51.

Identify the end product:

• 

• 

• 

• 

In the given reaction ,

R-OH + HX $\to$RX + H₂O

the order of reactivity of alcohols is:

• tertiary < secondary < primary

• tertiary > secondary > primary

• tertiary < secondary > primary

• secondary > primary > tertiary

o-toluic acid on reaction with Br₂ + Fe gives:

Which ofthe following reactions will not give a primary amine?

• CH₃NC $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

• CH₃CN $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

• CH₃CONH₂ $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

• CH₃CONH₂$\stackrel{{\mathrm{Br}}_2/\mathrm{KOH}}{\to }$

In the given reaction,

$\stackrel{{\mathrm{Br}}_2/\mathrm{Fe}}{\to }$ X $\stackrel{\mathrm{Sn}/\mathrm{HCl}}{\to }$ Y

The products X and Y respectively are:

• o-bromo nitrobenzene and o-bromoaniline

• p-bromo nitrobenzene and p-bromoaniline

• m-bromo nitrobenzene and m-bromoaniline

• m-bromo nitrobenzene and m-bromoaniline

Which one of the following reactions cannot be used for the reduction of:

• HI and red phosphorus at 200C

• Wolff-Kishner reduction

• Clemmensen reduction

• Wurtz reaction

Buna-N synthetic rubber is a copolymer of:

• H₂C=CH-CN and H₂C=CH-CH=CH₂

• H₂C=CH-CN and H₂C=CH-$\underset{\underset{\mathrm{Cl}}{|}}{\mathrm{C}}$=CH₂

• H₂C=CH-$\underset{\underset{\mathrm{Cl}}{|}}{\mathrm{C}}$=CH and H₂C=CH-CH=CH₂

• H₂C=CH-CH=CH₂ and H₅C₆-CH=CH₂

What is the role of bithional in toilet soaps?

• it controls the pH of the skin and do not harm it

• it reduces the odours produced by bacterial decomposition of organic matter

• it helps in improving the colour of the skin

• it act like an antihistamine

The true statement regarding sucralose is:

• trichloro derivative of sucrose

• it does not provide calories

• it is stable at cooking temperature

• All of the above

A compound is soluble in conc. H₂SO₄ . It does not decolourise bromine in CCL₄ but in oxidised by chromic anhydride in aqueous H₂SO₄ with 2s , turning orange solution to blue green , afterward opaque. The original solution contains :

• a primary alcohol

• a secondary alcohol

• a tertiary alcohol

• an ether