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Q. No.The chain length of silicones can be controlled by adding:
1. \(\mathrm{CH_3SiCl_3}\)
2. \(\mathrm{SiCl_4}\)
3. \(\mathrm{(CH_3)_2SiCl_2}\)
4. \(\mathrm{(CH_3)_3SiCl}\)
1. \(\mathrm{CH_3SiCl_3}\)
2. \(\mathrm{SiCl_4}\)
3. \(\mathrm{(CH_3)_2SiCl_2}\)
4. \(\mathrm{(CH_3)_3SiCl}\)
Subtopic: Properties of Structure of SiO2 & Other Compounds |
68%
From NCERT
NEET - 2022
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Select the correct option based on the statements below:
| Assertion (A): | ICl is more reactive than I₂. |
| Reason (R): | I-Cl bond is weaker than I-I bond. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Group 17 - Preparation, Properties & Uses |
75%
From NCERT
NEET - 2022
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Incorrect statement among the following is:
| 1. | Quartz is extensively used as a piezoelectric material. |
| 2. | Silicones are a group of organosilicon polymers, which have (-R2SiO-) as a repeating unit. |
| 3. | Basic structural unit in silicates is the SiO44– tetrahedron. |
| 4. | Feldspars are not aluminosilicates. |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
74%
From NCERT
NEET - 2013
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Match the allotropes of cabon given in List I with the respective characteristics given in List II.
| List-I | List-II | ||
| A. | Coke | I. | Carbon atoms are sp3 hybridised. |
| B. | Diamond | II. | Used as a dry lubricant |
| C. | Fullerene | III. | Used as a reducing agent |
| D. | Graphite | IV. | Cage like molecules |
Choose the correct answer from the options given below:
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | IV | I | II |
| 2. | II | IV | I | III |
| 3. | IV | I | II | III |
| 4. | III | I | IV | II |
Subtopic: Compounds of Carbon, Preparations, Properties & Uses |
76%
From NCERT
NEET - 2023
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Select the element (M) whose trihalides cannot be hydrolysed to form [M(H2O)6]3+.
| 1. | Ga | 2. | In |
| 3. | Al | 4. | B |
Subtopic: Boron Family- Preparations, Properties & Uses |
75%
From NCERT
NEET - 2023
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In the light of the below statements, choose the correct answer from the options given below:
| Statement I: | Acid strength increases in the order given as HF < HCl < HBr < HI. |
| Statement II: | As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCI, HBr, and HI decreases and so the acid strength increases. |
| 1. | Statement I is correct and Statement II is incorrect |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Group 17 - Preparation, Properties & Uses |
81%
From NCERT
NEET - 2021
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The incorrect statement regarding diamond and graphite is-
| 1. | In diamond each carbon is sp2 hybridised and in graphite, each carbon is sp3 hybridised. |
| 2. | Diamond is an insulator |
| 3. | Graphite has a planar geometry. |
| 4. | Both (2) and (3) |
Subtopic: Structure & Properties of Allotropes of C |
77%
From NCERT
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Oxygen forms hydrogen bonds while chlorine does not, because :
| 1. | Chlorine has a bigger size and as a result, a higher electron density per unit volume. |
| 2. | Oxygen has a smaller size and as a result, a lower electron density per unit volume. |
| 3. | Oxygen has a smaller size and as a result, a higher electron density per unit volume. |
| 4. | Oxygen has a bigger size and as a result, a higher electron density per unit volume. |
Subtopic: Group 16 - Preparation, Properties & Uses |
74%
From NCERT
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Nitrogen exists as a diatomic molecule and phosphorus as P4 because on moving
| 1. | up a group, the tendency to form pπ−pπ bonds decreases. |
| 2. | down a group, the tendency to form pπ−pπ bonds decreases. |
| 3. | down a group, the tendency to form dπ−dπ bonds decreases. |
| 4. | up a group, the tendency to form dπ−dπ bonds decreases. |
Subtopic: Group 15 - Preparation, Properties & Uses |
78%
From NCERT
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Boric acid is polymeric due to-
1. Its acidic nature.
2. The presence of hydrogen bonds.
3. Its monobasic nature.
4. Its geometry.
Subtopic: Compounds of Boron- Preparations, Properties & Uses |
72%
From NCERT
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