Free Environmental Issues (Weekly Quiz: 1) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Jhum cultivation.

1. Also called as slash and burn agriculture, is the farming practice in North-Eastern states of India.
2. Farmers cut down the trees of forest and burn the plant remains.
3. The ash is used as a fertiliser and the land is then used for farming or cattle grazing.
4. After cultivation, the land is left for several years, so as to allow its recovery.

Which of the statements given above are correct about Jhum cultivation?

(a) II, III and IV

(b) I, II and III

(c) I, III and IV

(d) I, II, III and IV

Question-2

In case $CO_{2}$ of earth's atmosphere disappears, the temperature of earth's surface would

(a) Decrease

(b) Increase

(c) Depend on oxygen concentration

(d) Remain the same

Question-3

Algal blooms impart a distinct colour to water due to

(a) excretion of coloured substances.

(b) their pigments.

(c) formation of coloured chemicals in water facilitated by physiological degradation of algae.

(d) absorption of light by algal cell wall.

Question-4

Match the following columns.

Column I	Column II
A. Eutrophication	1. UV-B radiaiton
B. Sanitary landfill	2. Deforestation
C. Snow blindness	3. Nutrient enrichment
D. Jhum cultivation	4. Waste disposal

Codes A B C D

(a) 1 3 4 2

(b) 3 4 1 2

(c) 2 1 3 4

(d) 1 2 4 3

Question-5

Among the following which one causes more indoor chemical pollution?

(a) Burning cooking gas

(b) Burning coal

(c) Burning mosquito coil

(d) Room spray

Question-6

Compressed Natural Gas (CNG) is

(a) methane

(b) propane

(c) ethane

(d) butane

Question-7

In 1984, Bhopal gas tragedy was caused due to leakage of

(a) methyl isocyanate

(b) potassium isocyanate

(c) sodium monoxide

(d) none of these.

Question-8

Thickness of ozone is more at

(a) poles

(b) equator

(c) mountains

(d) sea

Question-9

Which of the following statements are correctly showing the harmful effects of global warming?

1. The temperature of the earth has increased by 0.6°C in lastthree decades, which will lead to the change in precipitation patterns.
2. This rise in temperature will lead to the increased melting of polar ice caps which will cause the rise in sea level and many coastal areas will be submerged.
3. Increased temperature will lead to the decreased weed growth, eruption of diseases and pests. Thus, crop productivity will increase.

(a) I and III

(b) I and II

(c) II and III

(d) I, II and III

Question-10

Which method is used to remove particulate matter present in exhaust of thermal power plant?

(a) Absorption

(b) Wet scrubbers

(c) Electrostatic precipitator

(d) Gravitational method