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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323478 The reagent with which both acetaldehyde and acetone react is

1 Fehling's solution

2

I_{2} / NaOH

3 Tollen's reagent

4 Carbonic acid.

Explanation:

Due to presence of
supporting img

and

react with iodine in $NaOH$ to from yellow ppt. of iodoform.

KCET - 2011

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323479 Iodoform can be prepared from all, except

1 Butan-2-one

2 Acetophenone

3 Propan-2-ol

4 Propan-1-ol.

Explanation:

Iodoform can be prepared from compounds containing ${CH}_{3} CO -$ group or
supporting img

Propan-1-ol does not contain any such group.

KCET - 2015

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323480 Which of the following organic compounds answers to both Iodoform test and Fehling's test?

1 Ethanal

2 Propanone

3 Ethanol

4 Methanal

Explanation:

Acetaldehyde (ethanal) gives red ppt. with Fehling solution.
$\begin{array}{r} {CH}_{3} CHO + \underset{Fehling solution}{2 Cu (OH)_{2}} + 2 NaOH \to \\ {CH}_{3} COONa + \underset{Red ppt.}{{Cu}_{2} O} + 3 H_{2} O \end{array}$
Ethanal also gives yellow ppt. with an alkaline solution of iodine (Iodoform test).
$\begin{aligned} {CH}_{3} CHO + 4 NaOH + 3 I_{2} \to \\ \underset{Yellow ppt.}{{CHI}_{3}} + HCOONa + 3 H_{2} O + 3 NaI \end{aligned}$

KCET - 2008

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323481 Which of the following compounds will give a yellow precipitate with iodine and alkali?

1 Acetophenone

2 Methyl acetate

3 Acetamide

4 Pentan -3 - one

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323482 Which of the major product formed when acetone is heated with iodine and potassium hydroxide?

1 Iodoacetone

2 Acetic acid

3 Iodoform

4 Acetophenone

JEE - 2014

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323478 The reagent with which both acetaldehyde and acetone react is

1 Fehling's solution

2

I_{2} / NaOH

3 Tollen's reagent

4 Carbonic acid.

Explanation:

Due to presence of
supporting img

and

react with iodine in $NaOH$ to from yellow ppt. of iodoform.

KCET - 2011

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323479 Iodoform can be prepared from all, except

1 Butan-2-one

2 Acetophenone

3 Propan-2-ol

4 Propan-1-ol.

Explanation:

Iodoform can be prepared from compounds containing ${CH}_{3} CO -$ group or
supporting img

Propan-1-ol does not contain any such group.

KCET - 2015

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323480 Which of the following organic compounds answers to both Iodoform test and Fehling's test?

1 Ethanal

2 Propanone

3 Ethanol

4 Methanal

Explanation:

Acetaldehyde (ethanal) gives red ppt. with Fehling solution.
$\begin{array}{r} {CH}_{3} CHO + \underset{Fehling solution}{2 Cu (OH)_{2}} + 2 NaOH \to \\ {CH}_{3} COONa + \underset{Red ppt.}{{Cu}_{2} O} + 3 H_{2} O \end{array}$
Ethanal also gives yellow ppt. with an alkaline solution of iodine (Iodoform test).
$\begin{aligned} {CH}_{3} CHO + 4 NaOH + 3 I_{2} \to \\ \underset{Yellow ppt.}{{CHI}_{3}} + HCOONa + 3 H_{2} O + 3 NaI \end{aligned}$

KCET - 2008

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323481 Which of the following compounds will give a yellow precipitate with iodine and alkali?

1 Acetophenone

2 Methyl acetate

3 Acetamide

4 Pentan -3 - one

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323482 Which of the major product formed when acetone is heated with iodine and potassium hydroxide?

1 Iodoacetone

2 Acetic acid

3 Iodoform

4 Acetophenone

JEE - 2014

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323478 The reagent with which both acetaldehyde and acetone react is

1 Fehling's solution

2

I_{2} / NaOH

3 Tollen's reagent

4 Carbonic acid.

Explanation:

Due to presence of
supporting img

and

react with iodine in $NaOH$ to from yellow ppt. of iodoform.

KCET - 2011

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323479 Iodoform can be prepared from all, except

1 Butan-2-one

2 Acetophenone

3 Propan-2-ol

4 Propan-1-ol.

Explanation:

Iodoform can be prepared from compounds containing ${CH}_{3} CO -$ group or
supporting img

Propan-1-ol does not contain any such group.

KCET - 2015

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323480 Which of the following organic compounds answers to both Iodoform test and Fehling's test?

