11.

ASSERTION (A) : Tropical climates are of special geographical interest.

REASON (R) : Over 75% of the World's population inhabits between latitudes of 30°N to 30°S

• Both (A) and (R) are true and (R) is correct explanation of (A).

• Both (A) and (R) are true but (R) is not correct explanation of (A).

• (A) is true , but (R) is false.

• (A) is false , but (R) is true.

Which one of the following is the main energy source for the formation of thunderstorms ?

• Geothermal energy of the Earth

• Latent heat derived from condensed water vapour

• Large scale fossil fuel burning

• Formation of Ozone(O₃) hole

Which one of the followings is the correct average air mass density at the surface of the Earth ?

• 0.9 kg m^-3

• 1.2 kg m^-3

• 1.5 kg m^-3

• 0.7 kg m^-3

In which one of the following atmospheric layers the temperature decreases with height at an average rate of about 0.6°C per 100m ?

• Troposphere

• Stratosphere

• Thermosphere

• Ionosphere

Which one of the following was first to put forward the concept of "life form" among plants in 1934 ?

• A.S. Moffat

• R.H. Whittaker

• Christen Raunkiaer

• E.O. Box

• a-2 , b-3 , c-4 , d-1

• a-2 , b-3 , c-1 , d-4

• a-3 , b-2 , c-1 , d-4

• a-4 , b-3 , c-2 , d-1

• a-4 , b-2 , c-1, d-3

• a-2 , b-4 , c-1 , d-3

• a-2 , b-4 , c-3 , d-1

• a-3 , b-4 , c-2 , d-1

• a-3 , b-4 , c-2 , d-1

• a-3 , b-4 , c-1 , d-2

• a-4 , b-3 , c-2 , d-1

• a-1 , b-4 , c-2 , d-3

Which one of the following is the correct average slope angle of continental slope ?°

• 2° 

• 4°

• 6°

• 8°

Which one of the following is the main chemical composition of coral reefs ?

• MgCO₃ (Magnesium Carbonate)

• KCO₃ (Potassium Carbonate)

• NaCl (Sodium Chloride)

• CaCO₃ (Calcium Carbonate)