Aldehydes, Ketones and Carboxylic Acids

An organic compound 'X' having molecular formula C5H10O yields phenylhydrazone and gives negative response to the iodoform test and Tollens' test. It produces n-pentane on reduction. 'X' could be

1. 3-pentanone
2. n-amyl alcohol
3. pentanal
4. 2-pentanone

Which one is most reactive towards nucleophilic addition reaction?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Reaction by which benzaldehyde cannot be prepared

1. [figure] + CO + HCl in presence of anhydrous AlCl3
2. [figure] + Zn/Hg and conc. HCl
3. [figure] + CrO2Cl2 in CS2 followed by H3O+
4. [figure] + H2 in presence of Pd-BaSO4

In the following reaction: HC CH [Hg2+]H2SO4 'P' Product 'P' will not give

1. Tollen's reagent test
2. Brady's reagent test
3. Victor Meyer test
4. Iodoform test

Consider the reaction : RCHO + NH2NH2 RCH = N - NH2 What sort of reaction is it?

1. Electrophilic addition-elimination reaction
2. Free radical addition-elimination reaction
3. Electrophilic substitution-elimination reaction
4. Nucleophilic addition-elimination reaction

Which of the following compounds will give a yellow precipitate with iodine and alkali?

1. Acetophenone
2. Methyl acetate
3. Acetamide
4. 2-Hydroxypropane

Consider the following reaction [figure] The product A is

1. C6H5CHO
2. C6H5OH
3. C6H5COCH3
4. C6H5Cl

In the following sequence of reactions CH3-Br KCNA H3O+B [ether]LiAlH4C the end product (C) is

1. acetone
2. methane
3. acetaldehyde
4. ethyl alcohol

CH3CHO and C6H5CH2CHO can be distinguished chemically by

1. Benedict's test
2. Iodoform test
3. Tollens' reagent test
4. Fehling's solution test

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is

1. B > A > D > C
2. B > D > C > A
3. A > B > C > D
4. A > C > B > D