Acetaldehyde reacts with PCl5, to give:

(1) ethyl chloride

(2) ethylene chloride

(3) ethylidene dichloride

(4) trichloroacetaldehyde

एसिटैल्डिहाइड PClके साथ अभिक्रिया कर, देता है:

1. एथिल क्लोराइड

2. एथिलीन क्लोराइड

3. एथिलिडीन डाइक्लोराइड

4. ट्राइक्लोरोएसिटैल्डिहाइड

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Identify the product (c) in the series

CH3CNNa/C2H5OHAHNO2BKMnO4,H+C

1. CH3COOH

2. CH3CH2NHOH

3. CH3CONH2

4. CH3CHO

श्रृंखला में उत्पाद (C) को पहचानिए 

CH3CNNa/C2H5OHAHNO2BKMnO4,H+C

1. CH3COOH

2. CH3CH2NHOH

3. CH3CONH2

4. CH3CHO

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Hints

Which of the following acid is most easily decarboxylate :-

(1)

(2)

(3)

(4)

निम्नलिखित में से कौन सा अम्ल सबसे आसानी से विकार्बोक्सिलीकृत होता है:- 

(1)

(2)

(3)

(4)

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The compound which on reduction with LiAlH4 gives two diffrent alcohols:

1. CH3COOCH3                         

2.  CH3COOC2H5

3. CH3COCH3                           

4.  CH3CHO

यौगिक जो LiAlH4 के साथ अपचयन पर दो भिन्न एल्कोहॉल देता है:

1. CH3COOCH3

2. CH3COOC2H5

3. CH3COCH3  

4. CH3CHO

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Hints

CH3-cCHdil. H2SO4HgSO4(A)

CH3-cCH(2) H2SO4/HO-(1)BH3THF(B)

Product (A) and (B) is differentiated by:

1. 2-4 DNP

2. NaOI

3. Na-metal

4. NaHSO3

CH3-cCHतनु H2SO4HgSO4(A)

CH3-cCH(2) H2SO4/HO-(1)BH3THF(B)

उत्पाद (A) और (B) द्वारा विभेदित किया जाता है:

1. 2-4 DNP

2. NaOI

3. Na-धातु 

4. NaHSO3

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Hints

The end products of following reaction would be,

(1)  
(2)
(3)
(4)

निम्नलिखित अभिक्रिया के अंतिम उत्पाद होंगे,

(1)  
(2)
(3)
(4)

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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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Hints

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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Hints

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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