1 Ethanal

2 Propanone

3 Ethanol

4 Methanal

Explanation:

Acetaldehyde (ethanal) gives red ppt. with Fehling solution.
$\begin{array}{r} {CH}_{3} CHO + \underset{Fehling solution}{2 Cu (OH)_{2}} + 2 NaOH \to \\ {CH}_{3} COONa + \underset{Red ppt.}{{Cu}_{2} O} + 3 H_{2} O \end{array}$
Ethanal also gives yellow ppt. with an alkaline solution of iodine (Iodoform test).
$\begin{aligned} {CH}_{3} CHO + 4 NaOH + 3 I_{2} \to \\ \underset{Yellow ppt.}{{CHI}_{3}} + HCOONa + 3 H_{2} O + 3 NaI \end{aligned}$

KCET - 2008

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323481 Which of the following compounds will give a yellow precipitate with iodine and alkali?

1 Acetophenone

2 Methyl acetate

3 Acetamide

4 Pentan -3 - one

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323482 Which of the major product formed when acetone is heated with iodine and potassium hydroxide?

1 Iodoacetone

2 Acetic acid

3 Iodoform

4 Acetophenone

JEE - 2014

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323478 The reagent with which both acetaldehyde and acetone react is

1 Fehling's solution

2

I_{2} / NaOH

3 Tollen's reagent

4 Carbonic acid.

Explanation:

Due to presence of
supporting img

and

react with iodine in $NaOH$ to from yellow ppt. of iodoform.

KCET - 2011

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323479 Iodoform can be prepared from all, except

1 Butan-2-one

2 Acetophenone

3 Propan-2-ol

4 Propan-1-ol.

Explanation:

Iodoform can be prepared from compounds containing ${CH}_{3} CO -$ group or
supporting img

Propan-1-ol does not contain any such group.

KCET - 2015

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323480 Which of the following organic compounds answers to both Iodoform test and Fehling's test?

1 Ethanal

2 Propanone

3 Ethanol

4 Methanal

Explanation:

Acetaldehyde (ethanal) gives red ppt. with Fehling solution.
$\begin{array}{r} {CH}_{3} CHO + \underset{Fehling solution}{2 Cu (OH)_{2}} + 2 NaOH \to \\ {CH}_{3} COONa + \underset{Red ppt.}{{Cu}_{2} O} + 3 H_{2} O \end{array}$
Ethanal also gives yellow ppt. with an alkaline solution of iodine (Iodoform test).
$\begin{aligned} {CH}_{3} CHO + 4 NaOH + 3 I_{2} \to \\ \underset{Yellow ppt.}{{CHI}_{3}} + HCOONa + 3 H_{2} O + 3 NaI \end{aligned}$

KCET - 2008

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323481 Which of the following compounds will give a yellow precipitate with iodine and alkali?

1 Acetophenone

2 Methyl acetate

3 Acetamide

4 Pentan -3 - one

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323482 Which of the major product formed when acetone is heated with iodine and potassium hydroxide?

1 Iodoacetone

2 Acetic acid

3 Iodoform

4 Acetophenone

JEE - 2014

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323478 The reagent with which both acetaldehyde and acetone react is

1 Fehling's solution

2

I_{2} / NaOH

3 Tollen's reagent

4 Carbonic acid.

Explanation:

Due to presence of
supporting img

and

react with iodine in $NaOH$ to from yellow ppt. of iodoform.

KCET - 2011

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323479 Iodoform can be prepared from all, except

1 Butan-2-one

2 Acetophenone

3 Propan-2-ol

4 Propan-1-ol.

Explanation:

Iodoform can be prepared from compounds containing ${CH}_{3} CO -$ group or
supporting img

Propan-1-ol does not contain any such group.

KCET - 2015

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323480 Which of the following organic compounds answers to both Iodoform test and Fehling's test?

1 Ethanal

2 Propanone

3 Ethanol

4 Methanal

Explanation:

Acetaldehyde (ethanal) gives red ppt. with Fehling solution.
$\begin{array}{r} {CH}_{3} CHO + \underset{Fehling solution}{2 Cu (OH)_{2}} + 2 NaOH \to \\ {CH}_{3} COONa + \underset{Red ppt.}{{Cu}_{2} O} + 3 H_{2} O \end{array}$
Ethanal also gives yellow ppt. with an alkaline solution of iodine (Iodoform test).
$\begin{aligned} {CH}_{3} CHO + 4 NaOH + 3 I_{2} \to \\ \underset{Yellow ppt.}{{CHI}_{3}} + HCOONa + 3 H_{2} O + 3 NaI \end{aligned}$

KCET - 2008

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323481 Which of the following compounds will give a yellow precipitate with iodine and alkali?

1 Acetophenone

2 Methyl acetate

3 Acetamide

4 Pentan -3 - one

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323482 Which of the major product formed when acetone is heated with iodine and potassium hydroxide?

1 Iodoacetone

2 Acetic acid

3 Iodoform

4 Acetophenone

JEE - 2014