irritant known as syn-propanethial-S-oxide; this stimulates the eyes' ______ glands which release tears.

SSC CHSL 2021

A)

parotid

B)

lachrymal

C)

submandibular

D)

sublingual