Q:

The Most Important Ore of Aluminium is

A) Calamine	B) Monazite
C) Magnetite	D) Bauxite

Answer & Explanation Answer: D) Bauxite

Explanation:

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Q:

Answer the Following Puzzle.

Number Puzzles Questions and Answers

A) 16	B) 13
C) 97	D) 56

Answer & Explanation Answer: B) 13

Explanation:

In each circle, starting at the top left segment ,numbers increase, as you move clockwise,by 2 for the upper left circle,3 for the upper right, 4 for the lower right and 5 for the lower left

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Q:

What do you call elements with Atomic Number between 57 and 71?

Answer

'Rare earth'(They are all metals)

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Subject: General Science

10 4360

Q:

Solids have definite shapes.This is because

A) the forces of cohesion of the molecules within are very much less in them	B) the forces of cohesion are very large
C) the forces of adhesion are large	D) the forces of adhesion are less

Answer & Explanation Answer: B) the forces of cohesion are very large

Explanation:

Cohesion refers to attraction between molecules of the same kind while adhesion refers to attraction between different kinds of molecules

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Filed Under: Physics

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Q:

National Commission for Backward Classes was set up in

A) 1991	B) 1992
C) 1993	D) 1994

Answer & Explanation Answer: C) 1993

Explanation:

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Filed Under: General Awareness

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Q:

Why are hydrocarbons insoluble in water?

Answer

We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons.

Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent.

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Q:

Which half reaction correctly represents reduction?

A) Fe2+ + e- ---> Fe3+	B) Au3+ + 3e– ---> Au
C) Ag ---> Ag+ + e-	D) All of the above

Answer & Explanation Answer: B) Au3+ + 3e– ---> Au

Explanation:

A half reaction is either the oxidation or reduction reaction component of a redox reaction. A half reaction is obtained by considering the change in oxidation states of individual substances involved in the redox reaction.

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Q:

The type of fracture where bone is broken at several places

A) Complicated fracture	B) Green stick fracture
C) Impact fracture	D) Comminuted fracture

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