Second name of ethyl alcohol is___________?
Second name of ethyl alcohol is___________?A. Ethene
B. Ethanol
C. Propyle
D. none
B. Ethanol
C. Propyle
D. none
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What is the molecular formula for Ammonia?
What is the molecular formula for Ammonia?A. NH
B. NH2
C. NH3
D. NH4Quantity of fresh air required for a man is 1000 cubic feet of air for every____________?
Quantity of fresh air required for a man is 1000 cubic feet of air for every____________?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 20 minutesHeat transfer horizontally within the atmosphere is called?
Heat transfer horizontally within the atmosphere is called?A. Conduction
B. Convection
C. Absorption
D. AdvectionWhat divides the Earth into the Northern and the Southern Hemispheres?
What divides the Earth into the Northern and the Southern Hemispheres?A. Axis of rotation
B. Equator
C. North Pole
D. South PoleOzone layer prevents ______________ radiation from entering the atmosphere?
Ozone layer prevents ______________ radiation from entering the atmosphere?A. Infra-red
B. Ultraviolet
C. X-rays
D. Gamma rays
E. None of theseThe blueness of the sky is mainly due to _____________?
The blueness of the sky is mainly due to _____________?
A. The scattering of sunlight by air molecules
B. The presence of water vapor
C. Absorption of blue light by the air
D. Emission of blue light by the atmosphere