Surface Chemistry 611
1. In which of the following commercial processes a
catalyst is not used [CPMT 1989]
(a) Haber's process
(b) Deacon's process
(c) Solvay process
(d) Lead chamber process
2. A catalyst [IIT 1984; AFMC 1995; CBSE PMT 1995]
(a) Increases the average kinetic energy of
reacting molecules
(b) Increases the activation energy
(c) Alters the reaction mechanism
(d) Increases the frequency of collisions of
reacting species
3. The coagulation of 100 ml of a colloidal sol of gold
is completely prevented by addition of 0.25 g of a
substance `X' to it before adding 10 ml of 1%
NaCl
solution. The gold number of `X' is
(a) 0.25 (b) 25
(c) 250 (d) 2.5
4. Which one of the following is not a property of
hydrophilic sols [AIIMS 1983, 84]
(a) High concentrations of dispersed phase can be
easily attained
(b) Coagulation is reversible
(c) Viscosity and surface tension are about the
same as for water
(d) The charge of the particle depends on the
pH
values of the medium; it may be positive,
negative or even zero
5. Peptising agent is
(a) Always an electrolyte
(b) Always a non-electrolyte
(c) Electrolyte or non-electrolyte
(d) A lyophilic colloid
6. The catalyst used in the manufacture of methanol
from water gas is [MP PET 2002]
(a)
52OV
(b) Ni + Mo
(c) ZnO +
32OCr
(d) Pt + W
7. Organic catalysts differ from inorganic catalysts
[AFMC 1989]
(a) By acting at very high temperature
(b) By acting at low temperature
(c) Being used up
(d) Being proteinous in nature
8. Commercial detergents mainly contain[CPMT 1993]
(a)
RCOONa
(b)
RONa
(c)
RSNa
(d)
NaROSO2
9. In which of the following processes shape-
selective catalysis is occurring [MP PET 1994]
(a) Conversion of alcohol to gasoline
(b) Synthesis of methanol from
CO
and
2
H
(c) Polymerisation of ethylene
(d) Synthesis of ammonia
10. Which one of the following is used for reviving
the exhausted permutite [EAMCET 2003]
(a) HCl solution
(b)
2
%10 CaCl
solution
(c) 10%
2
MgCl
solution
(d) 10% NaCl solution
11. The ability of a catalyst to accelerate the chemical
reaction is known as [CPMT 2000; KCET 2000]
(a) Selectivelty
(b) Activity
(c) Negative catalyst
(d) None of these
12.
3
AlCl
, in reactions, acts as [MADT Bihar 1983]
(a) Oxidizing agent
(b) Reducing agent
(c) Acid catalyst
(d) None of these
13. On addition of one ml of 10% NaCl solution to 10
ml gold sol in the presence of 0.25 gm of starch.
The coagulation is just prevented, starch has gold
number [MP PET 2004]
(a) 0.025 (b) 0.25
(c) 2.5 (d) None
14. Milk is an example of
[MP PET 20 01; JIPMER 2002; MP PMT 2002,04]
(a) Pure solution
