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201. The law of definite proportions is associated with the name of

A. Proust

B. Lavoisier

C. Dalton

D. Gay - Lussac

Explanation:

202. Which type of fire extinguisher is used for petroleum fire ?

A. Foam type

B. Soda acid type

C. Powder type

D. None of these

Explanation:

203. Pressure cooker is fast in cooking rice because

A. it lets the steam escape.

B. it does not let the heat energy escape easily.

C. high pressure crushes the hard covering of rice grains.

D. high pressure raises the boiling point of water.

Explanation:

204. When milk is churned, the cream is separated from it due to

A. frictional force

B. cohesive force

C. gravitational force

D. centrifugal force

Explanation:

205. The first successful heart transplant in India was performed by

A. Dr. Venugopal

B. Dr. Caroli

C. Dr. Padmavati

D. Dr. Dastur

Explanation:

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