Class 11
Here we provide chapter wise detailed text solution for NCERT Exemplar questions. And we provide video explanation for each and every question separately.
Question & Answers
Here we provide detailed text solution for NCERT Exemplar Solutions. And we provide video explanation for each and every question separately.
Chemistry
Q-19. The molecules having dipole moment are .
(i) 2, 2-Dimethylpropane
(ii) trans-Pent-2-ene
(iii) cis-Hex-3-ene
(iv) 2, 2, 3, 3 - Tetramethylbutane.
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Chemistry
Q-18. Four structures are given in options (i) to (iv), Examine them and select the aromatic structure.
Chemistry
Q-17. Which of the following are correct?
(i) CH3 – O – CH+2 is more stable than CH3 – CH+2
(ii) (CH3)2CH+ is less stable than CH3 – CH2 – CH+2
(iii) CH2 = CH – CH+2 is more stable than CH3 – CH2 – CH+2
(iv) CH2 = CH+ is more stable than CH3 – CH+2
Chemistry
Q-16. In an electrophilic substitution reaction of nitrobenzene, the presence of nitro group .
(i) deactivates the ring by inductive effect.
(ii) activities the ring by inductive effect.
(iii) decreases the charge density at ortho and para position of the ring relative to meta position by resonance,
(iv) increases the charge density at meta position relative to the ortho and para positions of the ring by resonance,
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Chemistry
Q-15. For an electrophilic substitution reaction, the presence of a halogen atom in the benzene ring .
(i) deactivates the ring by inductive effect
(ii) deactivates the ring by resonance
(iii) increases the charge density at ortho and para position relative to meta position by resonance
(iv) directs the incoming electrophile to meta position by increasing the charge density relative to ortho and para position.
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Chemistry
Q-14. Which are the correct IUPAC name of the following compound?
(i) 5-(2',2'-DimethyIpropyl)-decane
(ii) 4-Butyl-2,2-dimethylnonane
(iii) 2,2-Dimethyl-4-pentyloctane
(iv) 5-neo-Pentyldecane
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