Nitrobenzene on treatment with zinc dust and aqueous ammonium chloride gives

• C₆H₅N =N-C₆H₅

• C₆H₅NH₂

• C₆H₅NO

• C6H₅NHOH.

Thymine is

• 5-methyluracil

• 4-methyluracil

• 3-methyluracil

• 1-methyluracil

53.

Lysine is least soluble in water in the pH range

• 3 to 4

• 5 to 6

• 6 to 7

• 8 to 9.

Methyl-$\mathrm{\alpha }-\mathrm{D}$-glucoside and methyl-$\mathrm{\beta }$-D-glucoside are

• epimers

• anomers

• enantiomers

• conformational diastereomers.

Which ofthe following compounds has the highest boiling point?

• CH₃CH₂CH₂Cl

• CH₃CH₂CH₂CH₂Cl

• CH₃CH(CH₃)CH₂Cl

• (CH₃)₃CCl

The correct increasing order of the reactivity of halides for S_N 1 reaction is

• CH₃- CH₂- X<(CH₃)₂CH= X <CH₂= CH-CH₂- X< PhCH₂- X

• (CH₃)₂CH-X <CH₃-CH₂- X < CH₂= CH - CH₂-X < PhCH₂-X

• PhCH₂- X<(CH₃)₂CH=X<CH₃-CH₂-X<CH₂= CH- CH₂- X

• CH₂= CH - CH₂- X < Ph- CH₂- X <(CH₃)₂CH-X <CH₃-CH₂- X

The major product formed in the following reaction is

${\mathrm{CH}}_2\mathrm{CH}\left(\mathrm{Cl}\right){\mathrm{CH}}_2-{\mathrm{CH}}_2\mathrm{OH} \stackrel{\mathrm{aq}. \mathrm{KOH}}{\to }$

• CH₃CH = CH- CH₂OH

• CH₂=CH- CH₂- CH₂OH

• ${\mathrm{CH}}_3-\underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}-{\mathrm{CH}}_2-{\mathrm{CH}}_2\mathrm{OH}$

• 

Assertion : In the iodometric titration starch is used as an indicator.

Reason : Starch is a polysaccharide.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Assertion: Anilinium chloride is more acidic than ammonium chloride.

Reason : Anilinium ion is resonance-stabilised.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Assertion : 1,3-butadiene is the monomer for natural rubber.

Reason : Natural rubber is formed through anionic addition polymerization.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements