Chemistry
Assertion (A): Excessive burning of fossil fuels and the use of automobiles do not cause air pollution.
Reason (R): Incomplete combustion of fuels which leads to the formation of CO is a cause of air pollution.
- 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.
Pollution
1 Like
Answer
A is false but R is true.
Explanation— Excessive burning of fossil fuels and the use of automobiles cause air pollution and global warming. Hence, the assertion (A) is false.
Carbon monoxide is formed by incomplete combustion of fuels in homes, factories and automobiles. Carbon monoxide is a highly poisonous gas. Hence, the reason (R) is true.
Answered By
1 Like
Related Questions
pH of acid rain usually ranges between:
P — 7.5 to 9.7
Q — 2 to 5
R — 3.5 to 5.6
- Only P
- Only Q
- Only R
- Both Q and R
Assertion (A): There is a gradual increase in the average temperature of the earth's surface.
Reason (R): Greenhouse effect is responsible for the increase in earth's temperature.
- 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.
Assertion (A): The formation of ozone involves a chemical reaction called photolysis.
Reason (R): The highly energetic ultraviolet radiation from the sun breaks the oxygen molecules into oxygen atoms. Oxygen atoms then react with oxygen molecules to form ozone.
- 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.
Assertion (A): Photochemical smog is composed of oxides of nitrogen, ozone, peroxyacetyl nitrates and other organic compounds.
Reason (R): Photochemical smog is formed by the interaction of certain pollutants in cold weather conditions.
- 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.