Which of the following is a main air pollutant
Co2
N2
No2
Co
Co2 gas is
Lighter than air
Heavier than air
Neither lighter nor heavier
None of these
The gas used for freshing food packet is
He
Ne
O
Kr
Increased concentration of Co2 in atmosphere is responsible for
Green house effect
Acid rain
Lack of photosynthesis
Damage of aquatic life
The physical method used to separate the components of air
Crystallization
Sublimation
Distillation
Fractional distillation
The gas used to glow bulb
Rn
The acid rain does not occur by
Sulphuric acid
Nitric acid
Sulfurous acid
Acetic acid
Which is used in welding?
Oxy-hydrogen
Oxy chlorine
Oxy nitrogen
Ox y fluorine
Which of the following is formed by reaction of U.V light?
So2
O3
