Chemistry
Assertion (A): Hydroxyl radicals (OH•) are considered the "detergents" of the atmosphere.
Reason (R): Hydroxyl radicals are highly reactive and oxidise many pollutants, breaking them down into less harmful substances.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Chemical Reaction
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — A is true as hydroxyl radicals (OH•) are called the “detergents” of the atmosphere. This is true because they help clean the air.
R is true as (OH•) radicals are highly reactive and oxidise many pollutants like methane and carbon monoxide, breaking them down into less harmful substances that can be removed from the atmosphere.
Therefore, Both A and R are true and R is the correct explanation of A is the correct option.
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(a) What do you understand by the statement "R.A.M. of silver is 108" ?
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(f) Is the atomic mass expressed in amu the actual mass of an atom of that element ?
(g) Why is amu preferred instead of grams or kilogram for calculating the atomic mass of an atom ?