Solution of NCERT Class XII Exercises Question Number 1.3

1. Class XII CHEMISTRY
Unit 1 SOLID STATE
NCERT EXERCISES QUESTION AND ANSWER
PGT CHEMISTRY
A.K.GUPTA
KENDRIYA VIDYALAYA SANGATHAN
ZONAL INSTITUTE OF EDUCATION AND TRAINING
BHBANESWAR
DIRECTOR
L.CHARI

2. Q 1.3-Classify each of the following solids as ionic, metallic, molecular, network
(covalent) or amorphous.
(i) Tetra phosphorus decoxide (P4O10) (ii) Ammonium phosphate (NH4)3PO4 (iii)
SiC (iv) I2 (v) P4 (vi) Plastic (vii) Graphite (viii) Brass (ix) Rb
(x) LiBr (xi) Si
Ans:
Ionic: Ammonium phosphate (NH4)3PO4 and LiBr
Metallic :Brass, Rb
Molecular: Tetra phosphorus decoxide (P4O10) , I2 , P4
Network covalent: Graphite, SiC, Si,
Amorphous: Plastic