As compared to shallow-wells, deep wells have______________?

Question: Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
[A].

paralysis of muscles & loss of appetite.

[B].

nervous depression.

[C].

gastritis & diarrhea.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Dissolved oxygen content in river water is around __________ ppm.
[A].

5

[B].

100

[C].

250

[D].

500

Answer: Option A

Explanation:

No answer description available for this question.

Question: Brown spots in fabrics will be caused by washing with water containing large amount of .
[A].

iron

[B].

zinc

[C].

iodine

[D].

bromine

Answer: Option A

Explanation:

No answer description available for this question.

Question: In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)
[A].

t = 15 – 0.0065h

[B].

t = 15 + 0.0065h

[C].

t = 0.0035h -15

[D].

t = 15 – 0.0035h

Answer: Option A

Explanation:

No answer description available for this question.

Question: Death may occur, when SO2 concentration in atmospheric air exceeds __________ ppm.
[A].

20

[B].

100

[C].

400

[D].

200

Answer: Option C

Explanation:

No answer description available for this question.

Question: Carbon monoxide is a pollutant, which causes
[A].

respiratory disease (e.g. asthma).

[B].

asphyxiation (suffocation) leading to death.

[C].

retardation in crop growth.

[D].

damage to building materials like marble.

Answer: Option B

Explanation:

No answer description available for this question.