5.A white salt on heating decomposes to give brown fumes and a residue is left behind.
a) Name the salt.
b) Write the equation for the decomposition reaction.
7. A few drops of H2SO4 are added into water before electrolysis. Why?
8. Oil and fat containing food items are flushed with Nitrogen.Give reasons.
4. Explain why :
When blue salt of CuSO4 is heated it becomes colourless.

Question

5.A white salt on heating decomposes to give brown fumes and a residue is left behind.
a) Name the salt.
b) Write the equation for the decomposition reaction.
7. A few drops of H2SO4 are added into water before electrolysis. Why?
8. Oil and fat containing food items are flushed with Nitrogen.Give reasons.
4. Explain why :
When blue salt of CuSO4 is heated it becomes colourless.

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