For one mole of an ideal gas, increasing the temperature from 10°C to 20°C increases both the average kinetic energy and rms velocity, but not significantly.

201.    For one mole of an ideal gas, increasing the temperature from 10°C to 20°C ______.

(A) increases the rms velocity by times.

(B) increases the average kinetic energy by two times.

(C) increases both the average kinetic energy and rms velocity, but not significantly.

(D) increases the rms velocity by two times.

Answer:: (C)

203.      For the decomposition of a compound AB at 600 K, the following data were

obtained:

[AB] mol dm-3            Rate of decomposition of AB                                               in mol dm-3 s-1

0.20                           2.75 ´ 10-8

0.40                          11.0 ´ 10-8

0.60                          24.75 ´ 10-8

The order for the decomposition of AB is

(A) 1

(B) 2

(C) 1.5

(D) 0

Answer:: (B)

204.    For the four successive trANSition elements (Cr, Mn, Fe and Co), the stability of + 2 oxidation state will be there in which of the following order?

(A) Cr > Mn > Co > Fe

(B) Mn > Fe > Cr > Co

(C) Fe > Mn > Co > Cr

(D) Co > Mn > Fe > Cr

(At. nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Answer:: (B)

205.    For the reaction 2HI(g) Ý H2(g) + I2(g) - Q KJ , the equilibrium constant depends upon

(A) temperature

(B) pressure

(C) catalyst

(D) volume

Answer:: (A)