Question

5
Which of the following statement is not true
a) Over use of NPK fertilizers reduce protein content of wheat and grams
grown on that soil
b) Excess Potassium content in soil decreases vitamin C and carotene content
in vegetables and fruits
c) DDT and Gammaxene decompose readily in the environment
d) Forest and grasslands are an excellent binding material that keep
the soil intact and healthy.
6
One of the following pollutants causes reduction in intelligence
a) lead
b) Cadmium c) Arsenic d) None
Which of the following is a green house gas
a) Carbondioxide b) Carbon monoxide c) Methane d) all the above
8
The element that is abundantly present in the atmosphere
a) Nitrogen b Oxygen c) Carbondioxide d) Hydrogen​

Answer 1

Answer:

5. c)

6 c)

7. d)

8. a)

Explanation:

DDT is a synthetic chemical and doesn't degrade easily

arsenic is highly carcinogenic in nature

All the mentioned gas traps Infrared radiation of sun

Earth's atmosphere is 78% nitrogen.