Question # 1

Heat balance of earth is maintained by

Choose an answer

Atmosphere

Hydrosphere

Lithosphere

Stratosphere

Soil remediation means

Choose an answer

to make it suitable for cultivation of crops

to make it acidic

to make it alkeline

to add manure into it

Lithosphere has amount of silicon

Choose an answer

35.30%

27.72%

40.01%

21.13%

NO and NO₂gases in atmosphere are represented by

Choose an answer

NO

NO₄

NO_x

N_xO_y

Which gas produces air pollution?

Choose an answer

oxides of sulphur

oxides of carbon

all of these

Chemicals used to kill insects are:

Choose an answer

Herbicides

Insecticides

Pesticides

Fungicides

Which step is unnecessary for purification of water for drinking purposes

Choose an answer

aeration

coagulation

treatment with chlorine

treatment with iodine

Agriculture consumes part of fresh water:

Choose an answer

1%

2%

69%

23%

Which of the following does not contribute towards the formation of photochemical smog?

Choose an answer

NO

SO₂

O₃

Hydrocarbons

The main pollution of leather tanneries in the waste is due to the salt of

Choose an answer

Chromium

Copper

Chromium

Lead

Which is the most toxic among the given?

Choose an answer

heavy metals

non-metals

Metals

Metalloids

0.1M HCI having pH =1.0 it is about 100 time stronger than acetic acid what will be the pH of acetic acid:

Choose an answer

0.1

1.3

2

3

How much quantity of water is in the domestic use

Choose an answer

0.08%

16%

24%

90%

BOD is the oxygen demand with in day(s):

Choose an answer

Four

Two

Three

Five

Dissolved impurities of potable water can be separated by the process of

Choose an answer

reduction

Aeration

Electrolysis

Co-angulation

Water which his considered to be safe for human consumption is known as

Choose an answer

distilled water

contaminated water

potable water

rain water

The ozone depletion in the stratophere is mainly due to the reaction of ozone with

Choose an answer

Freons

CFCs

Both A and B

None

The overall effect of the photochemical smog in the after noon is built up of

Choose an answer

Neutralization

oxidizing agent

Reducing agent

Activating agent

Ozone is most of the tropical regions acts as a pollutant and causes

Choose an answer

Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Chemicals used to kill pests are:

Choose an answer

Herbicides

Insecticides

Pesticides

fungicides

Water which forms scum with soap is called

Choose an answer

Hard water

Soft water

Distilled water

Un distilled water

More Classes

Other Links

MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer