Smoke is produced due to__________________?

Related Mcqs:

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

A. 102 B. 105 C. 109 D. 1015...

Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?

A. CO2 B. SO2 C. Hydrocarbons D. CFC (chloro fluoro carbon)...

Pick out the wrong statement pertaining to ‘green house’ for the plants ?

A. ‘Green house’ (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants inside it B. The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed by the glass of the green house C. … Pick out the wrong statement pertaining to ‘green house’ for the plants ?Read More...

Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?

B. Cooling and freezing of water kills the bacteria present in it C. With increasing boiler operating pressure of steam, the maximum allowable concentration of silica in feed water goes on decreasing D. Dissolved oxygen content in high pressure boiler feed water should be nil...

Radioactive solid nuclear wastes are disposed off by _________________?

A. High temperature incineration B. Pathological incineration C. Pyrolysis D. Underground burial in concrete containers...