Enzymes are:

1. Biochemical catalysts.

2. Protein molecules of high molecular masses.

3. Both (1) and (2)

4. None of the above.

Subtopic:  Catalyst |
 92%
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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.
Subtopic:  Catalyst |
 91%
From NCERT
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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

Subtopic:  Catalyst |
 85%
From NCERT
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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.

Subtopic:  Catalyst |
 84%
From NCERT
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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.

Subtopic:  Catalyst |
 57%
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