When water was added to a white anhydrous substance X, th...
When water was added to a white anhydrous substance X, the colour changed to blue. X is
CuSO4
FeSO4
Na2SO4
PbSO4
Correct answer is A
When water is added to white coloured anhydrous copper sulphate, its colour changes to blue, indicating that the blue coloured copper sulphate pentahydrate is regenerated.
Naphthalene when heated melts at 354 K (81 oC). At this temperature the molecules of naphthalene...
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The salt formed from a weak acid and a strong base hydrolyzes in water to form ...
Which of the following elements would produce coloured ions in aqueous solution? ...
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A mixture of common salt, ammonium chloride and barium sulphate can best be separated by ...