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Q. No.Given below are two statements:
Assertion (A):
o-Nitrophenol is more volatile than p-Nitrophenol.
Reason (R):
Intramolecular hydrogen bonding is present in o-nitrophenol while intermolecular H-bonding is present in p-nitrophenol.
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: van der Waal Force & Hydrogen Bonding |
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The pair of ions that is isoelectronic with \(\text{Al}^{3+}\) ion is:
1. \(\mathrm{Mg}^{2+}, \mathrm{O}^{2-} \)
2. \(\mathrm{Na}^{+}, \mathrm{N}^{2-} \)
3. \(\mathrm{C}^{4-}, \mathrm{Cl}^{-} \)
4. \(\mathrm{F}^{-}, \mathrm{Mg}^{+} \)
1. \(\mathrm{Mg}^{2+}, \mathrm{O}^{2-} \)
2. \(\mathrm{Na}^{+}, \mathrm{N}^{2-} \)
3. \(\mathrm{C}^{4-}, \mathrm{Cl}^{-} \)
4. \(\mathrm{F}^{-}, \mathrm{Mg}^{+} \)
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
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| Assertion (A): | C-Cl bond in CCl4 is polar whereas the molecule is non-polar. |
| Reason (R): | The resultant dipole moment of four C-Cl bonds in CCl4 is zero. |
| 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: Polarity |
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Which of the following nitrogen oxides contains an odd number of electrons
(unpaired electron) on the nitrogen atom, making it a paramagnetic radical?
2. NO2
3. N2O3
4. N2O5
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
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Level 2: 60%+
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Amongst SF4, XeF4, CF4, and H2O, the number of species with two lone pairs of electrons on the central atom is:
1. 3
2. 1
3. 2
4. 0
1. 3
2. 1
3. 2
4. 0
Subtopic: V.S.E.P.R & V.B.T |
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Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
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Which molecule among the following exhibits the least strength in its overall intermolecular forces?
[atomic numbers: H = 1; C = 6; N = 7; O = 8; F = 9]
1. H2O
2. CH4
3. HF
4. NH3
[atomic numbers: H = 1; C = 6; N = 7; O = 8; F = 9]
1. H2O
2. CH4
3. HF
4. NH3
Subtopic: van der Waal Force & Hydrogen Bonding |
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Number of lone pairs of electrons in the central atom of \(SCl_2 , O_3 , ClF_3 \) and \(SF_6\) respectively, are :
1. 0, 1, 2 and 2
2. 2, 1, 2 and 0
3. 1, 2, 2 and 0
4. 2, 1, 0 and 2
1. 0, 1, 2 and 2
2. 2, 1, 2 and 0
3. 1, 2, 2 and 0
4. 2, 1, 0 and 2
Subtopic: V.S.E.P.R & V.B.T |
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Subtopic: V.S.E.P.R & V.B.T |
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Assertion(A): Dinitrogen is chemically unreactive at ordinary temperature and is very stable.
Reason(R): The bond dissociation energy is 946 kJ mol-1.
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 and R is false.
4. A and R both are false.
Reason(R): The bond dissociation energy is 946 kJ mol-1.
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 and R is false.
4. A and R both are false.
Subtopic: Resonance & Nature of Compounds |
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