Chemistry Test 35

Result

Chemistry Test 35

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Weekly Quiz Competition

Question 1
4 / -1

Percentages of free space in cubic close packed structure and in body centred packed structure are respectively

A
74% and 68%

B
48% and 26%

C
26% and 32%

D
32% and 48%

Solution

Percentage occupancy of cubic close packed structure and B.C.C lattice are 74% and 68% respectively.

So, percentage of free space is 26% and 32% respectively.
Question 2
4 / -1

Which one of the following substances has the highest proton affinity?

A
H₂O

B
H₂S

C
NH₃

D
PH₃

Solution

Proton affinity if means affinity for proton i.e., basicity NH₃-Nitrogne has pair of electron to donate as well as higher tendency to donate due to lower electronegativity. P is not suitable as that has large size.
Hence, option C is correct.
Question 3
4 / -1

Which polymer is used in the manufacture of paints and lacquers ?

A
Bakelite

B
Glyptal

C
Polypropene

D
Poly vinyl chloride

Solution

Glyptal is used in the manufacture of paints and lacquers.

Hence, option B is correct