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1. In the electrolytic refining of Zinc, ...............
A the impure metal is at the cathode.
B graphite is at the anode.
C acidified zinc sulphate is the electrolyte.
D the metal ion gets reduced at the anode.
2. The wave number of the spectral line in the emission spectrum of hydrogen will be equal to 8/9 times the Rydberg's constant if the electron jumps from...........
A n = 10 to n =1
B n = 3 to n =1
C n = 2 to n = 1
D n = 9 to n = 1

Consider the following gaseous equilibria with equilibrium constants K1 and K2 respectively.
The equilibrium constants are related as............

A 1
B 2
C 3
D 4
4. Enthalpy of vapourization of benzene is +35.3 kJ mol-l at its boiling point of 80°C. The entropy change in the transition of the vapour to liquid at its boiling point [in JK-1 mol-1] is ............
A -100
B -441
C +100
D +441

Which one of the following conversions involve change in both hybridization and shape?

A 1
B 2
C 3
D 4

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