81.

The chelating ligand used to remove excess of copper and iron in chelate therapy is

• D-penicillamine

• oxalate ion

• EDTA

• ethylenediamine

The correct decreasing order of reactivity for a given alkyl (R) group in both S_N1 and S_N2 reaction mechanisms is

• R - I > R - Br > R - Cl > R - F

• R - I > R - Cl > R - Br > R - F

• R - F > R - Cl > R - Br > R - I

• R - F > R - I > R - Cl > R - Br

Chloroform reacts with oxygen in the presence of light to give

• carbon tetrachloride

• carbonyl chloride

• methyl chloride

• acetaldehyde

Which one of the following is not expected to undergo iodoform reaction?

• Propan-2-ol

• Diphenyl methanol

• 1-phenylethanol

• 2-butanol

Which one of the following halogen compounds is difficult to be hydrolysed by S_N1 mechanism?

• Tertiary butyl chloride

• lsopropyl chloride

• Benzyl chloride

• Chlorobenzene

Which one of the following is not an allylic halide?

• 4-bromopent-2-ene

• 3-bromo-2-methylbut-1-ene

• 1-bromobut-2-ene

• 4-bromobyt-1-ene

Excess of copper in toxic proportions in plants/animals can be removed by chelating with

• EDTA

• ethane-1,2-diamine

• oxalate ion

• D-pencillamine

Which will undergo S_N2 reaction fastest among the following halogen compounds?

• CH₃CH₂F

• CH₃CH₂Cl

• CH₃CH₂Br

• CH₃CH₂I

The alkyl halide that undergoes S_N1 reaction more readily is

• t-butyl bromide

• n-propyl bromide

• vinyl bromide

• isopropyl bromide

An alkyl halide (R X) reacts with Na to form 4, 5-diethyloctane. Compound R X is

• CH₃(CH₂)₃Br

• CH₃(CH₂)₂CH(Br)CH₂CH₃

• CH₃(CH₂)₃CH(Br)CH₃

• CH₃(CH₂)₅Br