The order of reactivity of Phenol (1), Nitrobenzene (2) and Benzene (3) towards nitration is

1.  (3)>(1)>(2)

2.  (2)>(3)>(1)

3.  (1)>(3)>(2)

4.  (1)>(2)>(3)

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4
Correct Answer :

(1)>(3)>(2)


Explanation :
No Explanation available for this question

Which one of the following exhibits enantiomerism

1.  BrCH2 - CH2- C H2 - C H2Br

2.  

3.  H3C – CH2 – CH2 – CH2Br

4.  H3C – CH2 – CBr2- CH3

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4
Correct Answer :


Explanation :
No Explanation available for this question

Phosgene is formed slowly from which one of the following on exposure to air and sunlight

1.  CHCl3

2.  H3C Cl

3.  H3C OH

4.  C2H5Cl

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4
Correct Answer :

CHCl3


Explanation :
No Explanation available for this question

The reagent used in the Wolff-Kishner reduction is:

1.  H2N _ NH2/KOH

2.  H2/Ni

3.  Sn/HCl

4.  LiAlH4

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4
Correct Answer :

H2N _ NH2/KOH


Explanation :
No Explanation available for this question

The pKa values of four carboxylic acids are 4.76, 4.19, 0.23 and 3.41 respectively. The pKa value of strongest carboxylic acid among them is :

1.  4.19

2.  3.41

3.  0.23

4.  4.76

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4
Correct Answer :

0.23


Explanation :
No Explanation available for this question

Nitrobenzene on reduction using Zinc in alkaline medium results in ‘X’. The number of sigma (σ) and pi (π) bonds in ‘X' is:

1.  24 σ, 7π

2.  24σ, 6π

3.  27σ, 7π

4.  27σ, 6π

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4
Correct Answer :

27σ, 6π


Explanation :
No Explanation available for this question

Which one of the following is not a biopolymer

1.  Cellulose

2.  Nylon-6

3.  Insulin

4.  DNA

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4
Correct Answer :

Nylon-6


Explanation :
No Explanation available for this question

Which one of the following statements is not correct

1.  Except Glycine all other naturally occurring α-amino acids are optically active

2.  α-amino acids have maximum solubility at their isoelectric point

3.  A tripeptide has two peptide bonds

4.  α-amino acids exist as Zwitter ions

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4
Correct Answer :

α-amino acids have maximum solubility at their isoelectric point


Explanation :
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The volume in ml. of 0.1 M solution of NaOH required to completely neutralize 100 ml. of 0 3 M solution of H3PO3 is ;

1.  60

2.  600

3.  300

4.  30

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4
Correct Answer :

600


Explanation :
No Explanation available for this question

Which one of the following is an artificial sweetening agent

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question
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