Give scientific reason on : Sewage should be released into rivers only after oxidation .

Give scientific reason : Milk is pasteurized at the beginning .

Give reason for the following statement- Sewage should not be disposed of in rivers or oceans before treatment.

Give a scientific reasons: Tungestm metal is used to make a solenoid type coil in an electric bulb.

X- ray should not be taken often'. Give the reason.

Which one of the following statements gives correct reason for 'The charge g iven to any conductor resides on its outer surface only

Assertion : 'Cry' proteins are named so because they are crystal proteins Reason : 'Cry' proteins are solubilised is acidic environment of insect midgut and then release toxic core fragments after proteolytic action.

Assertion : Through the use of catalytic converters, unburnt hydrocarbons are changed into carbon monoxide which in turn is changed into nitrogen oxides and water. Reason : Motor vehicles equipped with catalytic converters should use leaded petrol to protect the catalyst from degradation.