MEDIUM
JEE Main
IMPORTANT
Earn 100

Given below are two statements. One is labelled as
Assertion A and the other is labelled as Reason R.
Assertion A: Sharp glass edge becomes smooth on heating it up to its melting point.

Reason R: The viscosity of glass decreases on melting.

Choose the most appropriate answer from the options given below.

100% studentsanswered this correctly

Important Questions on Solid State

MEDIUM
JEE Main
IMPORTANT
The total number of octahedral void (s) per atom present in a cubic close packed structure is :
EASY
JEE Main
IMPORTANT
Which of the following arrangements shows the schematic alignment of magnetic moments of antiferromagnetic substance?
MEDIUM
JEE Main
IMPORTANT
The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are, respectively :
MEDIUM
JEE Main
IMPORTANT
An element has a face-centered cubic fcc structure with a cell edge of a. The distance between the centres of two nearest tetrahedral voids in the lattice is
EASY
JEE Main
IMPORTANT
A compound of formula A2B3 has the HCP lattice. Which atom forms the HCP lattice and what fraction of the tetrahedral voids are occupied by the other atoms?
EASY
JEE Main
IMPORTANT
Which primitive unit cell has unequal edge lengths abc and all axial angles different from 90o
MEDIUM
JEE Main
IMPORTANT
Atoms of element X form hcp lattice and those of element Y occupy 23 of its tetrahedral voids. The percentage of element X in the lattice is (Nearest integer)
MEDIUM
JEE Main
IMPORTANT
The distance between Na+ and Cl- ions in solid NaCl of density 43.1 gcm-3 is .....×10-10 m. (Nearest Integer)
(Given : NA=6.02×1023 mol-1)