Question : Ferrous sulphate is used in water treatment as a/an:

Option 1: oxidising agent

Option 2: reducing agent

Option 3: coagulant agent

Option 4: adsorbent

Question : The hardness of the water is commonly measured in terms of:

Option 1: calcium carbonate equivalents

Option 2: calcium sulphate equivalents

Option 3: magnesium carbonate equivalents

Option 4: magnesium sulphate equivalents

Question : Aluminium salt commonly used to stop bleeding is:

Option 1: Aluminium nitrate

Option 2: Aluminium sulphate

Option 3: Aluminium chloride

Option 4: Potash alum

Question : In a mixture of 25 litres, the ratio of acid to water is 4 : 1. Another 3 litres of water is added. The ratio of acid to water in the new mixture is:

Option 1: 5 : 2

Option 2: 2 : 5

Option 3: 3 : 5

Option 4: 5 : 3

Question : Which of the following is used in the treatment of cancer?

Option 1: Physiotherapy

Option 2: Chemotherapy

Option 3: Electrotherapy

Option 4: Psychotherapy

Question : The rapidly growing mass of phytoplankton covering the surface water of a lake or pond is known as:

Option 1: eutrophication

Option 2: water bloom

Option 3: water pollution

Option 4: water hyacinth