Question

Match the solid substances given in Column A with their correct melting point given in Column B. Use their relative ionic bond strength as indicators of their melting points.

• KF = 858°C
• CaF2 = 1418°C
• CaO = 2898°C

The cubic cell with a coordination number of 12 is

.a. face-centred cubic

b. body-centred cubic

c. ZnS type

d. diamond type

e. simple cubic

Bronze is

a. a substitutional alloy of copper and zinc

b. an interstitial alloy of copper and zinc

c. an interstitial alloy of copper and tin

d. a substitutional alloy of copper and tin

Answer 1

The cubic cell with a coordination number of 12 is face centred cubic

Option a is correct

Bronze is a substitutional alloy of copper and tin

Option d is correct