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10th Class Chemistry Chapter No.1 Chemical Equilibrium MCQs

MCQ Chemistry Class 10th Chapter No.1 Chemical Equilibrium




CHEMISTRY – Class 10th
Chapter Name : Chemical Equilibrium
Chapter No. 1
Multiple Choice Questions from Text Book
Note : All MCQ’s selected in this test are from OLD Matric board Papers and Text Book.




Book Name :  CHEMISTRY
Chapter No.  1
Chapter Name : Chemical Equilibrium
Total MCQ from Text Book :  68
Book Version  :
2023

Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Matric Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade  : 10th ( Matric)
Total Marks : 68
Total Time :   68 minutes 




محترم اساتذہ کرام و  پیارے طلبا و طالبات
ہم نے یہ ویب سائٹ آپ کے فائدے اور امتحانی تیاری کو مدنظر رکھ کر بنائی ہے۔ اگر آپ کو اس سے کوئی فائدہ ہوتا ہے اور آپ کو یہ ایم سی کیوز امتحان کی تیاری کے لئے سود مند ہیں ۔ تو آپ اپنے  کم سے کم دس دوستوں کو اس کا لنک ضرور  شئیر کریں۔تاکہ اس سے آپ کے  بہت سارے دوسرے دوستوں کا فائدہ ہوسکے۔



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40

Chemistry Class 10th Chapter No 1 Chemical Equilibrium

1 / 68

Plants consume carbon dioxide and release in atmosphere:

2 / 68

THe Characteristics of reversible reactions are the following except.......

3 / 68

At dynamic equilibrium:-

4 / 68

For the reaction:  aA + bB  ⇌   cC + dD Expression for forward reaction according to law of mass action is:

5 / 68

The lives of aquatic plants and animals depend on the oxygen which is:

6 / 68

A reverse reaction is one that:

7 / 68

The reactions do not stop and take place on both directions at equal rate and attain the equilibrium state is called:

8 / 68

Law of mass action is given by:

9 / 68

The product of following reaction is:            2H2 + O2   →    ?

10 / 68

The reaction in which products do not recombine to form reactants are called:

11 / 68

For a reaction PC13 + Cl    ⇌     PC15   , Equilibrium constant expression is:

12 / 68

The correct representation of reversible reaction between 112 and 12 is:

13 / 68

If numerical value of Kc is neither small nor large then:

14 / 68

The characteristic of irreversible reaction:

15 / 68

For reaction H2 + I2 ⇌ 2HI3 the unit of Kc:  

16 / 68

For the reaction: N2 + 3H2 ⇌ 2NH3   the expression for rate constant is

17 / 68

The percentage of nitrogen in atmosphere is:

18 / 68

Kc is equilibrium constant where:

19 / 68

The gas we exhale during respiration is:

20 / 68

CaCO3 →  CaO +  ?  

 During given reaction the gas evoked is:

21 / 68

Macroscopic characteristic of forward reaction is:

22 / 68

For the reaction:    N2O4        ⇌    2N2 value of Kc is:

23 / 68

For the reaction:   N2(g) + O2(g)   ⇌  2NO(g)  the expression for equilibrium constant is:

24 / 68

Which one is not macroscopic characteristic of dynamic equilibrium:

25 / 68

For the reaction between N2 and H2to form NH3 the unit of Kc is: 

26 / 68

The reaction in which all the reactants arc converted into products:

27 / 68

If the numerical value of Qc (reaction quotient) is less than Kc then;

28 / 68

If Qc < Kc the:

29 / 68

Oxidation of carbon monoxide goes to completion at:

30 / 68

For a reaction between PCI3 and Cl2 to form PCI5, the units of K, are:

31 / 68

Balance equation for the reaction of nitrogen with hydrogen is:

32 / 68

Which one of the following statement is not correct about active mass?

33 / 68

Reactions which have comparable amounts of reactants and products at equilibrium state have:

34 / 68

 At dynamic equilibrium state:

35 / 68

In the lime kiln, the reaction:
CaCo3(s) -----------> CaO(s) + CO2(g)     goes to completion because.

36 / 68

Macroscopic characteristic of backward reaction is:

37 / 68

Specific rate constant for backward reaction is:

38 / 68

The reaction will attain the equilibrium if:

39 / 68

When the magnitude of Kc is very large it indicates:

40 / 68

When the magnitude of K, is very small it indicates:

41 / 68

The value of Kc depends only on:

42 / 68

At chemical equilibrium state:

43 / 68

Unit of Kc for reaction N2 + 3H2 ⇌ 2NH is:

44 / 68

At equilibrium state when reaction ceases to proceed, it is called:

45 / 68

 The characteristic of reversible reaction is :

46 / 68

In an irreversible reaction dynamic equilibrium:

47 / 68

When the magnitude of Kc is very large it indicates:

48 / 68

Describe the relationship between active masses of the reactants and rate of reaction.

49 / 68

The Product of the reaction CaO + CO2  →  ?

50 / 68

Dynamic means:

51 / 68

For the reaction:  aA + bB  ⇌   cC + dD  Expression for rate of reverse reaction is...

52 / 68

The rate at which a substance reacts is directly proportional to its active mass and the rate of reaction is directly proportional to the product of active masses of the reacting substances is called:

53 / 68

When the magnitude of Kc is very small it indicates:

54 / 68

Specific rate constant for forward reaction is represented as:

55 / 68

The major components of atmosphere is:

56 / 68

For [H2] =0.05 mol dm-3    [I2] = 0.06 mol din-3 and (HI) = 0.49 mol dm-3 the Value of Kc is:

57 / 68

The gas we inhale during breathing is:

58 / 68

The substances that combine in a chemical reaction are called:

59 / 68

Reaction goes from right to left if:

60 / 68

For the reaction,   2CO + O2  ⇌    2CO2   The value of Kc is:

61 / 68

The percentage of oxygen in atmosphere is:

62 / 68

For the reaction:   aA + bB  ⇌   cC + dD  the expression for chemical equilibrium constant is:

63 / 68

Nitrogen and hydrogen were together to make ammonia:

N2 +3H2 ⇌  2NH3           Kc = 2.86 mol -2 dm 6

What will be present in the equilibrium mixture?

64 / 68

When a system is at equilibrium states:

65 / 68

The new substances that arc formed in a chemical reaction arc:

66 / 68

Molar concentration (mol dm-3) is expressed as:

67 / 68

For the reaction,    2A(g) + 13(g)  ⇌ 3C(g)     the expression for the equilibrium constant is:

68 / 68

In following reaction the colour of iodine is purple but the product is:

H2 + I2   →   2HI

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