Identify the correct option regarding the dis | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Option $(B)$ is correct. $PhCHO$ (Benzaldehyde) does not contain an $\alpha$-methyl group,so it does not give a positive Tollen's test for silver

Vedclass · Accepted Answer

Pair of compounds: $(I) PhCHO, (II) CH_3CHO$. Reagent: Tollen's reagent $(AgNO_3 + NH_4OH)$. Response: $(II)$ forms a silver mirror,$(I)$ does not.

Vedclass · Answer

(B) Option $(B)$ is correct. $PhCHO$ (Benzaldehyde) does not contain an $\alpha$-methyl group,so it does not give a positive Tollen's test for silver mirror formation in the same way as aliphatic aldehydes,but more importantly,$CH_3CHO$ (Acetaldehyde) is an aliphatic aldehyde that readily reduces Tollen's reagent to form a silver mirror. Option $(A)$ is incorrect because $HCHO$ does not have an $\alpha$-methyl group and does not give the iodoform test,while $CH_3CHO$ does. Option $(C)$ is incorrect because both glucose and fructose react with bromine water (fructose isomerizes to glucose in basic/neutral conditions or reacts via enediol). Option $(D)$ is incorrect because $2,4-DNP$ reacts with all carbonyl compounds (aldehydes and ketones),so it cannot distinguish between them.

$A$. Lucas reagent	$I$. $SnCl_2 + HCl$
$B$. Clemmensen reagent	$II$. $[Ag(NH_3)_2]^+$
$C$. Tollen's reagent	$III$. Anhydrous $ZnCl_2 + conc. HCl$
$D$. Stephen reagent	$IV$. $Zn-Hg/HCl$

Identify the correct option regarding the distinction between pairs of compounds.

Similar Questions

Identify the product formed when $Hex-3-enenitrile$ is reduced with diisobutylaluminium hydride $(DIBAL-H)$ followed by acid hydrolysis?

The major product of the following reaction is:

Match the following:
$A$. Lucas reagent $I$. $SnCl_2 + HCl$
$B$. Clemmensen reagent $II$. $[Ag(NH_3)_2]^+$
$C$. Tollen's reagent $III$. Anhydrous $ZnCl_2 + conc. HCl$
$D$. Stephen reagent $IV$. $Zn-Hg/HCl$

Product $A$ is

Find the end product of the following reaction:
Product is

Vedclass Test Series

Exam Paper Generator

Online Exam Module