IIT-JEE-Chemistry-Final Revision Set No.44

1. A gas will approach ideal behaviour at :
(A) low temperature and low pressure
(B) low temperature and high pressure
(C) high temperature and low pressure
(D) high temperature and high pressure

2. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y– and 1 M Z– at 25 degrees C. If the reduction potential of Z < Y > X, then :
(A) Y will oxidize X and not Z
(B) Y will oxidize Z and not X
(C) Y will oxidize both X and Z
(D) Y will reduce both X and Z

3. The pH of 0.1 M solution of the following salts increases in the order :
(A) NaCl < NH3Cl < NaCN < HCl
(B) HCl < NH4Cl < NaCl< NaCN
(C) NaCN < NH4Cl < NaCl < HCl
(D) HCl < NaCl < NaCN < NH4Cl

4. For the chemical reaction 3X(g) + Y(g) <--> X3Y(g), the amount of X3Y at equilibrium is affected by :
(A) temperature and pressure
(B) temperature only
(C) pressure only
(D) temperature, pressure and catalyst

5. One mole of calcium phosphide on reaction with excess water gives :
(A) one mole of phosphine
(B) two moles of phosphoric acid
(C) two moles of phosphine
(D) one mole of phosphorus pentoxide

Source: 1999 JEE