Question 1

Paragraph I: An organic compound $ P $ with molecular formula $ C _9 H _ 18 O _2$ decolorizes bromine water and also shows positive iodoform test. $ P $ on ozonolysis followed by treatment with

Accepted Answer

S \& ~T shows + ve idoform test. Total oxygen atoms present in S , T are =1+1=2 Ans. 2

Question 2

Paragraph I: An organic compound $ P $ with molecular formula $ C _5 H _ 18 O _2$ decolorizes bromine water and also shows positive iodoform test. $ P $ on ozonolysis followed by treatment with

Accepted Answer

S~ \& ~T shows + ve idoform test. Rmf C _5 H _ 10 O _3 (M. wt )_ R =70+48=118 Q mf C _4 H _8 O _3( M . wt )_ Q =56+48=104 500 mole Q +500 mole R [ polymer ] Condensation aligned U molecular weight & =500 118+500 104-999 18=500 222-17982 \ & =111000-17982=93018 aligned Ans. is 93018

Question 3

In the following reactions, P, Q, R and S are the major products. The correct statement(s) about P, Q, R and S is(are)

Accepted Answer

The cyanide part undergoes reaction with phenyl magnesium bromide followed by acidic water give a ketone. The ketone undergoes reaction with phenyl magnesium bromide again to get a tertiary alcohol. Benzene undergo Friedel craft acylation and gives acetophenone. Acetophenone gives a tertiary alcohol upon reaction with phenyl magnesium bromide. Propanoyl chloride when treated with dibenzyl cadmium gives a ketone. The ketone give tertiary alcohol on reaction with phenyl magnesium bromide. 2-phenyl

Question 4

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option.   List I   L

Accepted Answer

Toluene is formed in the Friedel Craft's reaction, which is the reactant in Etard reaction. The Etard reaction is a chemical reaction that involves the direct oxidation of an aromatic or heterocyclic bound methyl group to an aldehyde using chromyl chloride.  Aniline on diazotization reaction gives benzene diazonium salt, which is the starting material for Gattermann reaction. Gattermann reaction is used for obtaining chlorobenzene or bromobenzene from benzenediazonium chloride by treati

Question 5

In the reaction scheme shown below, Q , R , and S are the major products. The correct structure of

Accepted Answer

Answer option index: 3

Question 6

Total number of hydroxyl groups present in a molecule of the major product P is ______

Accepted Answer

Answer option index: 0

Question 7

List - I includes starting materials and reagents of selected chemical reactions. List - II gives structures of compounds that may be formed as intermediate products and/or final products from the rea

Accepted Answer

A B C D

Question 8

List-I includes starting materials and reagents of selected chemical reactions. List-II gives structures of compounds that may be formed as intermediate products and/or final products from the reactio

Accepted Answer

A B C D

Aldehydes and Ketones — Previous Year Questions & Solutions