1.Which set has different class of compounds? A) Traquililizers-Equanil , heroin, valium B) antiseptics-Bithional , dettol, boric acid C) Analgesics-Naproxen, morphine , asprin D) Bactericidal-penicillin, aminoglycosides , ofloxacin View Answer Report DiscussAnswer: Option AExplanation:Heroin is a narcotic analgesic and not used as transquilizer
2.Among the following the strongesr nucleophile is A) $C_{2}H_{5}SH$ B) $CH_{3}COO^{-}$ C) $CH_{3}NH_{2}$ D) $NCCH_{2}$ View Answer Report DiscussAnswer: Option AExplanation: Nucleophiles are species that have a tendency to donate a pair of electrons. They can be neutral or negatively charged. The nucleophilic power depends on the tendency of species to donate electrons. Due to the presence of the +1 effect, it increases. Hence, the higher the +1 effect, higher the nucleophilic power
3.Which of the following isomerisms is shown by ethyl acetoacetate? A) Geometrical isomerism B) keto-enol tautomerism C) Enantimerism D) Diastereoisomerism View Answer Report DiscussAnswer: Option BExplanation:
4.What will be the order of reactivity of the following carbonyl; compounds with Grignard's reagent? A) I > II > III> IV B) IV> III >II > I C) II> I > IV> III D) III >II> I >IV View Answer Report DiscussAnswer: Option AExplanation:As the number and size of the alkyl groups increases, reactivity decreases. Hence, the correct order of reactivity is
5.How many sigma and pi- bonds are there in the molecule of dicyanoethane (CN-CH=CH-CN) ? A) 3 sigma and 3 pi B) 5 sigma and 2 pi C) 7 sigma and 5 pi D) 2 sigma and 3 pi View Answer Report DiscussAnswer: Option CExplanation:
