A. due to presence of dust in air
B. carbon dioxide and water in clouds react to form carbonic acid
C. Ozone depletion
D. All of these
A. Hydrogen
B. Neon
C. Carbondioxide
D. Argon
The most common gas people breathe from clean air is nitrogen. Air is a mixture of gases, and the air on Earth contains about 78 percent nitrogen and about 21 percent oxygen. Argon, carbon dioxide neon, helium, methane, krypton, hydrogen and xenon are in much smaller amounts.
A. Cure
B. Germs
C. Cause
D. Patient
A. Normal pressure
B. Very low pressure
C. Very high pressure
D. None of these
The Beta particles are fast moving___________?
A. Protons
B. Electrons
C. Neutrons
D. None
A. Luminous Flux
B. Illumination
C. Luminous Intensity
D. Focus
A. Snakes and birds
B. Bat and rats
C. Frog and snakes
D. Birds and monkey
The answer is the pair of frogs and snake are both cold blooded animals. Both these animals belong to amphibian and reptile category, respectively. Both the animals are known for their cold blood.