Question # 1

Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation

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AI

Hg

As

Cr(vi)

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Detergent greatly effects the

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Aquatic life

Modern life

Terrestrial life

Plants life

Photochemical smog consists of higher concentration of:

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Oxidants

Ozone

a & b

NO₃

Which is the most toxic among the given?

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heavy metals

non-metals

Metals

Metalloids

Which is the following is true about galvanic cell:

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Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

What is the morality of a solution containing 15g of urea is 500cm³ of solution?

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1M

0.5M

2M

1.5M

Water exist in only

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One state

Two state

Three states

4 states

Transformation is a cyclic process in which used plactic is

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Remelted and styrene is added

Converted into low quality substance

Converted back into original components

None of these

A single chloride free redical can destroy bow many ozene molecules?

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100

100000

10000

10

A pollutant affects

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Human affects

Quality of life

Functioning of ecosystem

All of these

The percentage of SO₂ produced by volcanoes is:

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47%

57%

67%

77%

Which gas is not a constituent of atmosphere?

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Xe

O₃

H₂

F₂

Chose a point which is not included in the components of environment

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Stratosphere

Hydrosphere

Lithosphere

Biosphere

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

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Biochemistry

Physically chemistry

Pharmaceutical chemistry

Environmental chemistry

Water is considered pollutant when value of Do is

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6 PPM

8 PPM

03 PPM

10 PPM

The layer of earth around the earth is called:

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Atmosphere

Hydrosphere

Lithosphere

Biosphere

The largest item which is recycled is

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newspaper

plastic

aluminium

oil

Ozone is a gas having boiling point

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Unstable

High

Low

Moderate

The respiration process taking place in animals depends on a difference in

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Partial pressure

Osomotic pressure

Vapour pressure

Atomospheric pressure

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