CO has high affinity for haemoglobin.

Which of the following is an herbicide?

Dumping of sewage sludge into the sea is preferred and beneficial over dumping them into the land. State true or false.

Identify the correct method by which carbon dioxide is produced.

The maximum limit of which of the following in drinking water should be 50 ppb?

Plants always take in carbon dioxide and release oxygen.

Pick out the method employed for destroying large amounts of industrial wastes.

Identify the correct statement regarding negative soil pollution.