The 'Bhwh' climate of Koppen is found in which of the following ?

• Magnolia

• Thar desert

• Patagonia 

The mean sea - level pressure of the atmosphere decreases by half at the altitude by :

• 6km

• 8 km

• 10 km

• 12 km 

The fall in temperature in troposphere is known as : 

• Adiabatic rate

• Lapse rate

• Temperature rate

• Thermal loss

Hurricane carries which of the following Beaufort Number ?

• 9

• 10

• 11

• 12

Which one of the following atmospheric layers reflect radio waves that are transmitted from the earth and again back to the earth ?

• Mesosphere

• Ionosphere

• Troposphere

• Stratosphere

Which one of the following is devoid of atmosphere ?

• Mesosphere

• Stratosphere

• Magnetosphere

• Thermosphere

67.

ASSERTION (A) :Presence of CO₂ in the earth's atmosphere is essential.

REASON (R) : CO₂ can absorb heat.

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

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

• (A) is true , but (R) is false.

• (A) is false , but (R) is true.

• a-iv , b-ii , c-i , d-iii

• a-iii , b-i , c-ii , d-iv

• a-iii , b-ii , c-i , d-iv

• a-ii , b-i , c-iii , d-iv

ASSERTION (A) : Tropical cyclones have a life span of about one week time.

REASON (R) : They can produce low amount of rainfall due to low atmospheric pressure.

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

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

• (A) is true , but (R) is false,

• (A) is false , but (R) is false.

Which one of the following is essential for the formation of equatorial westerlies ?

• Large - scale earthquake over the equator .

• Shifting of trade winds towards poles .

• Shifting of polar easterlies towards equator .

• Large - scale forest - fire in the equatorial rain forest .