91)

The salinity of ocean waters is calculated as the amount of salt (in gm) dissolved in _____ gm of seawater.

SSC CGL 2022

A)

1000

B)

100

C)

10,000

D)

10

92)

Which of the following is correctly paired?

SSC CGL 2022

A)

Cyanide ion - CN^-

B)

Fluoride ion - CI^-

C)

Ammonia - OH^-

D)

Bromide ion - F^-

93)

______ is the measure of the relative clarity of a liquid.

SSC CGL 2022

A)

Turbidity

B)

Conductivity

C)

Reduction

D)

Composting

94)

Ferrum is the Latin name for ______ .

SSC CGL 2022

A)

copper

B)

zinc

C)

iron

D)

nickel

95)

Which of the following is NOT a water pollutant?

SSC CGL 2022

A)

Glacier

B)

Silt

C)

Chromium

D)

Arsenic

96)

How many electrons are there in the outermost shell of a group 16 element?

SSC CGL 2022

A)

3

B)

4

C)

5

D)

6

97)

In the flocculation method of water treatment ______ chemical is added to water.

SSC CGL 2022

A)

positively charged

B)

low negatively charged

C)

electro-neutral

D)

high negatively charged

98)

Nitrogen is a ______ element.

SSC CGL 2022

A)

poly-atomic

B)

tetra-atomic

C)

diatomic

D)

monoatomic

99)

Ozone is a molecule made up of ______ oxygen atoms.

SSC CGL 2022

A)

one

B)

two

C)

four

D)

three

100)

What is the atomic mass of oxygen (expressed in ‘u’)?

SSC CGL 2022

A)

16

B)

8

C)

24

D)

32