2SO2(g) + O2(g) is an example for heterogenous catalysis

87.       2SO2(g) + O2(g)   is an example for

(A) irreversible reaction

(B) heterogenous catalysis

(C) homogenous catalysis

(D) neutralisation reaction

Answer:: (B)

88.       30 cc of  HCl, 20 cc of  5 HNO3 and 40 cc of  NaOH solutions are mixed and the volume was made up to 1 dm3. The pH of the resulting solution is

(A) 1

(B) 3

(C) 8

(D) 2

Answer:: (D)

89.       5 moles of SO2 and 5 moles of O2 are allowed to react. At equilibrium, it was found that 60% of SO2 is used up. lf the partial pressure of the equilibrium mixture is one atmosphere. the partial pressure of O2 is

(A) 0.21 atm

(B) 0.41 atm

(C) 0.82 atm

(D) 0.52 atm

Answer:: (B)

90.       Which one of these is NOT TRUE for benzene?

(A) It forms only one type of monosubstituted product

(B) There are three carbon-carbon single bonds and three carbon-carbon double bonds

(C) Heat of hydrogenation of benzene is less than the theoretical value

(D) The bond angle between carbon-carbon bonds is 120°

Answer:: (B)

91.       Which one of the following is paramagnetic?

(A) N2

(B) NO

(C) CO

(D) O3

Answer:: (B)

92.       Which one of the following is a covalent crystal?

(A) Ice

(B) Rock salt

(C) Dry ice

(D) Quartz

Answer:: (D)

93.       Which one of the following DOES NOT involve coagulation?

(A) Formation of delta region

(B) Clotting of blood by the use of ferric chloride

(C) Peptization

(D) Treatment of drinking water by potash alum

Answer:: (C)