(C) The iodoform test is given by compounds containing the $CH_3CO-$ group or compounds that can be oxidized to this group (like ethanol or secondary

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(C) The iodoform test is given by compounds containing the $CH_3CO-$ group or compounds that can be oxidized to this group (like ethanol or secondary alcohols with a methyl group). Isobutanal is $(CH_3)_2CHCHO$. It does not contain the $CH_3CO-$ group,so it does not give the iodoform test. The reason provided is incorrect because isobutanal does have an $\alpha$-hydrogen atom (the hydrogen attached to the carbon adjacent to the carbonyl group). Therefore,the Assertion is correct,but the Reason is incorrect.

Class 12 Chemistry 1 Aldehydes, Ketones and Carboxylic Acids: Aldehydes and Ketones Properties

Medium

Assertion : Isobutanal does not give iodoform test.
Reason : It does not have $\alpha - $ hydrogen.

AIIMS 2004 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

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1 Aldehydes, Ketones and Carboxylic Acids: Aldehydes and Ketones

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Properties

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The major product of the following reaction is:

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An organic compound '$X$' having molecular formula $C_5H_{10}O$ yields phenylhydrazone and gives negative response to the iodoform test and Tollens' test. It produces $n-$pentane on reduction. '$X$' could be

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Match the reactions given in Column-$I$ with the suitable reagents given in Column-$II$.

Column-$I$ (Reactions) Column-$II$ (Reagents)

$(A).$ Benzophenone $\to$ Diphenylmethane $(1).$ $LiAlH_4$

$(B).$ Benzaldehyde $\to$ $1-$Phenylethanol $(2).$ $DiBAL-H$

$(C).$ Cyclohexanone $\to$ Cyclohexanol $(3).$ $Zn(Hg) / \text{Conc. } HCl$

$(D).$ Phenyl benzoate $\to$ Benzaldehyde $(4).$ $CH_3MgBr$

Column-$I$ (Reactions)	Column-$II$ (Reagents)
$(A).$ Benzophenone $\to$ Diphenylmethane	$(1).$ $LiAlH_4$
$(B).$ Benzaldehyde $\to$ $1-$Phenylethanol	$(2).$ $DiBAL-H$
$(C).$ Cyclohexanone $\to$ Cyclohexanol	$(3).$ $Zn(Hg) / \text{Conc. } HCl$
$(D).$ Phenyl benzoate $\to$ Benzaldehyde	$(4).$ $CH_3MgBr$

Medium

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Which pair never represents $X$ and $Y$ in the following reaction?
Reaction: $X \xrightarrow{Y} CHCl_3 + Z$

Medium

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Compound $A$ $(C_3H_6O)$ undergoes the following reactions to form $B$ and $C$. Identify $A, B$ and $C$.

MediumTS EAMCET 2012

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Assertion : Isobutanal does not give iodoform test. Reason : It does not have $\alpha - $ hydrogen.

Similar Questions

The major product of the following reaction is:

An organic compound '$X$' having molecular formula $C_5H_{10}O$ yields phenylhydrazone and gives negative response to the iodoform test and Tollens' test. It produces $n-$pentane on reduction. '$X$' could be

Which pair never represents $X$ and $Y$ in the following reaction?Reaction: $X \xrightarrow{Y} CHCl_3 + Z$

Compound $A$ $(C_3H_6O)$ undergoes the following reactions to form $B$ and $C$. Identify $A, B$ and $C$.

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Assertion : Isobutanal does not give iodoform test.
Reason : It does not have $\alpha - $ hydrogen.

Which pair never represents $X$ and $Y$ in the following reaction?
Reaction: $X \xrightarrow{Y} CHCl_3 + Z$