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Q. No.How many molecules among the following exhibit a non-zero dipole moment?
\(BeF_2 , BF_3 , H_2O , NH_3 , HCl , CCl_4 \)
1. Four (4)
2. Six (6)
3. Zero (0)
4. Three (3)
\(BeF_2 , BF_3 , H_2O , NH_3 , HCl , CCl_4 \)
1. Four (4)
2. Six (6)
3. Zero (0)
4. Three (3)
Subtopic: Polarity |
79%
Level 2: 60%+
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The correct statement among the following is:
| 1. | When a covalent bond is formed, transfer of electrons takes place |
| 2. | Pure H2O does not contain any ion |
| 3. | A bond is formed when attractive forces overcome repulsive forces |
| 4. | HF is less polar than HBr |
Subtopic: Types of Chemical Bond | Covalent Bond | Polarity |
77%
Level 2: 60%+
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How many of the following have zero dipole moment?
\(\mathrm{H}_2 \mathrm{S}, \mathrm{CH}_4, \mathrm{NH}_3, \mathrm{BF}_3, \mathrm{SO}_2, \mathrm{NF}_3\)
\(\mathrm{H}_2 \mathrm{S}, \mathrm{CH}_4, \mathrm{NH}_3, \mathrm{BF}_3, \mathrm{SO}_2, \mathrm{NF}_3\)
| 1. | Two(2) | 2. | Five(5) |
| 3. | Four(4) | 4. | Three(3) |
Subtopic: Polarity |
60%
Level 2: 60%+
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Given below are two statements:
| Statement I: | Since electronegativity of F > H, so dipole moment of \(\text{NF}_3\) > \(\text{NH}_3.\) |
| Statement II: | The lone pair dipole in \(\text{NH}_3\) is not in the direction of the resultant bond dipole, while in the case of \(\text{NF}_3\), the lone pair dipole is in the direction of the resultant bond dipole. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are false. |
| 3. | Both Statement I and Statement II are true. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: Polarity |
71%
Level 2: 60%+
JEE
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Which of the following have maximum dipole moment?
1. \(NH_3\)
2. \(PF_5\)
3. \(NF_3\)
4. \(PCl_5\)
1. \(NH_3\)
2. \(PF_5\)
3. \(NF_3\)
4. \(PCl_5\)
Subtopic: Polarity |
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Subtopic: Polarity |
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Number of non polar molecules given following.
\(\mathrm{H}_2 \mathrm{O}, \mathrm{SO}_2, \mathrm{BF}_3, \mathrm{H}_2, \mathrm{CHCl}_3\)
1. 2
2. 1
3. 0
4. 6
\(\mathrm{H}_2 \mathrm{O}, \mathrm{SO}_2, \mathrm{BF}_3, \mathrm{H}_2, \mathrm{CHCl}_3\)
1. 2
2. 1
3. 0
4. 6
Subtopic: Polarity |
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Which of the following is correct order of bond length?
1. \(\mathrm{C}-\mathrm{H}<\mathrm{C} \equiv \mathrm{N}<\mathrm{C}=\mathrm{O}<\mathrm{C}-\mathrm{O} \)
2. \(\mathrm{C} \equiv \mathrm{N}<\mathrm{C}-\mathrm{H}<\mathrm{C}-\mathrm{O}<\mathrm{C}=\mathrm{O} \)
3. \(\mathrm{C}-\mathrm{H}<\mathrm{C}\equiv\mathrm{N}<\mathrm{C}-\mathrm{O}<\mathrm{C}=\mathrm{O} \)
4. \(\mathrm{C}-\mathrm{O}<\mathrm{C}\equiv\mathrm{N}<\mathrm{C}=\mathrm{O}<\mathrm{C}-\mathrm{H}\)
1. \(\mathrm{C}-\mathrm{H}<\mathrm{C} \equiv \mathrm{N}<\mathrm{C}=\mathrm{O}<\mathrm{C}-\mathrm{O} \)
2. \(\mathrm{C} \equiv \mathrm{N}<\mathrm{C}-\mathrm{H}<\mathrm{C}-\mathrm{O}<\mathrm{C}=\mathrm{O} \)
3. \(\mathrm{C}-\mathrm{H}<\mathrm{C}\equiv\mathrm{N}<\mathrm{C}-\mathrm{O}<\mathrm{C}=\mathrm{O} \)
4. \(\mathrm{C}-\mathrm{O}<\mathrm{C}\equiv\mathrm{N}<\mathrm{C}=\mathrm{O}<\mathrm{C}-\mathrm{H}\)
Subtopic: Types of Chemical Bond | Covalent Bond | Polarity | Hybridisation |
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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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