α-D-glucose and β D-glucose have a specific rotation of +112° and +19° respectively. In aqueous solution the rotation becomes +52°. This process is called:

(1) inversion

(2) racemisation

(3) mutarotation

(4) enolisation

α-D-ग्लूकोज और β-D-ग्लूकोज में क्रमशः +112° और +19° का विशिष्ट घूर्णन होता है। जलीय विलयन में घूर्णन +52° हो जाता है। इस प्रक्रिया को कहा जाता है:

1. प्रतिलोमन

2. रेसिमीकरण

3. परिवर्ती ध्रुवण घूर्णन

4. ईनॉलीकरण

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Total number of isomeric aldehydes and ketones that can exist with the molecular formula C5H10O:

(1) 5                       

(2) 8

(3) 6                       

(4) 7

अणुसूत्र C5H10O के साथ उपस्थित समावयवी एल्डिहाइड और कीटोन की कुल संख्या है:

(1) 5                       

(2) 8

(3) 6                       

(4) 7

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Which of the following compounds has isopropyl group?

1. 2,2,3,3-tetramethylpetane

2. 2,2-dimethylpentane

3. 2,2,3-trimethylpentane

4. 2-methylpentane

निम्नलिखित में से कौन से यौगिक में आइसोप्रोपिल समूह है?

1. 2,2,3,3-टेट्रामेथिलपेन्टेन

2. 2,2-डाइमेथिलपेन्टेन

3. 2,2,3-ट्राइमेथिलपेन्टेन

4. 2-मेथिलपेन्टेन

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Number of possible isomers of glucose are:

1. 10

2. 14

3. 16

4. 20

 

 

ग्लूकोज के संभव समावयवियों की संख्या है:

1. 10

2. 14

3. 16

4. 20

 

 

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Shifting of electrons of a multiple bond under the influence of a reagent is called:

1. I-effect

2. E-effect

3. M-effect

4. T-effect

एक अभिकर्मक के प्रभाव में एक बहु आबंध इलेक्ट्रॉनों का स्थानांतरण कहलाता है:

1. I-प्रभाव

2. E-प्रभाव

3. M-प्रभाव

4. T-प्रभाव

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The correct IUPAC name of,  is:

1. isopropyl benzene             
2. cumene
3. phenyl isopropane             
4. propan-2-yl benzene

यौगिक का सही IUPAC नाम है:

1. आइसोप्रोपिल बेन्जीन
2. क्यूमीन
3. फेनिल आइसोप्रोपेन
4. प्रोपेन-2-ईल बेन्जीन

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The compound which exhibits optical isomerism is:

(1) CH3CHOHCH3

(2) (CH3)2CHCH2CH3

(3) CH3CHClCH2CH3

(4) CH3CCl2CH2CH3

वह यौगिक जो प्रकाशिक समावयवता प्रदर्शित करता है:

(1) CH3CHOHCH3

(2) (CH3)2CHCH2CH3

(3) CH3CHClCH2CH3

(4) CH3CCl2CH2CH3

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Keto-enol tautomerism is observed in :

(1) C6H5-C||O-H

(2) C6H5-C||O-CH3

(3) C6H5-C||O-C6H5

(4) none of these

निम्न में से किसमें कीटो-ईनॉल चलावयवता प्रेक्षित होती है:

1. C6H5-C||O-H

2. C6H5-C||O-CH3

3. C6H5-C||O-C6H5

4. इनमें से कोई नहीं

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Geometrical isomerism is not shown by:

1. 

2. 

3. CH2 = CClCH3

4. CH3 - CH = CH2 - CH = CH2

ज्यामितीय समावयवता किसके द्वारा नहीं दर्शायी जाती है:

1. 

2. 

3. CH2 = CClCH3

4. CH3 - CH = CH2 - CH = CH2

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The enol form of acetone after treatment with D2O gives:

1.            OD
             |
CH3C=CH2

2.              O
             ||
CH3CCD3

3.           OH
            |
CH2=CCH2D

4.           OD
            |
CD2=CCD3

D2O के साथ उपचारित करने के बाद एसीटोन का ईनॉल रूप देता है:

1.            OD
             |
CH3C=CH2

2.              O
             ||
CH3CCD3

3.           OH
            |
CH2=CCH2D

4.           OD
            |
CD2=CCD3

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