Copper displaces which of the following metal from its salt solution

1.  FeSO4

2.  ZnSO4

3.  AgNO3

4.  All the above

View Answer  
4
Correct Answer :

AgNO3


Explanation :
No Explanation available for this question

In the cell reaction :Cu(s)+2Ag+(aq) →Cu2+(aq) +2Ag(s):E0cell=0.46V,By doubling the concentration of Cu2+,Ecell is

1.  Doubled

2.  Unchanged

3.  Halved

4.  Increases but less than doubled

5.  Decreases by small fraction

View Answer  
5
Correct Answer :

Decreases by small fraction


Explanation :
No Explanation available for this question

The standard reduction potential values of three metallic cations X, Y and Z are 0.52, -3.03 and -1.18 V respectively. The order of reducing power of corresponding metals is

1.  Y > Z > X

2.  X > Y > Z

3.  Z > Y > X

4.  Z > X > Y

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4
Correct Answer :

Y > Z > X


Explanation :
No Explanation available for this question

The molar conductance of a 0.1M solution of an electrolyte was found to be 400ohm-1 cm2mol-1. The cell constant of the cell is 0.1Cm-1. The resistance of the solution is

1.  25 ohm

2.  2000 ohm

3.  200 ohm

4.  400 ohm

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4
Correct Answer :

25 ohm


Explanation :
No Explanation available for this question

Standard reduction potentials of some electrodes are: Cd |Cd2+=-0.40V,Ni|Ni2+=-0.25V,Cu |Cu2+=+0.34V,Ag|Ag2+=+0.80V,the copper sulphate can be stored in a container made of

1.  Ni

2.  Cd

3.  Ag

4.  None of these

View Answer  
4
Correct Answer :

Ag


Explanation :
No Explanation available for this question

Diazonium salt decomposes as: C6H5N2++Cl-→C6H5Cl+N2 At 00C,the evolution of N2 become two times faster when initial concentration of the salt is doubled. Thus, it is

1.  A first order reaction

2.  A second order reaction

3.  Independent of the initial concentration of reactant

4.  A zero order reaction

View Answer  
4
Correct Answer :

A first order reaction


Explanation :
No Explanation available for this question

The activation energy of a reaction is 56.2kJ/mole. The ratio of rate constants at 305K and 300Kis (R=8Jmol-1K-1) about:

1.  1.25

2.  1.47

3.  1.10

4.  1.60

View Answer  
4
Correct Answer :

1.47


Explanation :
No Explanation available for this question

Effect of temperature on reaction rate is given by

1.  Claisen - Clapeyron equation

2.  Arrhenius equation

3.  Gibbs - Helmholtz equation

4.  Kirchoff equation

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4
Correct Answer :

Arrhenius equation


Explanation :
No Explanation available for this question

In the following reaction, how is the rate of appearance of underlined product related to the rate of disappearance of the underlined reactant

1.  (d[Br2]/dt)=-(d[Br-]dt)

2.  (d[Br2]/dt)=+(3/5)(d[Br-]dt)

3.  (d[Br2]/dt)=-(3/5)(d[Br-]dt)

4.  (d[Br2]/dt)=-(5/3)(d[Br-]dt)

View Answer  
4
Correct Answer :

(d[Br2]/dt)=-(3/5)(d[Br-]dt)


Explanation :
No Explanation available for this question

1.  P+Q→R

2.  P→Q+R

3.  P→Q→R

4.  P→R→Q

View Answer  
4
Correct Answer :

P→Q→R


Explanation :
No Explanation available for this question
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