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Q377) A solution of copper sulphate is [ AFMC 2003]




SOLUTION

CuSO4 + 2H2O → Cu(OH)2 + H2SO4
Answer: (a)


Q378) Unpaired electrons in Ni2+ is /are .. [ kerala MEE 2003]




SOLUTION


Answer: (b)


Q379) MnO42- (1 mole) in neutral aqueous medium disproportionates to ..[ AIIMS 2003]



SOLUTION

3MnO42- + 4H+ → 2MnO42- + MnO2 +2H2O
Answer:(a)



Q380) Maximum amount of carbon is present in.... [ AFMC 2003]



SOLUTION

Caste iron contains about 3% carbon
Answer: (b)


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