Chemistry Chemical Equilibrium Mcqs Online Test 5

Chemistry Chemical Equilibrium Mcqs Online Test 5 Preparation Question Answer

Which of the following will not change the concentration of ammonia at the equilibrium ?


Increase of pressure
Increase of volume
Addition of catalyst
Decrease of temperature

Correct!

Wrong!

In which of the following equilibria will Kc and Kp have the same value?


PCI5 = PCI3 + Cl2
N2 + 3H2 = 2NH
2CO + O2 = CO2
N2 + O2 = 2NO

Correct!

Wrong!

Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH?


0
1
2
any one

Correct!

Wrong!

The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is? 


3
2.7
. 2
1.5

Correct!

Wrong!

Kc value has?


No units
Units
Both a & b
None

Correct!

Wrong!

AgCl dissolved with conc (2x10-2) Ksp will be?


3.6 x 10-6
3.6 x 10-5
7.2 x 10-6
4 x 10-4

Correct!

Wrong!

For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp?


Kc is generally greaer than Kp
Kc is equal to Kp if the total moles of reactants and products are equal
Kc is generally less than Kp
Kc is generally equal to Kp

Correct!

Wrong!

Which of following is not a base? 


KOH
NH3
PH3
BF3

Correct!

Wrong!

  pH of an aqueous solution is 5.5. The hydroxyl ion conc. In the solution would be ?


5.5
?8.5
10-8.5
10

Correct!

Wrong!

If a buffer solution of higher pH than seven is to be made we use?


Strong acid and strong base
Weak acid and strong base
Weak acid and strong base
Weak acid and its salt with strong base

Correct!

Wrong!

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