The chlorination of ethane is an example for which type of the following reactions ?
Nucleophilic substitution
Electrophilic substitution
Free radical substitution
Rearrangement
Which of the following reagent is used to find out carbon-carbon multiple bonds?
Grignard reagent
Baeyer's reagent
Sandmeyer's reagent
Gatermann reagent
Which one of the following is more readily hydrolysed by SN1 mechanism?
(C6H5)2C(CH3)Br
C6H5CH2Br
C6H5CH(CH3)Br
(C6H5)2CHBr
Identify the statement which is not correct?
Dehydrobrominaton of 2-bromopentane gives pent-1-ene as the major product
Freon 12 is manufactured by Swarts reaction
CHCl3 is stored in closed, dark coloured bottles
Chronic exposure to CHCl3 causes liver damage
In the combustion of 2.0 g of methane, 25 kcal heat is liberated, heat of combustion of methane would be
100 kcal
200 kcal
300 kcal
400 kcal
Identify the correct statements for a ring system to exhibit aromaticity
(i) It must not be planar
(ii) The ring must contain (4n+ 2)Π electrons.
(iii) The ring must be planar.
(iv) It must possess 4n Π electrons.
The correct answer is:
ii, iv
i, ii
i, iv
ii, iii
D.
ii, iii
For a compound to be aromatic statement (iii) and (ii) are must correct statement but statement (i) and (iv) are incorrect i.e
(ii) The ring must contain (4n+ 2)Π electrons.
(iii) The ring must be planar.