Which statement about the aldol condensation is correct ?

1. A Lewis acid is commonly used as a catalyst

2. The initial step is probably the formation of a carbanion

3. A Lewis base is employed to induce carbocation formation 

4. The carbon chain is lengthened through the elimination of 1 mole of water

एल्डोल संघनन के बारे में कौन सा कथन सही है?

1. एक लुईस अम्ल सामान्यत: उत्प्रेरक के रूप में उपयोग किया जाता है

2. प्रारंभिक पद संभवतः एक कार्बऋणायन का निर्माण है

3. एक लुईस अम्ल को कार्बधनायन निर्माण को प्रेरित करने के लिए उपयोग किया जाता है

4. कार्बन श्रृंखला को 1 मोल जल के विलोपन के माध्यम से लंबा किया जाता है

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The compound A gives following reactions.

Its structure can be

(1)  
(2)
(3)
(4)

यौगिक A निम्नलिखित अभिक्रियाएँ देता है।

इसकी संरचना हो सकती है

(1)  
(2)
(3)
(4)

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Reactant (A) and (B) is:

1. Ph-CH2-CH=O + NH2-OH

2. Ph-CH=O + NH2-OH

3. Ph-CllO-CH3 + NH2-NH2

4. Ph-CllO-CH3 + NH2-OH

अभिकारक (A) और (B) है:

1. Ph-CH2-CH=O + NH2-OH

2. Ph-CH=O + NH2-OH

3. Ph-CllO-CH3 + NH2-NH2

4. Ph-CllO-CH3 + NH2-OH

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Ph-ClOH-CH3PCC(A)NH2-NH-CO-NH2(B)

Product (B) is :

1. Ph-ClCH3=N-NH-CllO-NH2

2. Ph-ClCH3=N-CllO-NH-NH2

3. Ph-CH=N-NlCH3-CllO-NH2

4. Ph-ClCH3=N-CllO-NH-NH2

Ph-ClOH-CH3PCCANH2-NH-CO-NH2B

उत्पाद (B) है:

1. Ph-ClCH3=N-CllO-NH-NH2

2. Ph-ClCH3=N-CllO-NH-NH2

3. Ph-CH=N-NlCH3-CllO-NH2

4. Ph-ClCH3=N-CllO-NH-NH2

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Ph-CH3CrO2Cl2(A)conc.KOHPh-CH2OH + (B)

Product (B) of above the raction is :

1. Ph-CO2H

2. Ph-CO2-

3. Ph-CHO

4. Ph-CH3

 

Ph-CH3CrO2Cl2(A)सांद्र KOHPh-CH2OH + (B)

उपरोक्त अभिक्रिया का उत्पाद (B) है:

1. Ph-CO2H

2. Ph-CO2-

3. Ph-CHO

4. Ph-CH3

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Above compounds can be differentiated by following reagent:

1. 2-4 DNP (Brady reagent)

2. Tollen's reagent

3. Bromine water reagent

4. NaHSO3

उपरोक्त यौगिकों को निम्नलिखित अभिकर्मक द्वारा विभेदित किया जा सकता है:

1. 2-4 DNP (ब्रैडी अभिकर्मक)

2. टॉलेन अभिकर्मक

3. ब्रोमीन जल अभिकर्मक

4. NaHSO3

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Which of the following acid remains unaffected on heating ?

(1) malonic acid

(2) maleic acid

(3) Fumaric acid

(4) Succinic acid

निम्नलिखित में से कौन सा अम्ल गर्म करने पर अप्रभावित रहता है?

(1) मैलोनिक अम्ल 

(2) मैलेइक अम्ल

(3) फ्यूमेरिक अम्ल

(4) सक्सिनिक अम्ल

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Product (B) of the reaction is :

(a) Ph-CH2-NO2

(b) Ph-CH2-ONO

(c) Ph-CHO

(d) Ph-O-N=O

अभिक्रिया का उत्पाद (B) है:

(a) Ph-CH2-NO2

(b) Ph-CH2-ONO

(c) Ph-CHO

(d) Ph-O-N=O

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In the reaction

1.NaOH/Br2

                                            

the structure of the product T is :

1. 

2. 

3. 

4. 

अभिक्रिया में

उत्पाद T की संरचना है:

1. 

2. 

3. 

4. 

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Ph-CH2-CN(2)CH3-CO-Cl(3) H3O/(1)EtONA (P); Product (p) of the reaction will be :

1. Ph-CH2-CO-H

2. Ph-CH2-CO-CH3

3. Ph-CHCH3l-CO-H

4. Ph-CHCH3l-CO-CH3

Ph-CH2-CN(2)CH3-CO-Cl(3) H3O/(1)EtONA(P), अभिक्रिया का उत्पाद (P) होगा:

1. Ph-CH2-CO-H

2. Ph-CH2-CO-CH3

3. Ph-CHCH3l-CO-H

4. Ph-CHCH3l-CO-CH3

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