CBSE 10th Standard Science Subject Chemical Reactions and Equations HOT Questions 3 Mark Questions With Solution 2021
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CBSE 10th Standard Science Subject Chemical Reactions and Equations HOT Questions 3 Mark Questions With Solution 2021
10th Standard CBSE
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Reg.No. :
Science
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Give six uses of decomposition reaction.
(a) -
Mohan took pure water for the electrolytic decomposition of water but did not see any bubble near the electrodes. Explain why?
(a) -
A teacher took few crystals of sugar in a dry test tube and heated the test tube over flame. The colour of sugar turned black. Explain why?
(a) -
Blue crystals of copper sulphate on heating in a dry test tube become colourless. Give reasons.
(a) -
FeSO4.7H2O, green colour crystals on heating, changes colour. Why?
(a)