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Q 21.

Highest speed(gas) of the molecules is-

A)  N2 at 1,027oC
B)  CH4 at 300 K
C)  H2 at -73oC
D)  None of these
Answer & Explanation Answer: H2 at -73oC

Explanation:

C) H2 at -73oC

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MCQ Type: Chemistry

Q 22.

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

A)  p
B)  s-electrons in Mg(Z = 12)
C)  p-electrons in Ne(Z = 10)
D)  None of these
Answer & Explanation Answer: p

Explanation:

A)

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MCQ Type: Chemistry

Q 23.

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

A)  Normality
B)  Molality
C)  Molarity
D)  None of these
Answer & Explanation Answer: Molality

Explanation:

B) Molality

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MCQ Type: Chemistry

Q 24.

The most electronegative element is-

A)  Fluorine (F)
B)  Bromine (Br)
C)  Sodium (Na)
D)  None of these
Answer & Explanation Answer: Fluorine (F)

Explanation:

A) Fluorine (F)

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MCQ Type: Chemistry

Q 25.

Which of the following phenomenon is considered responsible for Global Warming?

A)  Monsoon
B)  Fire in coal mines
C)  Greenhouse effect
D)  None of these
Answer & Explanation Answer: Greenhouse effect

Explanation:

C)Greenhouse effect

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MCQ Type: Chemistry





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