Chemistry Test 8

Result

Chemistry Test 8

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following hydrogen bonds is the strongest?

A
O — H …. O

B
O — H …… F

C
O — H ….. N

D
F — H ....... F

Solution

Higher the electronegative difference between the two atoms, stronger will be the bond formed between them. Among the given compounds, electronegative difference between the hydrogen and fluorine is the maximum. Hence, the hydrogen bond in HF is the strongest.
Question 2
4 / -1

If liquids A and B from an ideal solution the

A
enthalpy of mixing is zero

B
entropy of mixing is zero

C
free energy of mixing is zero

D
free energy as well as the entropy of mixing are each zero

Solution

Ideal solution Δh = 0

ΔV = 0

F_A–A = F_B––B = F_A–B

Hence, option A is correct.
Question 3
4 / -1

The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence

A
SiX₂ << GeX₂ << SnX₂ << PbX₂

B
PbX₂ < < SnX₂ << GeX₂ << SiX₂

C
GeX₂ << SiX₂ << SnX₂ << PbX₂

D
SiX₂ << GeX₂ << PbX₂ << SnX₂

Solution

Due to inert pair effect, the stability of +2 oxidation state increases as we move down this group.

SiX₂ << GeX₂ << SnX₂ << PbX₂

Hence, option A is correct.