Question # 1

Water is considered pollutant when value of Do is

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6 PPM

8 PPM

03 PPM

10 PPM

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

Which one of the following is not air pollutant gas

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CO

CO₂

NO

SO₂

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

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

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Ozone is present in layer around earth:

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atmosphere

tropospher

stratosphere

thermosphere

Property due to which water acts as a universal solvent is

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Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

It is a biodegradable pollutant

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Salts of HG

DDt

Aluminum foil

Domestic fuel

Petroleum or crude oil is a complex mixture of compounds mainly:

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benzene

minerals

hydrocarbons

phenols

The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:

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Ionic bonding

Metallic bonding

Bridge bonding

H-bonding

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

Insoluble ferric oxide is produced in the pH range:

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1 to 8

6 to 9

3 to 13

8 to 13

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

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Neutralization

oxidizing agent

Reducing agent

Activating agent

In Purification of potable water the coagulant used is

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nickel sulpahte

copper sulpahte

barium sulphate

alum

Which of the following waster material is not recycled for use again

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paper

plastic

hides of animals

glass

Ozone in most of the tropical regions acts as a pollutant and cause

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damages to eyes

aggravates asthma

chest discomfort

all of these

Which of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

Poisoning of CO can be reveresed by giving oxygen at pressure:

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low

least

medium

High

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

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