HARD
Earn 100

Define selectivity of a solid catalyst. Give an example.

Important Questions on Surface Chemistry

HARD
Give two examples for heterogeneous catalysis.
MEDIUM
In the reaction, H2O2aqI-aqH2Ol+12O2g iodide ion acts as:
EASY
Which one of the following statements is incorrect about enzyme catalysis?
MEDIUM
Which one of the following is an example for homogenous catalysis?
MEDIUM
What is shape-selective catalysis? Describe some features of catalysis by zeolites.
EASY

When any solid substance is kept in contact with liquid or gas, then liquid or gas are more adsorbed on the surface of solid rather than bulk. The process is known as adsorption. It is different from absorption. Many gaseous reactions occur in the presence of solid catalyst. Catalyst is a chemical substance which change the rate of reaction without undergoing itself change. This phenomenon is known as catalysis.
Write any chemical equation of heterogeneous catalysis.

EASY
Which of the following is an example of homogeneous catalysis?
EASY
An example for homogeneous catalysis is
EASY
Explain the following in context of solid catalysts: Activity.
EASY
Explain the following in context of solid catalysts: Selectivity.
EASY
Which of the following is a character of catalyst?
EASY
Give reasons for the following: Catalyst is more effective as powdered state
EASY
Which of the following statements about enzymes is not correct?
MEDIUM

Match List-I with List-II

  List-I (process)   List-II (catalyst)
(a) Deacon's process (i) ZSM-5
(b) Contact process (ii) CuCl2
(c) Cracking of hydrocarbons (iii)  Ni
(d) Hydrogenation of vegetable oils (iv) V2O5

Choose the most appropriate answer from the options given below-

EASY
___ acts as a negative catalyst in the decomposition of H2O2.
EASY
Giving examples, define homogeneous catalysis.
MEDIUM
The catalyst used in the hydrogenation of oil is
EASY
Match the catalysts (Column I) with products (Column II)
  Column I   Column II
  Catalyst   Product
A. V2O5 P. Polyethylene
B. TiCl4/AlMe3 Q. Ethanal
C. PdCl2 R. H2SO4
D. Iron Oxide S. NH3
EASY
What do you mean by selectivity of a catalyst?
EASY
CO(g) and H2(g) react to give different products in the presence of different catalysts. Which ability of the catalyst is shown by these reactions?