HARD
Earn 100

Identify the following statements as true (T) or false (F), and select the correct option.

A. In the aquatic food chain, pesticides such as DDT are metabolised at higher trophic level.

B. Metals that have the density of 75 g/cm3 are called heavy metals.

C. Minamata disease is developed due to Hg pollution in water.

D. FOAM is a term related to the oil spill pollution.

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Important Questions on Environmental Issues

EASY
Among the following, the one that is not a greenhouse gas is:
EASY
Among the gases a-e, the gases that cause greenhouse effect are:
aCO2
bH2O
cCFCs
dO2
eO3
EASY
The maximum concentration of harmful chemicals is expected to be found in organisms
EASY
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
EASY
Which one of the following human activities has contributed as deforestation by northeastern sides of India?
EASY
The zone of atmosphere in which the ozone layer is:
EASY
In the stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
EASY
The highest DDT concentration in aquatic food chain shall occur in
EASY
Which of the following in sewage treatment removes suspended solids?
MEDIUM
Which of the following harmful radiation is absorbed by ozone layer of the stratosphere?
EASY
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers?
HARD
Define Greenhouse gases. Give any two examples. 
EASY
Montreal protocol was signed in 1987 for control of
MEDIUM
Define ‘deforestation’. Comment on its effects. 
EASY
Which, among grass, goat, tiger and vulture, in a food chain, will have the maximum concentration of harmful chemicals in its body due to contamination of pesticides in the soil?
EASY
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
EASY
An increase in the concentration of the toxicant at successive trophic levels is known as:
MEDIUM
Which of the following is not a benefit of organic farming?