The aldol condensation of acetaldehyde results in hte formation of:

1. ${\mathrm{CH}}_3<mspace\; width="1em"></mspace>\mathrm{C}<mspace\; width="1em"></mspace>{\mathrm{CHCH}}_3$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\left|\right|<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>|$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{O}<mspace\; width="1em"></mspace>\mathrm{OH}$

2. ${\mathrm{CH}}_3<mspace\; width="1em"></mspace>{\mathrm{CHCH}}_2<mspace\; width="1em"></mspace>\mathrm{CH}$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>|<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>||$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{OH}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{O}$

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}—\mathrm{CH}$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>|<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>||$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{OH}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{O}$

4. ${\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}+\mathrm{COOH}$

एसीटैल्डिहाइड के एल्डोल संघनन के परिणामस्वरूप निर्मित होता है:

1. ${\mathrm{CH}}_3<mspace\; width="1em"></mspace>\mathrm{C}<mspace\; width="1em"></mspace>{\mathrm{CHCH}}_3$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\left|\right|<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>|$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{O}<mspace\; width="1em"></mspace>\mathrm{OH}$

2. ${\mathrm{CH}}_3<mspace\; width="1em"></mspace>{\mathrm{CHCH}}_2<mspace\; width="1em"></mspace>\mathrm{CH}$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>|<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>||$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{OH}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{O}$

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}—\mathrm{CH}$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>|<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>||$
$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{OH}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{O}$

4. ${\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}+\mathrm{COOH}$

A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of $\mathrm{\alpha }$-hydroxy acid. The carbonyl compound is

1. acetaldehyde                             

2. acetone

3. diethyl ketone                           

4. formaldehyde                              

एक कार्बोनिल यौगिक हाइड्रोजन साइनाइड के साथ अभिक्रिया कर साइनोहाइड्रिन निर्मित करता है जो जलअपघटन पर $\mathrm{\alpha }$-हाइड्रॉक्सी अम्ल का एक रेसिमिक मिश्रण निर्मित करता है। कार्बोनिल यौगिक है

1. एसीटैल्डिहाइड     

2. एसीटोन

3. डाइएथिल कीटोन   

4. फार्मेल्डिहाइड 

Consider the following reaction;

CH₃Br + Mg $\stackrel{\mathrm{Ether}}{\to }$A$\stackrel{\mathrm{HCHO}}{\to }$B$\stackrel{\mathrm{HOH}}{\to }$C

compound C is:

1. acetic acid                             

2. acetaldehyde

3. ethyl alcohol                           

4. formic acid

निम्नलिखित अभिक्रिया पर विचार कीजिए;

CH₃Br + Mg $\stackrel{\text{ईथर}<mspace\; width="1em"></mspace>}{\to }$A$\stackrel{\mathrm{HCHO}}{\to }$B$\stackrel{\mathrm{HOH}}{\to }$C

यौगिक C है:

1. एसीटिक अम्ल   

2. एसीटैल्डिहाइड

3. एथिल एल्कोहॉल

4. फॉर्मिक अम्ल

Which $\mathrm{\beta }$-keto acid shown will not undergo decarboxylation ?

(a)              (b) 

(c)    $$\begin{gathered} <mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>O \\ <mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\left|\right| \\ Ph-C-C{H}_2-C{O}_{2}H \end{gathered}$$   (d) $$\begin{gathered} <mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>O \\ <mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\left|\right| \\ C{H}_2-C-C{H}_2-C{O}_{2}H \end{gathered}$$

दिखाया गया कौन सा $\mathrm{\beta }$-कीटो अम्ल विकार्बोक्सिलीकृत नहीं होगा?

(a)           (b)

(c)    (d)

Final product is

(1)
(2)
(3)
(4)

अंतिम उत्पाद है

(1)
(2)
(3)
(4)

In which of the following compounds O¹⁸ exchange can be observed on keeping it in H₂O¹⁸

(1)
(2)
(3)
(4)

निम्नलिखित में से किस यौगिक में H₂O¹⁸ में रखने पर O¹⁸  विनिमय देखा जा सकता है

(1)
(2)
(3)
(4)

The IUPAC name of the CH₃COCH(CH₃)₂ is:

1. 4-methyl isopropyl ketone

2. 3-methyl-2-butanone

3. isopropylmethyl ketone

4. 2-methyl-3-butanone

CH₃COCH(CH₃)₂ का IUPAC नाम है:

1. 4-मेथिल आइसोप्रोपिल कीटोन

2. 3-मेथिल-2-ब्यूटेनोन 

3. आइसोप्रोपिलमेथिल कीटोन

4. 2-मेथिल-3-ब्यूटेनोन 

Reagent to carry out above conversion,P,Q,R respectively are:

1. H₂C=CH-CH₂-Br,(HO^{$\mathrm{\theta }$}),[HO^{$\mathrm{\theta }$},$∆$], Wacker-process

2. H₂C=CH-CH₂-Br(HO^{$\mathrm{\theta }$}), Wacker-process, HO^{$\mathrm{\theta }$},$∆$

3. Wacker process, H₂C=CH-CH₂-Br(HO^{$\mathrm{\theta }$}),HO^{$\mathrm{\theta }$}($∆$)

4. Wacker process,HO^{$\mathrm{\theta }$}($∆$), H₂C=CH-CH₂-Br(HO^{$\mathrm{\theta }$})

क्रमशः उपरोक्त रूपांतरण को संपन्न करने के लिए P, Q, R अभिकर्मक हैं:

1. H₂C=CH-CH₂-Br,(HO^{$\mathrm{\theta }$}),[HO^{$\mathrm{\theta }$},$∆$], वाकर-प्रक्रम 

2. H₂C=CH-CH₂-Br(HO^{$\mathrm{\theta }$}), वाकर-प्रक्रम, HO^{$\mathrm{\theta }$},$∆$

3. वाकर प्रक्रम, H₂C=CH-CH₂-Br(HO^{$\mathrm{\theta }$}),HO^{$\mathrm{\theta }$}($∆$)

4. वाकर प्रक्रम, HO^{$\mathrm{\theta }$}($∆$), H₂C=CH-CH₂-Br(HO^{$\mathrm{\theta }$})

Product (A) and (C) is :

1.

2. 

3.

4.

उत्पाद (A) और (C) है:

1.

2. 

3.

4.

Identify C in the following sequence of reactions :

(1)
(2)
(3)
(4)

अभिक्रियाओं के निम्नलिखित अनुक्रम में C की पहचान कीजिए:

(1)
(2)
(3)
(4)