- 1(current)
Q. No.Enzymes are:
1. Biochemical catalysts.
2. Protein molecules of high molecular masses.
3. Both (1) and (2)
4. None of the above.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyShape 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following statements about enzyme catalysis is incorrect?
| 1. | Enzymes are mostly proteinous in nature. |
| 2. | Enzyme action is specific. |
| 3. | Enzymes are denaturized by ultraviolet rays at high temperatures. |
| 4. | Enzymes are least reactive at an optimum temperature. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHeterogeneous 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyKClO3 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.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA small amount of phosphoric acid can be used to prevent H2O2 decomposition. This an example of?
1. Neutralization
2. Negative catalysis
3. Positive catalysis
4. Catalytic poisoning
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe active species in Zeigler-Natta polymerisation of ethylene is:
1. AlCl3
2. Et3Al
3. H2C=CH2
4. Ti+3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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