- 1(current)
Q. No.Me3SiCl is used during polymerization of organ silicones because
| a. | Chain length of organic silicone polymers can be controlled by adding |
| b. | blocks the end terminal of silicone polymer. |
| c. | improves the quality and yield of the polymer. |
| d. | acts as a catalyst during polymerization. |
Choose the correct option:
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the species given in Column I with the hybridisation given in Column II.
| Column I | Column II |
| A. Boron in | i. sp2 |
| B. Aluminium in | ii. sp3 |
| C. Carbon in Buckminsterfullerene | iii. sp3d2 |
| D. Germanium in |
Codes:
| Options: | A | B | C | D |
| 1. | ii | iii | i | iii |
| 2. | i | i | iii | ii |
| 3. | iii | ii | ii | i |
| 4. | i | iii | ii | iii |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements:
| Assertion (A): | If aluminium atoms replace a few silicon atoms in three-dimensional network of silicon dioxide, the overall structure acquires a negative charge. |
| Reason (R): | Aluminium is trivalent while silicon is tetravalent. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySilicon has a strong tendency to form polymers like silicones. The chain length of silicone polymer can be controlled by adding
| 1. | 2. | ||
| 3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyQuartz is extensively used as a piezoelectric material, it contains-
| 1. | Pb | 2. | Si |
| 3. | Ti | 4. | Sn |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements:
| Assertion (A): | Silicones are water-repelling in nature. |
| Reason (R): | Silicones are organosilicon polymers, which have ( - R2SiO - ) as repeating units. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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