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Q121) German silver does not contain [ CPMT 1992]




SOLUTION


Answer: (d)


Q122) Near the top of the blast furnace used for the extraction of iron, the metal oxides are reduced to spongy iron by .. [ CPMT 1991]




SOLUTION


Answer: (b)


Q123) In the manufacture of iron from haematite, lime stone is added to acts as [ AIIMS 1991]



SOLUTION

CaCO3 → CaO(flux) + CO2
CaO(flux) + SiO2 (impurity) → CaSiO3
Answer:(a)



Q124) Addition of iron fillings to CuSO4 solution caused precipitation of Cu owing to the ..[CPMT 1990]



SOLUTION


Answer: (a)


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