Chemistry set 27


Q.1 When purely alcoholic solution of sodium/potassium hydroxide and halogenoalkanes are
reacted an alkene is formed, what is the mechanism of reaction?
A) Elimination C) Debromination
B) Dehydration D) Reduction of benzene
Q.2 The organic compound carbon tetrachloride is used as:
A) Lubricant C) Oxidant
B)
Solvent D) Plastic

Q.3 The alkaline hydrolysis of bromoethane shown below gives alcohol as the product:
H
3C―CH2―Br H3C―CH2―OH
The reagent and the condition used in this reaction may be:
A) H2O at room temperature C) KOH in alcohol
B) Ethanol, heat D)
Dilute NaOH(aq) warm
Q.4 In substitution reactions, dihaloalkane or secondary halogenoalkane give / show:
A) SN1 Mechanism C) Both E1 and E2
B) SN2 Mechanism D) Both SN1 and SN2

Q.5 The order of reactivity of alkyl halides towards nucleophile is:
A) RI > RBr > RF > RCl C) RF > RCl > RBr > RI
B)
RI > RBr > RCl > RF D) RF > RBr > RCl > RI


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