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उत्तर : 2. "B"

प्र:

Read the following passage carefully and give the answer of following questions.

The problem of water pollution by pesticides can be understood only in context, as part of the whole to which it belongs – the pollution of the total environment of mankind. The pollution entering our waterways comes from many sources, radioactive wastes from reactors, laboratories and hospitals; fallout from nuclear explosions; domestic wastes from cities and towns; chemical wastes from factories. To these is a added a new kid of fallout - the chemical sprays applied to crop lands and gardens, forests and fields. Many of the chemical agents in this alarming melange initiate and augment the harmful effects of radiation, and within the groups of chemicals themselves there are sinister and little - understood interactions, transformations and summations of effect.

Ever since the chemists began to manufacture substances that nature never invented, the problem of water purification have become complex and the danger to users of water has increased. As we have seen, the production of these synthetic chemicals in large volume began in the 1940’s. It has now reached such proportion that an appalling deluge of chemical pollution is daily poured into the nation’s waterways. When inextricably mixed with domestic and other wastes discharged into the same water, these chemicals sometimes defy detection by the methods in ordinary use by purification plants. Most of them are so complex that they cannot be identified. In rivers, a really incredible variety of pollutants combine to produce deposits that sanitary engineers can only despairingly refer to as “gunk”.

Water contamination has become serious:

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  • 1
    since water pollution was difficult to assess.
    सही
    गलत
  • 2
    since nature has taken a hand in pollution.
    सही
    गलत
  • 3
    since chemists began to use new substances.
    सही
    गलत
  • 4
    since businessmen authorised the use of chemicals.
    सही
    गलत
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उत्तर : 3. "since chemists began to use new substances."

प्र:

Directions: In these questions, a part of the sentence is given in bold. Below are given alternatives to the bold part at ( A ), ( B ) and ( C ) which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (D).

It is time we leave.

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  • 1
    have to leave
    सही
    गलत
  • 2
    would leave
    सही
    गलत
  • 3
    left
    सही
    गलत
  • 4
    No improvement
    सही
    गलत
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उत्तर : 3. "left"

प्र:

Read the following passage carefully and give the answer of following questions.

The problem of water pollution by pesticides can be understood only in context, as part of the whole to which it belongs – the pollution of the total environment of mankind. The pollution entering our waterways comes from many sources, radioactive wastes from reactors, laboratories and hospitals; fallout from nuclear explosions; domestic wastes from cities and towns; chemical wastes from factories. To these is a added a new kid of fallout - the chemical sprays applied to crop lands and gardens, forests and fields. Many of the chemical agents in this alarming melange initiate and augment the harmful effects of radiation, and within the groups of chemicals themselves there are sinister and little - understood interactions, transformations and summations of effect.

Ever since the chemists began to manufacture substances that nature never invented, the problem of water purification have become complex and the danger to users of water has increased. As we have seen, the production of these synthetic chemicals in large volume began in the 1940’s. It has now reached such proportion that an appalling deluge of chemical pollution is daily poured into the nation’s waterways. When inextricably mixed with domestic and other wastes discharged into the same water, these chemicals sometimes defy detection by the methods in ordinary use by purification plants. Most of them are so complex that they cannot be identified. In rivers, a really incredible variety of pollutants combine to produce deposits that sanitary engineers can only despairingly refer to as “gunk”.

Water pollution can only be understand:

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    in relation to world contamination
    सही
    गलत
  • 2
    by the whole human race
    सही
    गलत
  • 3
    in context
    सही
    गलत
  • 4
    in relation to the number of pesticides that exist.
    सही
    गलत
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उत्तर : 1. "in relation to world contamination"

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