Enzymes are:
1. Biochemical catalysts.
2. Protein molecules of high molecular masses.
3. Both (1) and (2)
4. None of the above.
Shape selective catalysis is:
1. | Catalytic reaction depends upon the pore structure of the catalyst. |
2. | Catalytic reactions depend on the size of the reactant and the product molecules. |
3. | Both '1' and '2' |
4. | None of the above. |
Heterogeneous catalysis is shown in:
1. | \(2SO_{2}{(g)} \ + \ O_{2}{(g)} \ \xrightarrow[]{Pt(s)} \ 2SO_{3}{(g)}\) |
2. | \(4NH_{3}{(g)} \ + \ 3H_{2}{(g)} \ \xrightarrow[]{Fe(s)} \ 2NH_{3}{(g)}\) |
3. | \(Vegetable \ oil(l) \ + \ H_{2}(g) \ \xrightarrow[]{Ni(s)} \ Vegetable \ ghee(s)\) |
4. | All of the above |
KClO3 on heating decomposes into KCl and O2. If some MnO2 is added, the reaction goes much faster because:
1. MnO2 decomposes to give oxygen.
2. MnO2 provides heat by reacting.
3. Better contact is provided by MnO2
4. MnO2 acts as a catalyst.
The compound that acts as an inhibitor for knocking in the combustion of petrol is:
1. (C2H5)4Pb
2. Ni(CO)4
3. Both (1) and (2)
4. None of the above.