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Q. No.
Assertion (A):
C3O2 is a linear structure.
Reason (R):
Each C atom in C3O2 is sp hybridized.
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.
Both (A) and (R) are false.
Subtopic: Hybridisation |
77%
Level 2: 60%+
Hints
Identify the incorrect statement among the following options:
| 1. | \(O^+_2\) ion is diamagnetic. |
| 2. | The bond orders of \(O_2^{+},O_2,O^-_2\) and \(O_2^{2-}\) are 2.5, 2, 1.5, and 1, respectively. |
| 3. | \(C_2\) molecule has four electrons in its two degenerate \(\pi \) molecular orbitals. |
| 4. | \(H^+_2 \) ion has one electron. |
Subtopic: M.O.T |
79%
Level 2: 60%+
NEET - 2022
Hints
Amongst the following, which one will have maximum 'lone pair - lone pair' electron repulsions?
1. \(\mathrm{XeF_2}\)
2. \(\mathrm{CIF_3}\)
3. \(\mathrm{IF_5}\)
4. \(\mathrm{SF_4}\)
1. \(\mathrm{XeF_2}\)
2. \(\mathrm{CIF_3}\)
3. \(\mathrm{IF_5}\)
4. \(\mathrm{SF_4}\)
Subtopic: V.S.E.P.R & V.B.T |
76%
Level 2: 60%+
NEET - 2022
Hints
Which one of the following is the correct order of decreasing bond enthalpies for the given species?
1. \(\mathrm {O^{2-}_2>O^-_2>O_2>N_2 }\)
2. \(\mathrm {N_2>O_2>O^{2-}_2>O^-_2 }\)
3. \(\mathrm {N_2>O_2>O^-_2>O^{2-}_2 }\)
4. \(\mathrm {O_2>N_2>O^-_2>O^{2-}_2 }\)
Subtopic: M.O.T |
75%
Level 2: 60%+
NEET - 2022
Hints
Match the molecules in Column-I with their corresponding molecular shapes in Column-II.
Choose the correct matching sequence:
| Column-I (Molecule) |
Column-II (Shape) |
||
| (i) | BF3 | (a) | T-shape |
| (ii) | SF4 | (b) | Square planar |
| (iii) | XeF4 | (c) | See-saw |
| (iv) | ClF3 | (d) | Trigonal planar |
| (i) | (ii) | (iii) | (iv) | |
| 1. | d | c | b | a |
| 2. | a | b | c | d |
| 3. | d | a | c | d |
| 4. | b | c | d | a |
Subtopic: V.S.E.P.R & V.B.T |
86%
Level 1: 80%+
JEE
Please attempt this question first.
Hints
Please attempt this question first.
| Assertion (A): | Sigma (\(\sigma\)) bond is strong, while pi (\(\pi\)) bond is weak. |
| Reason (R): | Atoms rotate freely about pi (\(\pi\)) bond. |
| 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. | Both (A) and (R) are false. |
Subtopic: Types of Chemical Bond |
71%
Level 2: 60%+
Hints
Subtopic: Acidic, Basic Character & Fajan's Rule |
62%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
If an extra electron is added to the hypothetical molecule C2, this extra electron will occupy the molecular orbital:
1. \(\pi_{2p}\)*
2. \(\pi_{2p}\)
3. \(\sigma_{2p}\)*
4. \(\sigma_{2p}\)
1. \(\pi_{2p}\)*
2. \(\pi_{2p}\)
3. \(\sigma_{2p}\)*
4. \(\sigma_{2p}\)
Subtopic: M.O.T |
55%
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
Match List-I with List-II and mark the appropriate option.
| List-I (Types of bond) |
List-II (Molecules) |
||
| A. | Ionic | I. | NH3.BF3 |
| B. | Covalent | II. | HCl |
| C. | Hydrogen bond | III. | LiF |
| D. | Coordinate bond | IV. | HF |
| A | B | C | D | |
| 1 | II | III | IV | I |
| 2 | III | II | I | IV |
| 3 | III | II | IV | I |
| 4 | II | III | I | IV |
Subtopic: van der Waal Force & Hydrogen Bonding | Resonance & Nature of Compounds |
62%
Level 2: 60%+
Hints
The molecules that have an overall permanent dipole moment among the following is/are:
(A) CO2
(B) H2O
(C) NH3
(A) CO2
(B) H2O
(C) NH3
| 1. | A and C only | 2. | C and B only |
| 3. | A, B, and C | 4. | None of these |
Subtopic: Polarity |
82%
Level 1: 80%+
Hints
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