Tag: threats to water resource

Questions Related to threats to water resource

The part of the sea which touches the land and is generally not so deep is called ______________.

  1. The high sea

  2. The continental shelf

  3. Isthmus

  4. Lake


Correct Option: B

The water of which of the following seas is most saline?

  1. Black Sea

  2. Dead Sea

  3. Baltic Sea

  4. Red Sea


Correct Option: B
Explanation:

With 33.7% salinity, the Dead Sea is one of the world's saltiest bodies of water. The Dead Sea is landlocked and in the lowest valley on earth. All the minerals of the surrounding countryside get washed into one pool, which in turn gets baked by the sun. This concentrates the salts so much that the Dead Sea is 10 times as salty as the ocean.

Which is most abundant element in sea water?

  1. Sodium

  2. Chlorine

  3. Iodine

  4. Potassium


Correct Option: A
Explanation:

The most abundant dissolved ions in seawater are sodium, chloride, magnesium, sulfate and calcium. Its osmolarity is about 1000 mOsm/l.

Which one of the following will not help in containing air pollution?

  1. Conservation of forests

  2. Expansion of agriculture

  3. Reducing vehicular emission

  4. Use of non-conventional sources of energy


Correct Option: B

Which one of the following causes air pollution?

  1. Carbon dioxide

  2. Ozone

  3. Oxygen

  4. Nitrogen


Correct Option: A

Air pollution according to origin are classified into ______________.

  1. primary pollutants

  2. secondary pollutants

  3. tertiary pollutants

  4. only A and B


Correct Option: D