21.

Given,


Among the following, the strongest reducing agent is

• Cr

• Mn²⁺

• Cr³⁺

• Cr³⁺

Which of the following compounds will the significant amount of meta product during mono-nitration reaction?

The increasing order of the reactivity of the following halides for the S_N1 reaction is

• (III) < (II) < (I) 

• (II) < (I) < (III)

• (I) < (III) < (II)

• (I) < (III) < (II)

The formation of which of the following polymers involves hydrolysis reaction?

• Nylon 6

• Bakelite

• Nylon 6, 6

• Nylon 6, 6

Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolourize the colour of bromine?

3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product.The number of possible stereoisomers for the product is

• Six

• Two

• Zero

• Zero

The correct sequence of reagents for the following conversion will be

• [Ag(NH₃)₂]⁺ OH^–, H⁺/CH₃OH, CH₃MgBr

• CH₃MgBr, H⁺/CH₃OH, [Ag(NH₃)₂]+ OH^–

• CH₃MgBr, [Ag(NH₃)₂]⁺ OH^–, H⁺/CH₃OH

• CH₃MgBr, [Ag(NH₃)₂]⁺ OH^–, H⁺/CH₃OH

Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?

The major product obtained in the following reaction is

• C₆H₅CH (O^tBu) CH₂C₆H₅

• C₆H₅CH=CHC₆H₅

• (+)C₆H₅CH(O^tBu)CH₂H₅

• (+)C₆H₅CH(O^tBu)CH₂H₅

The major product obtained in the following reaction is