Brass gets discoloured in air because of the presence of which of the following gases in air?

Soap is a mixture of sodium or potassium salts of

Nuclear fission is caused by the impact of

__________ acts as a shield absorbing ultraviolet radiation from the sun.

__________ is a telecommunications network or computer network that extends over a large geographical distance.

______________ is made up of smoke and fog._x005F_x000D_

______________ kills the germs present in the water._x005F_x000D_

_____________ is the number of deaths in the population during a given period.

_____________ is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration.

__________ is the number of individuals of the population who left the habitat and gone elsewhere during the time period under consideration.

_________ affect the rate of humus formation of soil.

___________ constitute the biotic component of the biosphere._x005F_x000D_

_______ determines colour, texture, chemical properties, mineral content and permeability of soil.

_________ influences the rate of weathering and humus in soil formation.

_________ is an example of intrusive igneous rock.