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371.

Heliochemical process is the process by which

A.	solar energy is utilized through photosynthesis	B.	neutron energy is converted into thermal energy
C.	geothermal energy is converted into electrical energy	D.	wind energy is converted into electrical energy

372.

Which of the following power plant is free from environmental pollution problems?

A.	Thermal power plant	B.	Nuclear power plant
C.	Hydro power plant	D.	Geothermal power plant

373.

Existence of which gs in atmosphere causes green house effect?

A.	Carbon dioxide	B.	Hydrogen sulphide
C.	Nitrogen	D.	Hydrogen

374.

The presence of CO2 and H2O in the atmosphere results in absorption of

A.	short wave ultraviolet radiations	B.	visible wavelengths of spectrum
C.	long wave infrared radiations	D.	all of the above

375.

Return to earth of the oxides of sulphur and nitrogen occurs in the form of

A.	acid rain	B.	acid show
C.	acid fog	D.	any of the above

376.

The average pH of the normal rainfall is usually

A.	neutral	B.	slightly acidic
C.	slightly alkaline

377.

Earth coal is

A.	lignite	B.	coal dust
C.	black earth	D.	wet coal

378.

Ebb current is

A.	the same as eddy current	B.	the movement of the tidal current away from shore or down a tidal stream
C.	the removal by screen of undesirable fine materials from broken ore	D.	none of the above

379.

Ekman spiral is an idealized mathematical description of

A.	ocean temperature gradient	B.	wind distribution in the planetary boundary layer
C.	carbon dioxide percentage variation with elevation	D.	radioactive decay of materials

380.

Which of the following converts electrical energy to radiant heat?

A.	Solat cell	B.	Storage battery
C.	Wankel engine	D.	Incandescent lamp