Multiple Choice Questions

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Drinking of mineral water with very low level of pesticides (about 0.02 ppm) for long periods may:

  • produce immunity against mosquito

  • cause leukemia (blood cancer) in most people

  • cause cancer of the intestine

  • lead to accumulation of pesticide residues in body fat


D.

lead to accumulation of pesticide residues in body fat

Pesticides are poisonous. They harm more than just the pests at which they are targeted. They are toxic and their exposure can lead to number of health effects. It can lead to respiratory problems to cancer. 

Human body stores many pesticides in fat beforethey are removed from the body by the liver or kidneys. Pesticides are stored in fat and can build up in larger quantities in the bodies of older adults.


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A lake with an inflow of domestic sewage rich in organic waste may result in

  • drying of the lake very soon due to algal bloom

  • an increased production of fish due to lot of nutrients

  • death of fish due to lack of oxygen

  • increased population of aquatic food web organisms.


Assertion : Presently, the global atmosphere is warming up.

Reason : The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the earth.

  • If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

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

  • If Assertion is true but Reason is false.

  • If both Assertion and Reason are false


An artificial pacemaker is implanted subcutaneously and connected to the heart in patients

  • having 90% blockage of the three main coronary arteries

  • having a very high blood pressure

  • with irregularity in the heart rhythm

  • suffering from arteriosclerosis.


Minamata disease was caused due to the consumption of

  • sea food containing lot of cadmium

  • fish contaminated with mercury

  • oysters with lot of pesticide

  • sea food contaminated with selenium.


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Photochemical smog formed in congested metropolitan cities mainly consists of:

  • Hydrocarbons, ozone and SOx

  • Hydrocarbons, SO2 and CO2

  • Smoke, peroxyacetyl nitrate and SO2

  • Ozone, peroxyacetyl nitrate and NOx


The correct match of atmospheric gases is :

  • Nitrogen - 0.03%; Oxygen - 78.08%; Argon­ - 0.93%; CO2 - 20.95%

  • Nitrogen - 78.08%; Oxygen - 20.95%; Argon - 0.03%; CO2 - 0.03%

  • Nitrogen - 0.03%; Oxygen - 78.08%; Argon - 20.95%; CO2 - 0.93%

  • Nitrogen - 78.08%; Oxygen - 20.95%; Argon - 0.93%; CO2 - 0.03%


Assertion: Agricultural output increased several times after introduction of DDT.

Reason: DDT was the first insecticide used on a wide scale.

  • 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.


In almost all Indian metropolitan cities like Delhi, the major atmospheric pollutant(s) is/are:

  • suspended particulate matter (SPM)

  • oxides of sulphur

  • carbon dioxide and carbon monoxide

  • oxides of nitrogen


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Which of the following is the largest root parasite

  • Rafflesia

  • Monotrapa

  • Areuthobium

  • Pistia


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