NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXI13:HYDROCARBONS
318218
Anthracene is a resonance hybrid of four resonating structures. The double bond character of \({\mathrm{\left(\mathrm{C}^{1}-\mathrm{C}^{2}\right)}}\) is ____ .
1 0.25
2 0.5
3 0.75
4 1
Explanation:
Anthracene show 4 resonating structures as: Double bond character No. of times double bond appears\({\mathrm{=\dfrac{\text { in all resonating structures }}{\text { Total number of resonating structures }}}}\) \({\mathrm{=\dfrac{3}{4}=0.75}}\)
CHXI13:HYDROCARBONS
318219
Which of the following will satisfy aromaticity? a) b) c) d)
1 a, b and c
2 a and b
3 a, b and d
4 c and d
Explanation:
Conditions for aromaticity: (a) Molecule must be cyclic, planar ( \(\mathrm{sp}^{2}\) hybridised) (b) Molecule must be conjugate (c) Molecule must satisfy Huckel's rule i.e., \({\text{(4 n + 2)}}\) rule
JEE - 2021
CHXI13:HYDROCARBONS
318206
Assertion : Benzene reacts with \(\mathrm{Cl}_{2}\) in presence of light to give \(\mathrm{BHC}\). Reason : \(\mathrm{BHC}\) is also known as gammexane.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In presence of light, free radical addition of \(\mathrm{Cl}_{2}\) to benzene gives benzenehexachloride (BHC) (Gammaxene). so, option (2) is correct.
CHXI13:HYDROCARBONS
318207
In the sequence of the given reactions, identify \(\mathrm{X}\) and \(\mathrm{Y}\) :
318218
Anthracene is a resonance hybrid of four resonating structures. The double bond character of \({\mathrm{\left(\mathrm{C}^{1}-\mathrm{C}^{2}\right)}}\) is ____ .
1 0.25
2 0.5
3 0.75
4 1
Explanation:
Anthracene show 4 resonating structures as: Double bond character No. of times double bond appears\({\mathrm{=\dfrac{\text { in all resonating structures }}{\text { Total number of resonating structures }}}}\) \({\mathrm{=\dfrac{3}{4}=0.75}}\)
CHXI13:HYDROCARBONS
318219
Which of the following will satisfy aromaticity? a) b) c) d)
1 a, b and c
2 a and b
3 a, b and d
4 c and d
Explanation:
Conditions for aromaticity: (a) Molecule must be cyclic, planar ( \(\mathrm{sp}^{2}\) hybridised) (b) Molecule must be conjugate (c) Molecule must satisfy Huckel's rule i.e., \({\text{(4 n + 2)}}\) rule
JEE - 2021
CHXI13:HYDROCARBONS
318206
Assertion : Benzene reacts with \(\mathrm{Cl}_{2}\) in presence of light to give \(\mathrm{BHC}\). Reason : \(\mathrm{BHC}\) is also known as gammexane.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In presence of light, free radical addition of \(\mathrm{Cl}_{2}\) to benzene gives benzenehexachloride (BHC) (Gammaxene). so, option (2) is correct.
CHXI13:HYDROCARBONS
318207
In the sequence of the given reactions, identify \(\mathrm{X}\) and \(\mathrm{Y}\) :
318218
Anthracene is a resonance hybrid of four resonating structures. The double bond character of \({\mathrm{\left(\mathrm{C}^{1}-\mathrm{C}^{2}\right)}}\) is ____ .
1 0.25
2 0.5
3 0.75
4 1
Explanation:
Anthracene show 4 resonating structures as: Double bond character No. of times double bond appears\({\mathrm{=\dfrac{\text { in all resonating structures }}{\text { Total number of resonating structures }}}}\) \({\mathrm{=\dfrac{3}{4}=0.75}}\)
CHXI13:HYDROCARBONS
318219
Which of the following will satisfy aromaticity? a) b) c) d)
1 a, b and c
2 a and b
3 a, b and d
4 c and d
Explanation:
Conditions for aromaticity: (a) Molecule must be cyclic, planar ( \(\mathrm{sp}^{2}\) hybridised) (b) Molecule must be conjugate (c) Molecule must satisfy Huckel's rule i.e., \({\text{(4 n + 2)}}\) rule
JEE - 2021
CHXI13:HYDROCARBONS
318206
Assertion : Benzene reacts with \(\mathrm{Cl}_{2}\) in presence of light to give \(\mathrm{BHC}\). Reason : \(\mathrm{BHC}\) is also known as gammexane.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In presence of light, free radical addition of \(\mathrm{Cl}_{2}\) to benzene gives benzenehexachloride (BHC) (Gammaxene). so, option (2) is correct.
CHXI13:HYDROCARBONS
318207
In the sequence of the given reactions, identify \(\mathrm{X}\) and \(\mathrm{Y}\) :
318218
Anthracene is a resonance hybrid of four resonating structures. The double bond character of \({\mathrm{\left(\mathrm{C}^{1}-\mathrm{C}^{2}\right)}}\) is ____ .
1 0.25
2 0.5
3 0.75
4 1
Explanation:
Anthracene show 4 resonating structures as: Double bond character No. of times double bond appears\({\mathrm{=\dfrac{\text { in all resonating structures }}{\text { Total number of resonating structures }}}}\) \({\mathrm{=\dfrac{3}{4}=0.75}}\)
CHXI13:HYDROCARBONS
318219
Which of the following will satisfy aromaticity? a) b) c) d)
1 a, b and c
2 a and b
3 a, b and d
4 c and d
Explanation:
Conditions for aromaticity: (a) Molecule must be cyclic, planar ( \(\mathrm{sp}^{2}\) hybridised) (b) Molecule must be conjugate (c) Molecule must satisfy Huckel's rule i.e., \({\text{(4 n + 2)}}\) rule
JEE - 2021
CHXI13:HYDROCARBONS
318206
Assertion : Benzene reacts with \(\mathrm{Cl}_{2}\) in presence of light to give \(\mathrm{BHC}\). Reason : \(\mathrm{BHC}\) is also known as gammexane.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
In presence of light, free radical addition of \(\mathrm{Cl}_{2}\) to benzene gives benzenehexachloride (BHC) (Gammaxene). so, option (2) is correct.
CHXI13:HYDROCARBONS
318207
In the sequence of the given reactions, identify \(\mathrm{X}\) and \(\mathrm{Y}\) :
