Question

16. Which statement is/are correct ?
a) At normal temperature IA group metals adopt a
A group metals adopt a body centred cubic type of lattice with a co-
oridnation number of eight
temperature lithium forms a henogonal close packed structure with a coordination
number of 12
c) Lithium is softer than the other metal but is harder than lead.
d) LiO2 and NaO2 are yellow but KO, is colourless
12th
correct statement from the following​

Answer 1

Answer:

A and C are correct statement

Answer 2

Statement B is correct

Explanation: Here are the correct statements and incorrect statements are explained why they are incorrect.

Statement A: Group A or 1 metal indeed adopts a solid form at normal temperature but with low melting points.

Statement B: A group of metals adopts a body-centered cubic type of lattice with a coordination number of eight, temperature lithium forms a hexagonal close-packed structure with a coordination number of twelve.

Statement C: Lithium is harder than sodium but softer than lead.

Statement D: Both Lithium superoxide(LiO₂) and potassium hydroxide( KO) have solid white color whereas Sodium peroxide (NaO₂)is yellow.