Which of the following is wrong?

(1) Delhi leads the country in its level of air pollution

  • (3) In 1990s, Delhi rnked fourth among the 41 most polluted cities of the world

  • (2) Delhi has more cars than the states of Gujrat and West Bengal put together

  • 3

  • (4) PIL was file in High court against the Air pollution in Delhi

All the buses of Delhi were converted to run on CNG

  • Before the orders of Supreme court

  • By the end of 2002

  • In 1990

  • Under the act of environment in 1987

CNG is better than petrol and diesel

  • It burns more efficiently

  • Is left unburnt in very little amount

  • Cheaper

  • All of these

Problems with CNG as the only fuel for automobiles is

  • Difficulty in laying down pipelines for the distribution of CNG

  • Difficulty in ensuring uninterrupted supply

  • Can be siphoned off by thieves

  • Both A and B

Which of the following is actually associated with CNG

  • Cheaper

  • Cannot be adulterated

  • Burns more efficiently

  • All of these

Which of the following is not used for controlling air Pollution in Delhi?

  • Phasing out of old vehicle

  • Use of unleaded petrol

  • Use of low sulphur petrol and diesel

  • Use of electrostatic precipitator in Vehicles

What does the more stringent norms for fuel mean?

  • Reducing sulphur and aromatic content in petrol and diesel fuel

  • Reducing lead in petrol

  • Increasing CNG use

  • All of these

According to Euro III norms, Sulphur can be controlled at...a…... in diesel while to …b…... in petrol

  • a-50 ppm

  • a-150 ppm

  • b-150 ppm

  • a-200 ppm

Aromatic hydrocarbons should be 42 per cent of the concerned fuel. This was according to

  • Euro II Norms

  • Euro III Norms

  • Euro IV Norms

  • Euro I Norms

The goal according to roadmap is to reduce sulphur content to …….in petrol and diesel.

  • 42 per cent

  • 150 ppm

  • 50 ppm

  • 30 per cent

To safeguard our water resources, Government of India has passed the

  • Water (Prevention and Control of Pollution) Act in 1974

  • Water (Prevention and Control of Pollution) Act in 1981

  • Water (Prevention and Control of Pollution) Act in 1987

  • Water (Prevention and Control of Pollution) Act in 1990

How much amount of impurities are present in waste water which make it unfit for human use?

  • 0.01%

  • 0.1%

  • 0.2%

  • 2%

Biodegradable organic matter of domestic sewage is used as a substrate by

  • Bacteria and Other microbes

  • Industries

  • Lichens

  • All of these

Algal bloom is due to and results in:

  • Presence of large amount of nutrients in water

  • Excessive growth of free floating or planktonic algae

  • Distinct color to the water bodies

  • All of these

Water hyacinth

Find the odd one out

  • Eichhornia crassipes

  • Introduced in India for their lovely flowers

  • Have mauve colored flowers

  • Does not has any characteristic shape

Which of the following option is wrong about Water hyacinth?

  • World's most problematic weed

  • Terror of Bengal

  • Grow abundantly in eutrophic water bodies

  • Maintains a balance in the ecosystem dynamics of the water body

Sewage has heavy metals

  • Elements with density greater than 5g /cm3

  • Elements with density greater than 10g /cm3

  • Elements with density greater than 15g /cm3

  • Substances with density greater than 0.3g/cm3

Biomagnification is a well known phenomenon for

  • Mercury

  • DDT

  • Silver

  • Both A and B

Concentration of DDT in water is 0.003 ppb, what can be the most commonly seen concentration of DDT in zooplankton?

(2) 5 ppm

  • 4 ppb

  • (4) 2 ppm

  • 0.04 ppm

  • 4

Biomagnification of DDT in a fish eating bird can reach to

  • 20 ppm

  • 20 ppb

  • 25 ppb

  • 25 ppm

Why does biological magnification happen?

  • The toxic substances can be digested but are not metabolised by our body

  • The toxic substances can neither by digested nor be metabolised and just pass on to the next generation

  • The toxic substances causes genetic mutation that pass to next generation

  • Both B and C

High concentration of DDT directly disturbs

  • Calcium Metabolism in birds

  • Thinning of eggshell

  • Premature breaking of eggshell

  • Decline in bird population

The natural aging of a lake by nutrient enrichment of its water is called

  • Biomagnification

  • Eutrophication

  • Biopiracy

  • Biosystematics

when lake is young, the water is

  • Cold and clear

  • Warm and turbid

  • Cold and turbid

  • Warm and clear

Streams draining into the lake and introduce nutrients such as ………

(Young lake)

  • Nitrogen and Phosphorus

  • DDT and cadmium

  • DDT

  • Calcium

The animals which live in warm areas will prefer

  • A young lake

  • An old lake

  • Lake with no nutrients

  • Cannot be predicted

Large masses of floating Plants-Bog

Are found in

  • A young lake

  • An old lake

  • Nutrients are less

  • Cannot be predicted

The natural ageing of lake

  • Depends on climate

  • Depends on size of lake

  • May take thousands of years

  • All of these

The pollutants from man's activities can radically accelerate the ageing process of a lake known as

  • Cultural Eutrophication

  • Accelerated Eutrophication

  • Biomagnification

  • Both A and B

Which of the following is harmful for aquatic organisms?

  • Thermal wastewaters

  • Agricultural waste

  • Industrial waste

  • All of these

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