The first spectral line in the pfund series of hydrogen spectrum is given by(RH=Rydberg constant)

1.  9RH/400

2.  56RH/36

3.  11RH/900

4.  7RH/144

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4
Correct Answer :

11RH/900


Explanation :
No Explanation available for this question

6C12 and 1T3 are formed in nature due to the nuclear reaction of neutron with:

1.  7N14

2.  6C13

3.  2He4

4.  3Li6

View Answer  
4
Correct Answer :

<sub>7</sub>N<sup>14</sup>


Explanation :
No Explanation available for this question

Exhausted permutit does not contain .... ion :

1.  Na+

2.  Mg2+

3.  Al3+

4.  Si4+

View Answer  
4
Correct Answer :

Na<sup>+</sup>


Explanation :
No Explanation available for this question

Which one of the following is a secondary alcohol

1.  2-methyl-1- propanol

2.  2-methyl-2-propanol

3.  2-butanol

4.  1-butanol

View Answer  
4
Correct Answer :

2-butanol


Explanation :
No Explanation available for this question

In which of the following reactions, the concentration of product is higher than the concentration of reactant at equilibrium (k = equilibrium constant)

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The electrochemical equivalent of a metal is 'x' g. coulomb-1. The equivalent weight of metal is :

1.  x

2.  

3.  x/96500

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The correct structure of 4-bromo 3-methyl-but-1-ene:

1.  Br - CH = C(CH3)2

2.  CH2 = CH - CH(CH3) - CH2Br

3.  CH2 = C(CH3)CH2CH2Br

4.  CH3 - C(CH3) = CHCH2 -Br

View Answer  
4
Correct Answer :

CH<sub>2</sub> = CH - CH(CH<sub>3</sub>) - CH<sub>2</sub>Br


Explanation :
No Explanation available for this question

In the hardening stage of plaster of paris, the compound formed is :

1.  CaSO4

2.  orthorhombic CaSO4. 2H2O

3.  CaSO4. H2O

4.  monoclinic CaSO4. 2H2O

View Answer  
4
Correct Answer :

monoclinic CaSO<sub>4</sub>. 2H<sub>2</sub>O


Explanation :
No Explanation available for this question

The IUPAC name of an unsymmetrical ether with the molecular formula C4H10O:

1.  ethoxy propane

2.  methoxy ethane

3.  ethoxy ethane

4.  methoxy propane

View Answer  
4
Correct Answer :

methoxy propane


Explanation :
No Explanation available for this question

Which of the following pairs of ions are colourless

1.  Ti3+, Cu2+

2.  Sc3+, Zn2+

3.  Co2+, Fe3+

4.  Ni2+, V3+

View Answer  
4
Correct Answer :

Sc<sup>3+</sup>, Zn<sup>2+</sup>


Explanation :
No Explanation available for this question
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