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Q:

Quartz composed of which two elements

A) Iron and magnesium	B) Iron and oxygen
C) Oxygen and silicon	D) Silicon and iron

Answer & Explanation Answer: C) Oxygen and silicon

Explanation:

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Q:

Which of the following is present in the largest amount in terms of percent by mass in the earth's crust

A) Silicon	B) Oxygen
C) Carbon	D) Calcium

Answer & Explanation Answer: B) Oxygen

Explanation:

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Q:

If $3 x + 7 = x^{2} + p = 7 x + 5$ , what is the value of P ?

A) 17/2	B) 25/3
C) 33/4	D) 41/5

Answer & Explanation Answer: A) 17/2

Explanation:

$3 x + 7 = 7 x + 5 = > 7 x - 3 x = 2 = > 4 x = 2 = > x = 2$

Now, $3 x + 7 = x^{2} + p = \frac{3}{2} + 7 = \frac{1}{4} + p = > p = \frac{17}{2}$

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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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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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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

Explanation:

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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

Explanation:

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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

Explanation:

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