Important Questions of Haloalkanes and Haloarenes Chemistry | Zigya

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211.

1-butyne on oxidation with hot alkaline KMnO4 would yield. Which of the following as end product?

  • CH3CH2CH2COOH

  • CH3CH2COOH

  • CH3CH2CH2COOH + CO2 + H2O

  • CH3CH2CH2COOH + HCOOH


212.

 A cubic unit cell of a metal with a molar mass of 63.55 g mol-1 has an edge length of 362 pm. Its density is 8.92 g cm-3. The type of unit cell is

  • Primitive

  • Face centred

  • End centred

  • Body Centred


213.

Which of the following is the major product in the reaction of HOBr with propene?

  • 2-bromo, 1-propanol

  • 3-bromo,1-propanol

  • 2-bromo, 2-propanol

  • 1-bromo, 2-propanol


214.

Which of the following is the correct IUPAC name?

  • 3,4 -dimethyl pentanoyl chloride

  • 1-chloro-1-oxo-2, 3-dimethyl pentane

  • 2-ethyl-3-methyl butanoyl chloride

  • 2,3-dimethyl pentanoyl chloride


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215.

The pair of boiling point and compound are given as,

C6H(80°C); CH3OH (65°C); C6H5NO2 (212°C) and C6H5NH2 (184°C)

Which will show lowest vapour pressure at room temperature?

  • C6H6

  • CH3OH

  • C6H5NO2

  • C6H5NH2


216.

In the following conversion,

Identify 'A' from the following option

  • NaBD4

  • LiAID4

  • Mg, ether/D2O

  • BH3, D2O


217.

Ethers like ROR can be cleaved by concentrated HI but not by HCl because

  • I- is a weaker nucleophile than Cl-

  • I- is stronger nucleophile than Cl-

  • SN1 mechanism carried out in this reaction is rapidly in presence of HI.

  • None of the above


218.

Consider the following reaction sequence

CH3OH HBr 'A' KCN 'B' H2/ Ni 'C' HNO2 'D'

Choose the correct option regarding the different products obtained in the above reaction sequence:

  • 'D' is an alcohol consisting one carbon more than the starting alcohol

  • Product 'B' is formed via SN2-pathway

  • 'C' is an amine

  • All of the above


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219.

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

  • acyl chloride > acid anhydride > ester > amide

  • ester > acyl chloride > amide > acid anhydride

  • acid anhydride > amide > ester > acyl chloride

  • acyl chloride> ester> acid anhydride > amide


220.

The suitable reaction steps to carry out the following transformation is

  • (ii) H2O2, NaOH(i) BH3, THF HIO4

  • (CH3)3C.COOH, OH-OsO4 H2OK3Cr2O7.H2SO4

  • (ii) H2O2, NaOH(i) BH3, THF CH2Cl2PCC

  • H2O, H2SO4 (dil) CH2Cl2PCC


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