6.Which compound can exist in a dipolar(zwitterion) state? A) $C_{6}H_{5}CH_{2}CH(N=CH_{2})COOH$ B) $\left(CH_{3}\right)_{2}CH.CH\left(NH_{2}\right)COOH$ C) $C_{6}H_{5}CONHCH_{2}COOH$ D) $HOOC.CH_{2}CH_{2}COCOOH$ View Answer Report DiscussAnswer: Option BExplanation:
7.When acetylene is passed into methanol at 160- 200°C in the presence of a small amount of potassium methoxide under pressure, the following is formed - A) Polyvinyl alcohol B) Divinyl ether C) Dimethyl ether D) Methyl vinyl ether View Answer Report DiscussAnswer: Option DExplanation:When acetylene is passed into methanol at 160-200°C in the presence of a small amount (1-2%) of potassium methoxide and under pressure just high enough to prevent boiling, methyl vinyl ether is formed. The mechanism is believed to involve nucleophildic attack in the first step.
8.Glucose when heated with CH3OH in presence of dry HCl gas gives α- and β-methyl glucosides because it contains: A) An aldehyde group B) A-$CH_{2}OH$group C) A ring structure D) Five hydroxyl groups View Answer Report DiscussAnswer: Option CExplanation:
9.An alkene of molecule formula C9H18 on ozonolysis gives 2, 2-dimethylpropanal & 2- butanone, then the alkene is A) 2,2,4-trimethyl-3-hexene B) 2, 2, 6-trimethyl-3-hexene C) 2,3,trimethyl-2-hexene D) 2, 2-dimethyl -2-heptene View Answer Report DiscussAnswer: Option AExplanation:
10.Among the following molecule (i) XeO3 (ii) XeOF4 (iii) XeF6 Those having the same number of lone pairs on Xe are A) (i)and (ii)only B) (i)and(iii)only C) (ii)and(iii)only D) (i),(ii)and(iii) View Answer Report DiscussAnswer: Option DExplanation:
