Hyperconjugation involves overlap of the following orbitals:

(1) σ - σ

(2) σ - p

(3) p - p

(4) π - π

अतिसंयुग्मन के अतिव्यापन में निम्न कक्षक शामिल हैं:

1. σ - σ

2. σ - p

3.  p - p

4. π - π

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The number of optical isomers of pent-3-en-2-ol is:

1. 2             

2. 4

3. 8             

4. 16

पेन्ट-3-ईन-2-ऑल के प्रकाशिक समावयवियों की संख्या है:

1. 2            2. 4

3. 8           4. 16

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The group named as benzal possesses .... nature.

1. monovalent 

2. bivalent

3. trivalent

4. tetravalent

बेन्जल रूप में नामित समूह में  .... प्रकृति होती है।

1. एकसंयोजी 

2. द्विसंयोजी

3. त्रिकसंयोजी 

4. चतुष्कसंयोजी 

 59%

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Which of the following structures permits cis-trans isomerism?

(1) X2C=CY2

(2) XYC=CZ2

(3) X2C=CXY

(4) XYC=CXY

निम्नलिखित में से कौन सी संरचना समपक्ष-विपक्ष समावयवता दर्शाती है?

1. X2C=CY2

2. XYC = CZ2

3. X2C=CXY

4. XYC = CXY

 55%

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A compound of molecular formula C7H16 shows optical isomerism, the compound will be

(1) 2,3-dimethyl pentane 

(2) 2,2-dimethyl butane 

(3) 2-methyl hexane 

(4) None of the above

अणुसूत्र C7H16 का एक यौगिक प्रकाशिक समावयवता दर्शाता है, यौगिक होगा:

1. 2, 3-डाइमेथिल पेन्टेन

2. 2, 2-डाइमेथिल ब्यूटेन

3. 2-मेथिल हेक्सेन

4. उपरोक्त में से कोई नहीं

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The +I.E.(inductive effect) is shown by:

(1) CH3

(2) -OH

(3) F

(4) -C6H5

+ I.E (प्रेरणिक प्रभाव) निम्न द्वारा दिखाया गया है:

(1) CH3

(2) -OH

(3) F

(4) -C6H5

 57%

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Which of the following acids has the smallest dissociation constant?

(1) CH3CHFCOOH

(2) FCH2CH2COOH

(3) BrCH2CH2COOH

(4) CH3CHBrCOOH

निम्नलिखित में से किस अम्ल में सबसे कम वियोजन स्थिरांक होता है?

1. CH3CHFCOOH

2. FCH2CH2COOH

3. BrCH2CH2COOH

4. CH3CHBrCOOH

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The cylindrical shape of an alkyne is due to 

(1) three sigma C-C bonds

(2) three π C-C bonds

(3) two sigma C-C and one π C-C bonds

(4) one sigma C-C and two π C-C bonds

एक एल्काइन की बेलनाकार आकृति निम्न कारण से होती है:

1. तीन सिग्मा C-C बंध  

2. तीन π C-C बंध  

3. दो सिग्मा C-C और एक π C-C बंध  

4. एक सिग्मा C-C और दो π C-C बंध  

 57%

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The shortest C-C bond distance is found in               

(1) diamond             

(2) ethane

(3) benzene             

(4) acetylene

सबसे छोटी C-C बंध दूरी निम्न में पाई जाती है:

1. हीरा         

2. एथेन

3. बेन्जीन         

4. एसीटिलीन

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Among the following compounds, the strongest acid is

1. HC≡CH              2. C6H6

3. C2H6                4. CH3OH

निम्नलिखित यौगिकों में, सबसे प्रबल अम्ल है:

1. HC≡CH              2. C6H6

3. C2H6                4. CH3OH

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