Which of the following has magic number of protons and neutrons

1.  8O17

2.  13Al27

3.  9F17

4.  20Ca40

View Answer  
4
Correct Answer :

<sub>20</sub>Ca<sup>40</sup>


Explanation :
No Explanation available for this question

The strongest conjugate base results from

1.  formic acid

2.  benzoic acid

3.  acetic acid

4.  acetylene

View Answer  
4
Correct Answer :

acetylene


Explanation :
No Explanation available for this question

In which of the following 1M solution is NH3 soluble

1.  NaCl

2.  NaOH

3.  HCl

4.  C2H5OH

View Answer  
4
Correct Answer :

C<sub>2</sub>H<sub>5</sub>OH


Explanation :
No Explanation available for this question

The activity of ratio altitude (X 100) is 6.023 curie. If its disintegration constant is 3.7x104 sec-1.the mass of X is:

1.  10-23 g

2.  10-15 g

3.  10-16 g

4.  10-14 g

View Answer  
4
Correct Answer :

10<sup>-15</sup> g


Explanation :
No Explanation available for this question

The ∆H value for the reaction  H2+Cl2 =2HCl is -44.12 kcal.If E1 is the activation energy of the Reactants and E2 is the activation energy of the products,then for the above reaction

1.  E1>E2

2.  E1< E2

3.  E1= E2

4.  ∆H is not related of E1>E2

View Answer  
4
Correct Answer :

E<sub>1</sub>&lt; E<sub>2 </sub>


Explanation :
No Explanation available for this question

The black image on a developed photographic film is composed of

1.  Ag

2.  AgBr

3.  Ag (S2O3)3-

4.  Ag2O

View Answer  
4
Correct Answer :

Ag (S<sub>2</sub>O<sub>3</sub>)<sup>3-</sup>


Explanation :
No Explanation available for this question

The value of Kp for the reaction 2H2S(g) ⇌ 2H2(g)+S2(g) is 1.2x10-2 at 10650C.The value of Kp for the reaction is

1.  1.2x10-2

2.  < 1.2x10-2

3.  83

4.  >1.2x10-2

View Answer  
4
Correct Answer :

&lt; 1.2x10<sup>-2</sup>


Explanation :
No Explanation available for this question

Which of the following solids will the vander waal's forces be expected to be high

1.  HBr

2.  LiBr

3.  LiCl

4.  AgBr

View Answer  
4
Correct Answer :

LiBr


Explanation :
No Explanation available for this question

Which of the following metals will not reduce H2O

1.  Ca

2.  Fe

3.  Cu

4.  Li

View Answer  
4
Correct Answer :

Cu


Explanation :
No Explanation available for this question

In the Bohr hydrogen atom, the electronic transition emitting light of longest wave length is

1.  n=2 to n=3

2.  n=4 to n=3

3.  n=3 to n=2

4.  n=2 to n=1

View Answer  
4
Correct Answer :

n=4 to n=3


Explanation :
No Explanation available for this question
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