Question:

Molasses a by-product in the manufacture of sugar, is converted into –

A.

alcohol

B.

paper

C.

fuel

D.

pulp

Answer» a. alcohol

Question:

Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid?

A.

Methylene blue

B.

Methyl red

C.

Phenolphthaline

D.

Methyl orange

Answer» d. Methyl orange

Question:

Muscle fatigueisaccumulation of :(1) Pyruvic acid(2) Lactic acid(3) Oxalacetic acid(4) Uric acidQ.30) A mixture of water and alcohol can be separated by –

A.

Filtration

B.

Evaporation

C.

Distillation

D.

Decantation

Answer» c. Distillation

Question:

Gunpowder consits of a mixture of –

A.

sand and TNT

B.

TNT and charcoal

C.

nitre, sulphur and charcoal

D.

sulphur, sand and charcoal

Answer» c. nitre, sulphur and charcoal

Question:

Dry powder fire extinguishers contain –

A.

sand

B.

sand and sodium carbonate

C.

sand and potassium carbonate

D.

sand and sodium bicarbonate

Answer» d. sand and sodium bicarbonate

Question:

Aspirin is chemically known as –

A.

methyl salicylate

B.

hydroxysalicylate

C.

acetylsalicylic acid

D.

alkylsalicylic acid

Answer» c. acetylsalicylic acid

Question:

In which of the following states maximum iron are is found?

A.

FeCO3

B.

Fe2O3

C.

Fe3O4

D.

FeS2

Answer» b. Fe2O3

Question:

Aluminium can be purified by –

A.

oxidation

B.

distillation

C.

electrolysis

D.

ozonolysis

Answer» c. electrolysis

Question:

Detergents used for cleaning clothes and utensils contain –

A.

nitrates

B.

bicarbonates

C.

sulphonates

D.

bismuthates

Answer» c. sulphonates

Question:

Which type of glass is used for making glass reinforced plastic?

A.

Pyrex glass

B.

Flint glass

C.

Quartz glass

D.

Fibre glass

Answer» d. Fibre glass