Question
Define catalyst. Give two examples.

Answer

A substance which speeds up the rate of a reaction without itself being changed chemically in the reaction is called a catalyst. It helps to increase selectivity, minimise waste and reduce reaction time and energy demands. For example : Hydrogenation of oil the catalyst used are platinum or palladium, Raney nickel.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Write modification of expressions of colligative properties with the help of van’t Hoff factor.
The rate constant for the first order reaction is given by $\log _{10} k =14.34-1.25 \times 10^4 T$. Calculate activation energy of the reaction. ( $239.3 kJ / mol$ )
What will be the action of the mixture of sodium nitrite and dilute hydrochloric acid on :
$(a)$ Ethyl amine $(b)$ Aniline $(c)$ Triethyl amine?
Convert the following:
(i) Chlorobenzene to phenol (ii) Ethanal to ethanol (iii) Iodomethane to methoxy methane.
How is phenol (carbolic acid) prepared from chlorobenzene (Dow’s process)?###Write chemical reaction for the preparation of phenol from chlorobenzene.
Using the relationsip between $∆G^0$ of cell reaction and the standard potential associated with it, how will you show that the electrical potential is an intensive property ?
Construct a cell using standard hydrogen electrode and zinc electrode. Write its cell reaction and cell representation.
Calculate cell potential of a cell with $0.01\ M\ Zn ^{2+}$ ions. Standard potential of a cell is $+0.76 V$
What are the characteristics of ideal solutions ?
Write reactions to prepare ethanamine from
a. Acetonitrile
b. Nitroethane
c. Propionamide