A visible change is observed when a strip of iron is placed in an aqueous solution of?
A. FeSO4 B. ZnSO4 C. CuSO4 D. MgSO4 Correct Answer: Option C C. CuSO4Which of the following compounds will leave a metal residue when heated?
A. Cu(NO3)2 B. AgNO3 C. K2CO3 D. CaCO3 Correct Answer: Option B B. AgNO3CuSO4.5H2O can be obtained from an aqueous solution of copper (ll) tetraoxosulphate (VI) by?
A. evaporation to dryness B. using chromatography C. precipitation D. crystallization Correct Answer: Option D D. crystallizationEqual amounts of marble chips are reacted separately with 100cm3 of hydrochloric acid of different concentrations. If all the marble chips reacted; which of the following remained the same in each case?
A. Average rate of evolution of gas B. Total mass of gas evolved during the reaction C. Time taken for the reaction to reach completion D. Initial reaction rates Correct Answer: Option B B. Total mass of gas evolved during the...Products
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