Questions
The colour imparted by Co(II) compounds to glass is
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a
blue
b
green
c
yellow
d
red
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Correct option is A
Glass is an amorphous and transparent solid obtained by solidification of a mixture of silicates of different metalsOne of which is an alkali metalAddition of small amounts of transition metal salts to the glass mixture imparts colour to the glassFor example, addition of small amounts of Fe+3 , Fe+2 , Co+2 , Cr+3 and Mn+4 salts impartsYellow-brown , light blue , deep blue , green or violet colour respectivelySimilar Questions
Borax is used as a cleansing agent because on dissolving in water, it gives:
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