Which of the following has the isotope of

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

What are the values of n1 and n2 respectively for Hβ line in the Lyman series of hydrogen atomic spect

1.  3 and 5

2.  2 and 3

3.  1 and 3

4.  2 and 4

View Answer  
4
Correct Answer :

1 and 3


Explanation :
No Explanation available for this question

What is the catalyst used in the manufacture of sulphuric acid by contact process

1.  Nickel powder

2.  Platinised asbestos

3.  Anhydrous Al2O3

4.  Aluminium powder

View Answer  
4
Correct Answer :

Platinised asbestos


Explanation :
No Explanation available for this question

The equilibrium constant for the reaction is 64 at a certain temperature.The equilibrium concentrations of H2

1.  16

2.  4

3.  8

4.  2

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

What is the approximate quantity of electricity (in coloumbs) required to deposit all the silver from 250 mL of 1M AgNO3 aqueous

1.  96500

2.  24125

3.  48250

4.  12062.5

View Answer  
4
Correct Answer :

24125


Explanation :
No Explanation available for this question

A solid organic compound Y on heating is converted into vapour directly; which on cooling solidifies, which of the following is the correct method of purifyin

1.  Sublimation

2.  Distillation

3.  Distillation at reduced pressure

4.  Steam distillation

View Answer  
4
Correct Answer :

Sublimation


Explanation :
No Explanation available for this question

Chloroethane reacts with magnesium in dry ether to form X. When X is hydrolysed a carbon compound Y and Z are formed Which of the following is Y

1.  C2H4

2.  C2H2

3.  C3H6

4.  C6H6

View Answer  
4
Correct Answer :

C3H6


Explanation :
No Explanation available for this question

Ethylene reacted with bromine in CCl4 to form X. When X is reacted with alcoholic KOH, Y is formed. X and Y are respectively :

1.  BrCH2—CH2Br and C2H2

2.  C2H5Br and C2H4

3.  C2H5Br and C6H6

4.  C2H5Br3 and C2H4

View Answer  
4
Correct Answer :

BrCH2—CH2Br and C2H2


Explanation :
No Explanation available for this question

Which of the following reacts with ammoniacal cuprous chloride

1.  CH4

2.  C2H2

3.  C2H6

4.  C6H6

View Answer  
4
Correct Answer :

C2H2


Explanation :
No Explanation available for this question

Brass is an alloy of :

1.  Ag and Cu

2.  Sn and Zn

3.  Cu and Sn

4.  Cu and Zn

View Answer  
4
Correct Answer :

Cu and Zn


Explanation :
No Explanation available for this question
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