A strip of copper is placed in four different colourless salt solution. The salt solutions are NaNO3, Zn(NO3)2 , Mg(NO3)2, , AgNO3 Which one of the solution will finally turn blue
(1) AgNO3 (2) Zn(NO3)2 (3) Mg(NO3)2 (4) NaNO3
Which of the following pair of reactants can undergo displacement reaction under appropriate conditions ?
(1) MgSO4 + Fe (2) ZnSO4 + Fe (3) MgSO4 + Pb (4) CuSO4 + Fe
Which of the following salts false to give brown gas on heating? (1) Lead nitrate (2) Lithium nitrate (3) Magnesium nitrate (4) Postassium nitrate
When a student put some copper turnings in a colourless solution, he observed that the solution gradually turned blue. The solution is most likely to be (1) Ferrous sulphate solution (2) Magnesium nitrate solution (3) Silver nitrate solution (4) Copper sulphate solution
The addition of oxygen to a substance is called (1) Redox (2) Oxidation (3) Reduction (4) None of these
Aquaregia can dissolve gold because (1) it contains an oxidant conc. H2SO4 (2) It is 3 : 1 mixture of conc. HNO3 and conc. HCl (3) It contains a strong reducing agent (4) It contains nascent Cl
