(a) Why does presence of excess of lithium makes $L i C l$ crystals pink?
(b) A solid with cubic crystal is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body centre. What is the formula of the compound?

Open in App

Solution

a. The presence of metal excess defects results due to presence of electrons at the position of negative ions which results in generation of F-centre and the $L i C l$ crystal becomes pink.
b. Effective P atom = 1
Effective Q atom = $\frac{1}{8} \times 8 = 1$
So, formula of the compound is PQ.

Suggest Corrections

Similar questions

Q. A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body-centre. What is the formula of the compound? What are the coordination numbers of P and Q?

Q. A cubic solid is made up of two elements

P

and

Q .

Atoms of

P

are present at the corners of the cube and atoms of

Q

are present by body centre. What is the formula of the compound and what are coordination number of

P

and

Q

A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body-centre. What is the formula of the compound? What are the coordination numbers of P and Q?

Q. A cubic solid made up of two elements

P

and

Q

P

are at corners,

Q

are at edge centers and Body Centers. Predict formula of the compound.

Join BYJU'S Learning Program

(a) Why does presence of excess of lithium makes LiCl crystals pink?(b) A solid with cubic crystal is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body centre. What is the formula of the compound?

a. The presence of metal excess defects results due to presence of electrons at the position of negative ions which results in generation of F-centre and the LiCl crystal becomes pink.b. Effective P atom = 1Effective Q atom =18×8=1So, formula of the compound is PQ.

(a) Why does presence of excess of lithium makes $L i C l$ crystals pink?
(b) A solid with cubic crystal is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body centre. What is the formula of the compound?

a. The presence of metal excess defects results due to presence of electrons at the position of negative ions which results in generation of F-centre and the $L i C l$ crystal becomes pink.
b. Effective P atom = 1
Effective Q atom = $\frac{1}{8} \times 8 = 1$
So, formula of the compound is PQ.