81)

The process of waste water treatment is commonly called ______ treatment.

SSC CGL 2022

A)

pollutant

B)

sewage

C)

microbe

D)

bacteria

82)

The chemical formula of arsenic is:

SSC CGL 2022

A)

Ac

B)

As

C)

Ar

D)

An

83)

Which of the following compounds in petroleum can cause corrosion to parts of internal combustion engines and refineries?

SSC CGL 2022

A)

Calcium

B)

Potassium

C)

Sodium

D)

Sulphur

84)

What is the name of the compound having the formula CH₃CH₂OH?

SSC CGL 2022

A)

Chloroform

B)

Acetic acid

C)

Ethanol

D)

Methane

85)

A______ tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater (sewage) flows for basic treatment.

SSC CGL 2022

A)

flush

B)

pressure

C)

soap

D)

septic

86)

Which of the following is an example of monosaccharides?
A. Fructose B. Sucrose C. Starch D. Glucose

SSC CGL 2022

A)

Both B and C

B)

Both A and D

C)

Only C

D)

Only B

87)

Why is water fluoridation, which is the controlled adjustment of fluoride to public water supply, done?

SSC CGL 2022

A)

To prevent tooth decay

B)

To prevent vitamin deficiency

C)

To prevent eye disease

D)

To prevent bone disease

88)

Ozone is an allotrope of ______.

SSC CGL 2022

A)

nitrogen

B)

carbon dioxide

C)

oxygen

D)

hydrogen

89)

Urea, a commonly used nitrogen-based fertiliser, is prepared by the reaction between ammonia and ______.

SSC CGL 2022

A)

oxygen

B)

hydrogen

C)

carbon dioxide

D)

sulphur

90)

Acidic nature of soil is shown by high concentration of ______.

SSC CGL 2022

A)

oxygen

B)

hydrogen

C)

phosphorous

D)

nitrogen