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Q. No.From the following, the incorrect assertion with respect to dipole moments of the species given is:
1. \(CH_3Cl > CHCl_3 \)
2. \(CH_2Cl_2 = CCl_4 \)
3. \(NH_3 > NF_3 \)
4. \(BF_3 = CO_2 \)
Subtopic: Polarity |
64%
From NCERT
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Which one of the following statements is true about the structure of \(\mathrm{CO^{2-}_3}\) ion?
| 1. | It can be explained by considering sp3 hybridization. |
| 2. | Out of the three C–O bonds, two are longer and one is shorter. |
| 3. | It has three sigma and three \(\pi\)-bonds. |
| 4. | All three C–O bonds are equal in length with a bond order in between 1 and 2. |
Subtopic: Resonance & Nature of Compounds |
54%
From NCERT
NEET - 2022
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| 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%
From NCERT
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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%
From NCERT
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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 |
83%
From NCERT
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The molecular geometry of XeF5⁺ will be:
1. Square pyramidal
2. Square planar
3. Trigonal bipyramidal
4. Octahedral
1. Square pyramidal
2. Square planar
3. Trigonal bipyramidal
4. Octahedral
Subtopic: Hybridisation |
70%
From NCERT
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Identify the incorrect statements, regarding the molecule XeO4:
1. XeO4 molecule is square planar
2. There are four p\(\pi\) – d\(\pi\) bonds
3. There are four sp3 – p, \(\sigma\) bonds
4. XeO4 molecule is tetrahedral
1. XeO4 molecule is square planar
2. There are four p\(\pi\) – d\(\pi\) bonds
3. There are four sp3 – p, \(\sigma\) bonds
4. XeO4 molecule is tetrahedral
Subtopic: V.S.E.P.R & V.B.T |
66%
From NCERT
NEET - 2013
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In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramagnetic to diamagnetic?
1. \(\mathrm{O_{2}\rightarrow O_{2}^{+} }\)
2. \(\mathrm{C_{2}\rightarrow C_{2}^{+} }\)
3. \(\mathrm{NO\rightarrow NO^{+} }\)
4. \(\mathrm{N_{2}\rightarrow N_{2}^{+} }\)
1. \(\mathrm{O_{2}\rightarrow O_{2}^{+} }\)
2. \(\mathrm{C_{2}\rightarrow C_{2}^{+} }\)
3. \(\mathrm{NO\rightarrow NO^{+} }\)
4. \(\mathrm{N_{2}\rightarrow N_{2}^{+} }\)
Subtopic: M.O.T |
74%
From NCERT
NEET - 2013
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Which molecule among the following does not exhibit resonance?
1. \(\mathrm{C_6 H_6}\)
2. \(\mathrm{CO_2}\)
3. \(\mathrm{CO_3^{2-}}\)
4. \(\mathrm{SiO_2}\)
1. \(\mathrm{C_6 H_6}\)
2. \(\mathrm{CO_2}\)
3. \(\mathrm{CO_3^{2-}}\)
4. \(\mathrm{SiO_2}\)
Subtopic: Resonance & Nature of Compounds |
59%
From NCERT
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Correct Lewis structure of the nitrite ion, \(NO_{2}^{-}\) among the following is:
| 1. |  |
2. |  |
| 3. |  |
4. | None of the above |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
81%
From NCERT
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