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Q:

River _______ is called 'The Sorrow of the Bengal'

A) Sone B) Damodar
C) Hooghly D) Kosi
 
Answer & Explanation Answer: B) Damodar

Explanation:

It rises in the hills of the Chhota Nagpur plateau and joins Hooghly after covering 22000 sq km. Its fury has been brought under control by DVC (Damodar Valley Corporation).

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Filed Under: Indian Geography

Q:

The glacier of the Nubra Valley, the longest one with a length of over 72km is called the ______ glacier

A) Hispar B) Siachen
C) Biafo D) Baltaro
 
Answer & Explanation Answer: B) Siachen

Explanation:

Hispar and Beturaof the Hunza valley are over 57km long. They are the largest glaciers. Biafo and Baltaro of the shigar valley are 60 km long

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Filed Under: Indian Geography

Q:

Which of the following physiographic feature of India is geologically the oldest?

A) Himalayan Mountain Chain B) Indus- Ganga Brahmaputra plain
C) The Peninsular Plateau D) The Coastal Plains
 
Answer & Explanation Answer: C) The Peninsular Plateau

Explanation:

It is composed of Archaean gneisses and schists

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Filed Under: Indian Geography

Q:

The phenomenon of summer sleep by animals is called

A) hibernation B) aestivation
C) laziness D) lethargy
 
Answer & Explanation Answer: B) aestivation

Explanation:

Aestivation is summer sleep. Many organisms like the snails do not find it comfortable in summer. They withdraw and lead a life with reduced BMR (basic Metabolic Rate) in a state of  dormancy.

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Filed Under: Biology

Q:

The grouping of blood is based on substances called 

A) antibodies B) antigens
C) antitoxin D) enzymes
 
Answer & Explanation Answer: B) antigens

Explanation:

The red blood corpuscles  or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.

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Filed Under: Biology

Q:

Organisms which synthesise their own food are called

A) autotrophs B) heterotrophs
C) auxotrophs D) saprotrophs
 
Answer & Explanation Answer: A) autotrophs

Explanation:

Autotroph: This term means organisms that synthesise their own food. Troph means feeding. Auto means self. The green plants which synthesise their own food are called autotrophs. All others which depend upon the plants directly or indirectly are called heterotrophs.

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Filed Under: Biology

Q:

Organisms that feed on the excreta of other organisms are called 

A) autotrophs B) heterotrophs
C) coprophagous D) saprotrophs
 
Answer & Explanation Answer: C) coprophagous

Explanation:

The word coprodaeum refers to the last part of the elimentary canal.The excreta (undigested, matter) comes out of that part. So, the organisms that take in such materials are called coprophagous.

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Filed Under: Biology

Q:

Which of the following is called 'the King of Chemicals' ?

A) Nitric acid B) Hydrochloric acid
C) Silver nitrate D) Sulphuric acid
 
Answer & Explanation Answer: D) Sulphuric acid

Explanation:

Sulphuric acid is called the King of Chemicals because it is used in the preparation of a very large number of other useful chemicals such as hydrochloric acid, nitric acid, dyes, drugs etc. In fact the annual production of shulpuric acid in a country is a measure of the economy of the country.

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Filed Under: Chemistry