Acid catalyzed hydration of alkenes except ethene leads to the formation of

• mixture of secondary and tertiary alcohols

• mixture of primary and secondary alcohols

• secondary or tertiary alcohol

• primary alcohol

Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound of water during the reaction is continuously removed. The compound formed is generally known as

• an amine

• an imine

• an enamine

• a Schiff's base

Consider the acidity of the carboxylic acids

(i) PhCOOH

(ii) o-NO₂C₆H₄COOH

(iii) p-NO₂C₆H₄COOH

(iv) m-NO₂C₆H₄COOH

Which of the following order is correct?

• (i) > (ii) > (iii) > (iv)

• (ii) > (iv) > (iii) > (i)

• (ii) > (iv) > (i) > (iii)

• (ii) > (iii) > (iv) > (i)

The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is

• gammexane

• DDT

• freon

• hexachloroethane

Among the following compounds which can be dehydrated very easily ?

• CH₃CH₂CH₂CH₂CH₂OH

• CH₃CH₂CH₂CH(OH)CH₃

• CH₃CH_{2$\underset{\mathrm{OH}}{\overset{{\mathrm{CH}}_3}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$CHCH3}

• CH₃CH₂CH(CH₃)CH₂CH₂OH

Phospholipids are esters of glycerol with

• one carboxylic acid residue and two phosphate groups

• three phosphate groups

• three carboxylic acid residues

• two carboxylic acid residues and one phosphate groups

67.

In a set of the given reactions, acetic acid yielded a product C.

CH₃COOH + PCl₅ → A

A $\underset{\mathrm{anhy}. {\mathrm{AlCl}}_3}{\overset{{\mathrm{C}}_6{\mathrm{H}}_6}{\to }} \mathrm{B} \underset{\mathrm{ether}}{\overset{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{MgBr}}{\to }}$ C

Product C would be

• CH₃CH(OH)C₆H₅

• CH₃-$\stackrel{{\mathrm{C}}_2{\mathrm{H}}_5}{\stackrel{|}{\mathrm{C}}}$(OH)C₆H₅

• CH₃CH(OH)C₂H₅

• CH₃COC₆H₅

Which one of the following structures represents the peptide chain ?

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

• Three

• Four

• One

• Two

Which one of the following compounds, is most acidic?

• Cl-CH₂-CH₂-OH

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