11)

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

SSC CGL 2022

A)

oxygen

B)

hydrogen

C)

phosphorous

D)

nitrogen

12)

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

13)

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^-

14)

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

SSC CGL 2022

A)

Turbidity

B)

Conductivity

C)

Reduction

D)

Composting

15)

Ferrum is the Latin name for ______ .

SSC CGL 2022

A)

copper

B)

zinc

C)

iron

D)

nickel

16)

Which of the following is NOT a water pollutant?

SSC CGL 2022

A)

Glacier

B)

Silt

C)

Chromium

D)

Arsenic

17)

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

18)

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

19)

Nitrogen is a ______ element.

SSC CGL 2022

A)

poly-atomic

B)

tetra-atomic

C)

diatomic

D)

monoatomic

20)

Ozone is a molecule made up of ______ oxygen atoms.

SSC CGL 2022

A)

one

B)

two

C)

four

D)

three