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Environmental Issues

Question
CBSEENBI12046949
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Assertion: Dimethyl mercury is a highly persistent pollutant that accumulates in food chains.

Reason: Mercury pollution is responsible for minamata.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.

Solution

B.

If both assertion and reason are true but reason is not the correct explanation of assertion

Mercury is an important toxic pollutant It is changed to water soluble dimethyl mercury which undergoes biomagnification, i.e., accumulates in the body oforganisms inhabiting in the water. Eating poisoned animals causes deformity known as minamata disease which is characterized by diarrhoea, impairment of various senses, numbness of lips, blurring of visior, mental dearrangement and death.

Some More Questions From Environmental Issues Chapter

The cause of acid rain is :

Which one of the following causes ozone depletion ?

What disease is caused due to consumption of fishes captured from water contaminated with mercury ?

Which one of the following is not a green-house gas ?

Which gas contributes the maximum in global warming ?

Fill in the blanks with suitable words :

1. Increase in concentration of soluble salts in the soil is called.........

2. Aforestation can check the advancement of......... .

3. DDT is a serious pollutant as it is a.........pollutant and undergoes......... .

4 .........plant has become a troublesome weed in agricultural fields.

5 .........are major aerosol pollutant present in jet aircraft emission.

Write “True” or “False” :

Coin one word for the following statements :

Discarded computer parts like monitors, key boards, mouse etc.

Coin one word for the following statements :
Degradation of organic waste by worms like red wigglers, white worms and earthworms.

Coin one word for the following statements :
Cleaning of vast areas covered by forests.

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