The effective atomic number of Cr in [Cr(NH3)6]Cl3 is

1.  35

2.  36

3.  27

4.  33

View Answer  
4
Correct Answer :

33


Explanation :
No Explanation available for this question

An organic compound having carbon and hydrogen has 80% carbon. The empherical formula of the Hydrocarbon is

1.  CH

2.  CH2

3.  CH3

4.  CH4

View Answer  
4
Correct Answer :

CH<sub>3</sub>


Explanation :
No Explanation available for this question

The first emission line of the hydrogen atomic spectrum in the Balmer series appears at (R=Rydberg constant)

1.  (5R/36)cm-1

2.  (3R/4)cm-1

3.  (7R/36)cm-1

4.  (9R/400)cm-1

View Answer  
4
Correct Answer :

(5R/36)cm<sup>-1</sup>


Explanation :
No Explanation available for this question

4.5 moles each of hydrogen and iodine heated in sealed 10L vessel.At equilibrium 3 moles of HI were found. The equilibrium constant for

1.  1

2.  10

3.  5

4.  0.33

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

75% of first order reaction is completed in 32 minutes 50% of the reaction would have been completed in

1.  24 min

2.  16 min

3.  18 min

4.  24 min

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4
Correct Answer :

16 min


Explanation :
No Explanation available for this question

Which of the following solutions cannot act as a buffer

1.  NaH2PO4 + H3PO4

2.  CH3COOH + CH3COONa

3.  HCl + NH4Cl

4.  H3PO4 + Na2HPO4

View Answer  
4
Correct Answer :

HCl + NH<sub>4</sub>Cl


Explanation :
No Explanation available for this question

The heat of combustion of CH4,C(graphite) and H2(g) are respectively 2 kcal,40 kcal and -10 kcal.The heat of formation of CH4

1.  40 kcal

2.  +40 kcal

3.  80 kcal

4.  none of these

View Answer  
4
Correct Answer :

80 kcal


Explanation :
No Explanation available for this question

A gas decolourises Br2 in CCl4 and forms a precipitate with ammonaical silver nitrate.The gas is

1.  C2H2

2.  C2H4

3.  C2H6

4.  CH4

View Answer  
4
Correct Answer :

C<sub>2</sub>H<sub>2</sub>


Explanation :
No Explanation available for this question

Mortar is a mixture of

1.  Plaster of paris +silica

2.  slaked lime + plaster of paris + H2O

3.  CaCO3+silica + H2O

4.  cement+silica + H2O

View Answer  
4
Correct Answer :

slaked lime + plaster of paris + H<sub>2</sub>O


Explanation :
No Explanation available for this question

Which one of the following reactions reacts with concentrated sulphuric acid

1.  Au

2.  Ag

3.  Pt

4.  Pb

View Answer  
4
Correct Answer :

Ag


Explanation :
No Explanation available for this question
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