Peroxyacetyl nitrate is a secondary pollutant present in photochemical smog (a mixture of air pollutants) that includes both gases and particulates. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance.

Correct Option: D

Peroxyacetyl nitrate is a secondary pollutant present in photochemical smog (a mixture of air pollutants) that includes both gases and particulates. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance.

Vinegar is a liquid consisting mainly of acetic acid (CH₃COOH) and water. The acetic acid is produced by the fermentation of ethanol by acetic acid bacteria. It is mainly used as a cooking ingredient.

Correct Option: A

Vinegar is a liquid consisting mainly of acetic acid (CH₃COOH) and water. The acetic acid is produced by the fermentation of ethanol by acetic acid bacteria. It is mainly used as a cooking ingredient.

A carbon footprint is historically defined as “the total sets of greenhouse gas emissions caused by an organization, event, product or person.” The most common way to reduce the carbon footprint of humans is to Reduce, Reuse, Recycle, Refuse. Recycling waste materials, using energy efficient appliances and using public transportation for commutation can all serve to reduce greenhouse gas emissions and, thus, reduce Carbon footprint.

Correct Option: A

A carbon footprint is historically defined as “the total sets of greenhouse gas emissions caused by an organization, event, product or person.” The most common way to reduce the carbon footprint of humans is to Reduce, Reuse, Recycle, Refuse. Recycling waste materials, using energy efficient appliances and using public transportation for commutation can all serve to reduce greenhouse gas emissions and, thus, reduce Carbon footprint.

Seaweed is rich in iodine, a trace element essential for healthy thyroid function and a healthy metabolism. Iodine is particularly vital for pregnant and lactating women. Seaweed also contains zinc and antioxidants, which help strengthen immunity.

Correct Option: A

Seaweed is rich in iodine, a trace element essential for healthy thyroid function and a healthy metabolism. Iodine is particularly vital for pregnant and lactating women. Seaweed also contains zinc and antioxidants, which help strengthen immunity.

Water gas is a synthesis gas, containing carbon monoxide (CO) and hydrogen gas (H₂). It is made by passing steam over a red-hot carbon fuel such as coke. The reaction between steam and hydrocarbons produce the gas mixture.

Correct Option: A

Water gas is a synthesis gas, containing carbon monoxide (CO) and hydrogen gas (H₂). It is made by passing steam over a red-hot carbon fuel such as coke. The reaction between steam and hydrocarbons produce the gas mixture.