JEE Main · 2019 · 10 Jan 2019 · Shift 1 · Surface Chemistry

Which of the following is not an example of heterogeneous catalytic reaction?

(A)Ostwald's process
(B)Combustion of coal✓ Correct
(C)Hydrogenation of vegetable oils
(D)Haber's process

Answer: (B)

Solution

Heterogeneous catalysis needs the catalyst in a separate phase from the reactants, typically a solid speeding a gas reaction. Ostwald's process over platinum, the hardening of oils over nickel, and Haber's synthesis over iron all fit that picture. The burning of coal is just a direct oxidation with no separate catalyst phase, so it is the one that is not a heterogeneous catalytic reaction.

JEE Main · 2019 · 10 Jan 2019 · Shift 1 · Single correct option

Practise more: all JEE Main PYQs on Surface Chemistry →

More JEE Main questions on Surface Chemistry

The adsorbent used in adsorption chromatography is/are
A. silica gel
B. alumina
C. quick lime
D. magnesia

Choose the most appropriate answer from the options given below :
JEE Main 2024View solution →
Identity the incorrect pair from the following:
JEE Main 2024View solution →
For the adsorption of hydrogen on platinum, the activation energy is $30 kJ mol^{- 1}$ and for the adsorption of hydrogen on nickel, the activation energy is $41.4 kJ mol^{- 1}$ . The logarithm of the ratio of the rates of chemisorption on equ …
JEE Main 2023View solution →
The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ____

Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather.
JEE Main 2023View solution →
Coagulating value of electrolytes $AlCl_{3}$ and NaCl for $As_{2} S_{3}$ are 0.09 and 50.04 respectively. The coagulating power of $AlCl_{3}$ is $x$ times the coagulating power of NaCl . The value of $x$ is
____ :
JEE Main 2023View solution →
Ferric chloride is applied to stop bleeding because:
JEE Main 2023View solution →