MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryp-Block (group 13 and 14)Previous Year Questions
The colour imparted by Co(II) compounds to glass is (AIIMS 2006)
A.green
B.deep-blue✓ Correct
C.yellow
D.red
Explanation
On solidification of a mixture of silicates, glass is obtained which is an amorphous solid. If glass mixture is added by a small amount of transition metals, like , imparts deep blue or green colour respectively. Hence, the correct option is (b).
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