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Q17) Ferric sulphate on heating gives ..[IIT 1978]




SOLUTION

Fe2(SO4)3 → Fe2O3 + 3SO3
Answer: (c)


Q18) When zinc reacts with dilute nitric acid it produces [ MP PMT 1985]




SOLUTION

4Zn + 10HNO3 → 4Zn(NO3)2 + NH4NO3 + 3H2O
Answer: (b)


Q19) Essential constituent of an amalgam is ..[ CPMT 1989]



SOLUTION


Answer:(d)



Q20) In the electrolytic purification of copper, some gold is found in the... [ CPMT 1972]



SOLUTION


Answer: (c)


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