1
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
A compound formed by elements X and Y crystallises in the cubic structure, where X atoms are at the corners of a cube and Y atoms are at the centre of the body. The formula of the compounds is
A
XY
B
XY2
C
X2Y3
D
XY3
2
WB JEE 2017
MCQ (Single Correct Answer)
+2
-0.5
In a close-packed body-centred cubic lattice of potassium, the correct relation between the atomic radius (r) of potassium and the edge-length (a) of the cube is
A
$$r = {a \over {\sqrt 2 }}$$
B
$$r = {a \over {\sqrt 3 }}$$
C
$$r = {{\sqrt 3 } \over 2}a$$
D
$$r = {{\sqrt 3 } \over 4}a$$
3
WB JEE 2016
MCQ (Single Correct Answer)
+1
-0.25
Ionic solids with Schottky defect may contain in their structure
A
cation vacancies only
B
cation vacancies and interstitial cations
C
equal number of cation and anion vacancies
D
anion vacancies and interstitial anions
WB JEE Subjects