Photo chemical smog formed in congested metropolitan cities mainly consists of ___________

(a)

Ozone, SO₂ and hydrocarbons

(b)

Ozone, PAN and NO₂

(c)

PAN, smoke and SO₂

(d)

Hydrocarbons, SO₂ and CO₂

Ozone depletion will cause ___________.

(a)

forest fires

(b)

eutrophication

(c)

bio magnification

(d)

global warming

Living in the atmosphere of CO is dangerous because it __________.

(a)

Combines with O₂ present inside to form CO₂

(b)

Reduces organic matter of tissues

(c)

Combines with haemoglobin and makes it incapable to absorb oxygen

(d)

Dries up the blood

Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be ______.

(a)

highly polluted

(b)

poor in dissolved oxygen

(c)

rich in dissolved oxygen

(d)

low COD

Assertion (A) : Excessive use of chlorinated pesticide causes soil and water pollution.
Reason (R) : Such pesticides are non-biodegradable.
i) Both (A) and R are correct and (R) is the correct explanation of (A)
ii) Both (A) and R are correct and (R) is not the correct explanation of (A)
iii) Both (A) and R are not correct
iv) (A) is correct but( R) is not correct

(a)

Both (A) and R are correct and (R) is the correct explanation of (A)

(b)

Both (A) and R are correct and (R) is not the correct explanation of (A)

(c)

Both (A) and R are not correct

(d)

(A) is correct but( R) is not correct

Which of the following is responsible for acid rain?

(a)

CO₂

(b)

NO₂

(c)

CO₂

(d)

All of these

High concentration of lead in human blood damages ______________

(a)

Brain

(b)

Liver

(c)

Both (a) & (b)

(d)

Neither (a) nor (b)

Identify the secondary pollutant among the following

(a)

CO

(b)

O₃

(c)

Pb

(d)

CH₄

NO₂ and SO₂ have some properties in common. Which property shown by one of these compounds, but not by the other?

(a)

Forms acid

(b)

Is a reducing agent

(c)

Is soluble in water

(d)

is a it is used as a food-preservative

The layer of atmosphere which extends upto 10 km from sea level is called ______

(a)

Troposphere

(b)

Stratosphere

(c)

Ionosphere

(d)

Mesosphere

Which one of the following is not a property of classical smog?

(a)

Secondary pollutants play significant role

(b)

Occurs at low temperature

(c)

Contains SO₂

(d)

Dark brown coloured

Earth is protected from UV rays by ______________

(a)

N₂

(b)

O₂

(c)

SO₂

(d)

O₃

Statement I : Ozone depletion potential is maximum is CFC's
Statement II: CFC looses active chlorine

(a)

Both statement I and statement II are true and, statement II explains statement I

(b)

Both statement I and statement, II are true but statement II does not explain statement I

(c)

Statement I is true but statement II is false

(d)

Both statement I and II are false

Identify the component of photechemical smog which is not the common one.

(a)

Acrolein

(b)

Ozone

(c)

Peroxyacetyl nitrate

(d)

CFCs

Most common and commercial water pollutant is _____________

(a)

industrial waste

(b)

fertilizers

(c)

detergents

(d)

PCB's

Decomposition of organic matter through microbial activity is known as ____________

(a)

Eutrophication

(b)

Putrescibility

(c)

BOD

(d)

Stratification

Green chemistry means such reaction which __________

(a)

Study the reaction in plants

(b)

Are related to the depletion of ozone layer

(c)

Reduce the use and production of hazardous chemicals

(d)

Produce colour. during reactions

Statement I : Productivity of eutrophic lake is maximum.
Statement II : Cation is mainly due to adding of \(SO_{4}^{2-}\)and heavy metals

(a)

Both statement I and statement II are true and statement II explains statement I

(b)

Both statement I and statement II are true but statement II does not explain statement I

(c)

Statement I is true but statement II is false

(d)

Both statement I and II are false

Which of the following pair of oxides is responsible for acid rain?

(a)

SO₃ +NO₂

(b)

CO₂ + CO

(c)

N₂O + CH₄

(d)

O₂ + H₂

Which of the following is not a greenhouse gas?

(a)

CO

(b)

O₃

(c)

CH₄

(d)

Water vapours