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1331. When an electric bulb breaks, there is a mild bang due to :
A. the chemical reaction between the enclosed gases
B. the compressed gases rushing out suddenly
C. the air rushing in to fill the evacuated space
D. none of the above
Explanation:
1332. The fractionation of petroleum gives many products. What is the correct order in which the various fractions mentioned below separate from petroleum ? 1. Gasoline 2. Kerosene3. Diesel oil 4. Lubricating oil
A. 1, 2, 3, 4
B. 2, 3, 4, 1
C. 3, 2, 1, 4
D. 4, 2, 3, 1
Explanation:
1333. Which form of phosphorus is used in safety matches ?
A. White phosphorus
B. Yellow phosphorus
C. Red phosphorus
D. Black phosphorus
Explanation:
1334. A liquid rises in a syringe when its piston is pulled up because :
A. of the property of surface tension
B. of capillary action
C. of the action of atmospheric pressure
D. there is a force of cohesion between the liquid molecules and the glass syringe
Explanation:
1335. Soda water contains
A. nitrous acid
B. carbonic acid
C. carbon dioxide
D. sulphuric acid
Explanation:
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