28490 In the following reaction sequence the major products \(A\) and \(B\) are

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28491 The increasing order of the acidity of the \(\alpha\)$-$hydrogen of the following compounds is :

28492 Reaction of an inorganic sulphite \(X\) with dilute \(H _{2} SO _{4}\) generates compound \(Y\). Reaction of \(Y\) with \(NaOH\) gives \(X\). Further, the reaction of \(X\) with \(Y\) and water affords compound \(Z\). \(Y\) and \(Z ,\) respectively, are:

28525 Which one of the following compounds will give orange precipitate when treated with \(2,4-\) dinitrophenyl hydrazine?

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3

4

28490 In the following reaction sequence the major products \(A\) and \(B\) are

1

2

3

4

28491 The increasing order of the acidity of the \(\alpha\)$-$hydrogen of the following compounds is :

28492 Reaction of an inorganic sulphite \(X\) with dilute \(H _{2} SO _{4}\) generates compound \(Y\). Reaction of \(Y\) with \(NaOH\) gives \(X\). Further, the reaction of \(X\) with \(Y\) and water affords compound \(Z\). \(Y\) and \(Z ,\) respectively, are:

28525 Which one of the following compounds will give orange precipitate when treated with \(2,4-\) dinitrophenyl hydrazine?

1

2

3

4

28490 In the following reaction sequence the major products \(A\) and \(B\) are

1

2

3

4

28491 The increasing order of the acidity of the \(\alpha\)$-$hydrogen of the following compounds is :

28492 Reaction of an inorganic sulphite \(X\) with dilute \(H _{2} SO _{4}\) generates compound \(Y\). Reaction of \(Y\) with \(NaOH\) gives \(X\). Further, the reaction of \(X\) with \(Y\) and water affords compound \(Z\). \(Y\) and \(Z ,\) respectively, are:

28525 Which one of the following compounds will give orange precipitate when treated with \(2,4-\) dinitrophenyl hydrazine?

1

2

3

4

28490 In the following reaction sequence the major products \(A\) and \(B\) are

1

2

3

4

28491 The increasing order of the acidity of the \(\alpha\)$-$hydrogen of the following compounds is :

28492 Reaction of an inorganic sulphite \(X\) with dilute \(H _{2} SO _{4}\) generates compound \(Y\). Reaction of \(Y\) with \(NaOH\) gives \(X\). Further, the reaction of \(X\) with \(Y\) and water affords compound \(Z\). \(Y\) and \(Z ,\) respectively, are:

28525 Which one of the following compounds will give orange precipitate when treated with \(2,4-\) dinitrophenyl hydrazine?

1

2

3

4