Question:

Pasteurisation of milk means –

A.

heating of milk to above 72°C

B.

heating of milk to above 62°C

C.

cooling of milk to about 62°C

D.

cooling of milk to about 10°C

Answer» b. heating of milk to above 62°C

Question:

Polythene is industrially prepared by the polymerization of –

A.

Methane

B.

Styrene

C.

Acetylene

D.

Ethylene

Answer» d. Ethylene

Question:

Which of the following acids is present in sour milk?

A.

Formic acid

B.

Lactic acid

C.

Citric acid

D.

Tartaric acid

Answer» b. Lactic 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:

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