1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following is not true about the amorphous solids?

A
They may become crystalline on keeping for long time.
B
Amorphous solids can be moulded by heating.
C
They are anisotropic in nature.
D
On heating they may become crystalline at certain temperature.
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

Alkali halides do not show dislocation defect because

A
anions cannot be accommodated in vacant spaces
B
cations and anions have almost equal size
C
there is large difference in size of cations and anions
D
cations and anions have low coordination number
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

In chrysoberyl, a compound containing beryllium, aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy $$\frac{1}{4}$$th of octahedral voids. The formula of the compound is

A
$$\mathrm{BeAlO}_4$$
B
$$\mathrm{BeAl}_2 \mathrm{O}_4$$
C
$$\mathrm{Be}_2 \mathrm{AlO}_2$$
D
$$\mathrm{BeAlO}_2$$
4
KCET 2021
MCQ (Single Correct Answer)
+1
-0

The correct statement regarding defects in solid is

A
Frenkel defect is a vacancy defect
B
Schottky defect is a dislocation defect
C
Trapping of an electron in the lattice leads to the formation of F-centre
D
Schottky defect has no effect on density
KCET Subjects
EXAM MAP