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Q. No.Identify the incorrect statement from the following:
1.
The acidic strength of HX (X=F, Cl, Br and I) follows the order: HF > HCI > HBr >HI
2.
Fluorine exhibits - 1 oxidation state whereas other halogens exhibit +1, +3, +5 and +7 oxidation states also.
3.
The enthalpy of dissociation of F2 is smaller than that of Cl2.
4.
Fluorine is stronger oxidising agent than chlorine.
Subtopic: Group 17 - Preparation, Properties & Uses |
71%
Level 2: 60%+
NEET - 2024
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Subtopic: Group 16 - Preparation, Properties & Uses |
70%
Level 2: 60%+
NEET - 2024
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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%
Level 2: 60%+
NEET - 2023
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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%
Level 2: 60%+
NEET - 2023
Hints
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 |
73%
Level 2: 60%+
NEET - 2013
Hints
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. | \(\mathrm{(CH_3)_3SiCl}\) |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
67%
Level 2: 60%+
NEET - 2022
Hints
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 |
74%
Level 2: 60%+
NEET - 2022
Hints
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%
Level 1: 80%+
NEET - 2021
Hints
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%
Level 2: 60%+
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Links
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%
Level 2: 60%+
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