Chemistry - Section 1 (10)

Directions to Solve

Chemistry - Section 1

73.

The molecules of which gas have highest speed?

A.	H2 at -73oC
B.	CH4 at 300 K
C.	N2 at 1,027oC
D.	O2 at 0oC

Answer: Option A

Explanation:

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74.

The metallurgical process in which a metal is obtained in a fused state is called

A.	smelting
B.	roasting
C.	calcinations
D.	froth floatation

Answer: Option A

Explanation:

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75.

The number of d-electrons in Fe²⁺ (Z = 26) is not equal to that of

A.	p-electrons in Ne(Z = 10)
B.	s-electrons in Mg(Z = 12)
C.	d-electrons in Fe(Z = 26)
D.	p-electrons in CI(Z = 17)

Answer: Option D

Explanation:

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76.

The metal used to recover copper from a solution of copper sulphate is

A.	Na
B.	Ag
C.	Hg
D.	Fe

Answer: Option D

Explanation:

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77.

The most electronegative element among the following is

A.	sodium
B.	bromine
C.	fluorine
D.	oxygen

Answer: Option C

Explanation:

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78.

The number of moles of solute present in 1 kg of a solvent is called its

A.	molality
B.	molarity
C.	normality
D.	formality

Answer: Option A

Explanation:

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79.

The nucleus of an atom consists of

A.	electrons and neutrons
B.	electrons and protons
C.	protons and neutrons
D.	All of the above

Answer: Option C

Explanation:

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