Q. No.Molecules with least dipole moment among the following species \(\mathrm{CHCl}_3, \mathrm{NF}_3, \mathrm{H}_2 \mathrm{S}, \mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3\) has 'X' number of lone pair on central atom: Find X:
1. 0
2. 1
3. 2
4. 3
1. 0
2. 1
3. 2
4. 3
Subtopic: Polarity | V.S.E.P.R & V.B.T |
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For \(XeO_2F_2,\) select the correct statements:
(A) It has see-saw shape
(B) \( \angle \mathrm{FXeF} \approx 180^{\circ} \)
(C) \( \angle \mathrm{OXeO} \approx 180^{\circ} \)
(D) Number of valence electron on Xe = 5
1. A, B, C and D
2. A and B only
3. B and D only
4. A and C only
(A) It has see-saw shape
(B) \( \angle \mathrm{FXeF} \approx 180^{\circ} \)
(C) \( \angle \mathrm{OXeO} \approx 180^{\circ} \)
(D) Number of valence electron on Xe = 5
1. A, B, C and D
2. A and B only
3. B and D only
4. A and C only
Subtopic: V.S.E.P.R & V.B.T |
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Which of the following linear combination of atomic orbitals will lead to the formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction]?
A. \(2 p_z \text { and } 2 p_x\)
B. \(2 \mathrm{s} \text { and } 2 \mathrm{p}_{\mathrm{x}}\)
C. \(3 d_{x y} \text { and } 3 d_{x^2-y^2}\)
D. \(2 \mathrm{s} \text { and } 2 \mathrm{p}_{\mathrm{z}}\)
E. \(2 p_z \text { and } 3 d_{x^2-y^2}\)
1. E Only
2. A and B Only
3. D Only
4. C and D Only
A. \(2 p_z \text { and } 2 p_x\)
B. \(2 \mathrm{s} \text { and } 2 \mathrm{p}_{\mathrm{x}}\)
C. \(3 d_{x y} \text { and } 3 d_{x^2-y^2}\)
D. \(2 \mathrm{s} \text { and } 2 \mathrm{p}_{\mathrm{z}}\)
E. \(2 p_z \text { and } 3 d_{x^2-y^2}\)
1. E Only
2. A and B Only
3. D Only
4. C and D Only
Subtopic: Types of Chemical Bond | V.S.E.P.R & V.B.T |
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Which of the following statements is true with respect to \(\mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3 \text { and } \mathrm{CH}_4\)?
Choose the correct answer from the options given below:
1. A, B and C only
2. C, D and E only
3. A, D and E only
4. A, B, C and E only
| A. | The central atoms of all the molecules are sp3 hybridized |
| B. | The H–O–H, H–N–H and H–C–H angles in the above molecules are 104.5º, 107.5º and 109.5º respectively. |
| C. | The increasing order of dipole moment is \(\mathrm{CH}_4<\mathrm{NH}_3<\mathrm{H}_2 \mathrm{O} .\) |
| D. | Both H2O and NH3 are Lewis acids and CH4 is a Lewis base |
| E. | A solution of NH3 in H2O is basic. In this solution NH3 and H2O act as Lowry-Bronsted acid and base respectively. |
1. A, B and C only
2. C, D and E only
3. A, D and E only
4. A, B, C and E only
Subtopic: V.S.E.P.R & V.B.T |
60%
Level 2: 60%+
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Which of the following molecules exhibit a square pyramidal geometry?
| 1. | \(\mathrm{BrF}_5 ~\&~ \mathrm{XeOF}_4\) | 2. | \(\mathrm{SbF}_5 ~\&~ \mathrm{XeOF}_4\) |
| 3. | \(\mathrm{SbF}_5 ~\&~ \mathrm{PCl}_5\) | 4. | \(\mathrm{BrF}_5 ~\&~ \mathrm{PCl}_5\) |
Subtopic: Hybridisation | V.S.E.P.R & V.B.T |
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Match the following List-I with List-II and choose the correct option.
1. A-IV, B-II, C-I, D-III
2. A-II, B-IV, C-III, D-I
3. A-IV, B-III, C-I, D-II
4. A-I, B-II, C-III, D-IV
| List-I (Compounds) | List-II (Shape and Hybridization) | ||
| (A) | \(PF_5\) | (I) | Tetrahedral and \(sp^3\) |
| (B) | \(SF_6\) | (II) | Square planar and \(dsp^2\) |
| (C) | \(Ni(CO)_4\) | (III) | Octahedral and \(sp^3d^2\) |
| (D) | \([PtCl_4]^{2-}\) | (IV) | Trigonal bipyramidal and \(sp^3d\) |
2. A-II, B-IV, C-III, D-I
3. A-IV, B-III, C-I, D-II
4. A-I, B-II, C-III, D-IV
Subtopic: V.S.E.P.R & V.B.T |
75%
Level 2: 60%+
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Given below are two statements:
In light of the above statements, choose the correct option:
| Statement I: | \(CIF_3\) has \(3\) possible structures  |
| Statement II: | III is the most stable structure due to the least lp-bp repulsion. |
In light of the above statements, choose the correct option:
| 1. | Both Statement I and Statement II are correct. |
| 2. | Statement I is correct but Statement II is incorrect. |
| 3. | Statement I is incorrect but Statement II is correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: V.S.E.P.R & V.B.T |
Level 3: 35%-60%
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Among the following molecules which has \(\mathrm{sp^3d}\) hybridized having only one lone pair of electrons?
\(\mathrm{XeF}_2, \mathrm{XeF}_4, \mathrm{PF}_5 ~ \text {and}~\mathrm{SF}_4\)
1. \(\mathrm{XeF}_2\)
2. \(\mathrm{XeF}_4\)
3. \(\mathrm{PF}_5\)
4. \(\mathrm{SF}_4\)
\(\mathrm{XeF}_2, \mathrm{XeF}_4, \mathrm{PF}_5 ~ \text {and}~\mathrm{SF}_4\)
1. \(\mathrm{XeF}_2\)
2. \(\mathrm{XeF}_4\)
3. \(\mathrm{PF}_5\)
4. \(\mathrm{SF}_4\)
Subtopic: V.S.E.P.R & V.B.T |
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Level 1: 80%+
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How many of the following compounds are sp3 hybridised?
\(\mathrm{ClO}_3^{-}, \mathrm{ClO}_2^{-}, \mathrm{NH}_3, \mathrm{NO}_2\)
1. 4
2. 3
3. 1
4. 0
\(\mathrm{ClO}_3^{-}, \mathrm{ClO}_2^{-}, \mathrm{NH}_3, \mathrm{NO}_2\)
1. 4
2. 3
3. 1
4. 0
Subtopic: Hybridisation | V.S.E.P.R & V.B.T |
88%
Level 1: 80%+
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Identify the correct match among the given species and respective shape of molecule
1. A
2. B
3. C
4. D
| Species | Shape | |
| (A) | \(\mathrm{NH}_4^{+}\) | See-Saw |
| (B) | \(\mathrm{SF}_4\) | Tetrahedral |
| (C) | \(\mathrm{ClF}_3\) | T-shaped |
| (D) | \(\mathrm{XeF}_6\) | Square planar |
1. A
2. B
3. C
4. D
Subtopic: V.S.E.P.R & V.B.T |
90%
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