Calcium ammonium nitrate (CAN) is a popular nitrogen fertilizer because it is:

• slow supplier of nitrogen
• having more percentage of nitrogen in it
• fixing the nitrogen in the soil
• capable of making the soil acidic
Correct Option: A  [ slow supplier of nitrogen ]

Remark:

Which period is referred to as the period of population explosion ?

• Pre 1921 period
• 1921 - 1951 period
• 1951 - 1981 period
• Post 1981 period
Correct Option: C  [ 1951 - 1981 period ]

Remark: The decades 1951-1981 are referred to as the period of population explosion, which was caused by a rapid fall in the mortality rate but a high fertility rate of population in the country.

The channel separating the Andaman Island from the Nicobar Islands is known as

• Coco channel
• 10° channel
• Duncan passage
• Somboraro channel
Correct Option: B  [ 10° channel ]

Remark: The Andamans and Nicobars are separated by a channel (the Ten Degree Channel) some 150 km wide.

Gulf of Mannar is located in __________

• Arabian Sea
• Pacific Ocean
• Indian Ocean
• Atlantic Ocean
Correct Option: C  [ Indian Ocean ]

Remark:

Which of the following industries is called the basic industry ?

• Iron and Steel
• Electronics
• Petro-chemical
• Engineering
Correct Option: A  [ Iron and Steel ]

Remark:

Gaddis are tribes of :

• Rajasthan
• Kerala
• Arunachal Pradesh
• Himachal Pradesh
Correct Option: D  [ Himachal Pradesh ]

Remark:

Lignite is a type of:

• Iron ore
• Copper
• Coal
• Limestone
Correct Option: C  [ Coal ]

Remark:

Pisci culture development is related to :

• Blue revolution
• Green revolution
• White revolution
• Grey revolution
Correct Option: A  [ Blue revolution ]

Remark:

McMahon Line demarcates the boundary between :

• India and Pakistan
• India and Nepal
• India and China
• India and Bangladesh
Correct Option: C  [ India and China ]

Remark:

Leaves of which of the following plants are not used for the rearing of silkworms?

• Mulberry
• Castor
• Oak
• Teak
Correct Option: B  [ Castor ]

Remark: