HARD
12th CBSE
IMPORTANT
Earn 100

An excess of potassium ions makes crystals appear violet or lilac in colour since ________.
(a)some of the anionic sites are occupied by an unpaired electron.
(b)some of the anionic sites are occupied by a pair of electrons.
(c)there are vacancies at some anionic sites.
(d) are created which impart colour to the crystals.

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Important Questions on Solid State
MEDIUM
12th CBSE
IMPORTANT
The number of tetrahedral voids per unit cell in crystal is ________.

MEDIUM
12th CBSE
IMPORTANT
Amorphous solid can also be called ________.

HARD
12th CBSE
IMPORTANT
A perfect crystal of silicon is doped with some elements as given in the options. Which of these options show semiconductors?

HARD
12th CBSE
IMPORTANT
Which of the following statements are correct?

HARD
12th CBSE
IMPORTANT
Which of the following features are not shown by quartz glass?

HARD
12th CBSE
IMPORTANT
Which of the following cannot be regarded as molecular solid?

HARD
12th CBSE
IMPORTANT
In which of the following arrangements octahedral voids are formed?

MEDIUM
12th CBSE
IMPORTANT
Frenkel defect is also known as _____.
