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Q:

' Mohs scale ' is used to indicate the

A) degree of brittleness of a substance B) degree of hardness of mineral
C) degree of viscosity of a liquid D) degree of elasticity of a material
 
Answer & Explanation Answer: B) degree of hardness of mineral

Explanation:
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Filed Under: World Geography

Q:

If 2 tables and 3 chairs cost Rs, 3500 and 3 tables and 2 chairs cost Rs. 4000, then how much does a table cost ?

A) 500 B) 1000
C) 1500 D) 2000
 
Answer & Explanation Answer: B) 1000

Explanation:

Let the cost of a table and that of a chair be Rs. x and Rs, y respectively.

Then, 2x + 3y = 3500 ...(i)

and 3x + 2y = 4000 .....(ii)

solving (i) and (ii) we get x = 1000, y = 500 

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Filed Under: Simplification

Q:

The upper part of the mantle upon which the crust of the earth floats is called

A) Barysphere B) Mesosphere
C) Mohorovic discontinuity D) Asthenosphere
 
Answer & Explanation Answer: D) Asthenosphere

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Filed Under: World Geography

Q:

The mapping of which of the following is most difficult

A) Mountains B) Plateau and Plains
C) Interior of the earth D) Oceans and their depth
 
Answer & Explanation Answer: C) Interior of the earth

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Filed Under: World Geography

Q:

Which of the following layers of the earth is believed to have the heavist mineral materials of highest density

A) Central core B) Crust
C) Mantle D) Both (B) and (C)
 
Answer & Explanation Answer: A) Central core

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Filed Under: World Geography

Q:

Eclipses occur due to which optical phenomena

A) Reflection B) Refraction
C) Rectilinear propagation D) Diffraction
 
Answer & Explanation Answer: C) Rectilinear propagation

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Filed Under: World Geography

Q:

What is the time taken by the Earth to complete one rotation on its imaginary axis

A) 24 hr 37 min 23 sec B) 24 hr
C) 23 hr 56 min 4 sec D) 23 hr 52 min
 
Answer & Explanation Answer: C) 23 hr 56 min 4 sec

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Filed Under: World Geography

Q:

The difference in the duration of day and night increases as one moves from

A) West to East B) East and west of the prime meridian
C) Poles to equator D) Equator to poles
 
Answer & Explanation Answer: D) Equator to poles

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Filed Under: World Geography