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Chemistry Chapters

10th Class Chapter 1 Chemistry Short Questions

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Question: 1
What do you mean by equilibrium constant?
Answer: 1
1-31
Ratio of the product of concentration of product raised to the power of the coefficient to the product of concentration of reactants raised to the power of co-efficient in a balance chemical equation.
Question: 2
What is static equilibrium, explain with example.
Answer: 2
2-31
When reaction ceases to proceed it is called static equilibrium. Example: A building remains standing rather than falling down because all of forces acting upon it are balanced.
Question: 3
What is law of mass action?
Answer: 3
3-31
The rate at which a substance react is directly proportional to active mass and the rate of reaction is directly proportional to the product of the active masses of the reacting substance.
Question: 4
If a reaction has large value of Kcwill it go to completion and why ?
Answer: 4
4-31
The large values of Kcindicate that at equilibrium state reaction mixture consists of almost all product and reactants are negligible . It also shows that reaction has almost gone to completion reaction
Question: 5
Write down the component of atmosphere and its % age?
Answer: 5
5-31
The two major components of atmosphere are nitrogen and oxygen gases constitute 99% of the atmosphere.
Question: 6
Give the characteristics of reversible reaction
Answer: 6
6-31
The reactions in which products recombine to product the reactants are called reversible reactions
Question: 7
Which types of reactions do not go to completion ?
Answer: 7
7-31
Reversible reaction never go to completion . Because in it products recombine to form the reactants
Question: 8
Write down the use of Nitrogen.
Answer: 8
8-31
These gases ae being used to manufacture chemicals since the advent of 20th century.
Question: 9
What is law of mass action ?
Answer: 9
9-31
The rate at which a substance react is directly proportional to active mass and the rate of reaction is directly proportional to the product of the active mass of of the reacting substance
Question: 10
What are irreversible reaction?
Answer: 10
10-31
The reactions in which the product do not recombine to form the reactants.
Question: 11
What are the characteristics of a reaction that established equilibrium state at once?
Answer: 11
11-31
If a reaction has very small value of Kcwill attain the equilibrium state at once
Question: 12
why reversible reactions never complete?
Answer: 12
12-31
As reversible reactions are those in which reactants combine to form product and product recombine to form the reactants that is why they never complete.
Question: 13
How dynamic equilibrium is established ?
Answer: 13
13-31
When the forward reaction become equal to the reverse reaction then equilibrium state is established
Question: 14
How the active mass is represented ?
Answer: 14
14-31
Active mass is represented by square brackets { }
Question: 15
Define chemical equilibrium state.
Answer: 15
15-31
When The rate of forward reaction take place at the rate of reverse reaction, the composition of the reaction mixture remains constant, it is called chemical equilibrium.
Question: 16
Why the reversible reactions do not go to completion ?
Answer: 16
16-31
It is because in reversible reactions products re-combine to form the reactants in a same rate as the reactants from the product
Question: 17
Write down the use of oxygen?
Answer: 17
17-31
Oxygen is used to prepare sulphur dioxide which is further used to manufacture king of chemicals sulphuric acid.
Question: 18
Write down the component of atmosphere and its percentage
Answer: 18
18-31
The two major components of atmosphere are nitrogen and oxygen gases constitute 99% of the atmosphere
Question: 19
What is direction of reversible reaction?
Answer: 19
19-31
These reactions proceed in both direction. Forward direction Reverse direction.
Question: 20
Write down the use of oxygen .
Answer: 20
20-31
Oxygen is used to prepare sulphur dioxide which is further used to manufacture king of chemicals sulphuric acid
Question: 21
What is meant by extent of reaction ?
Answer: 21
21-31
It indicates how much reactants are converted into products and how far a reaction proceeds before reactant form the products
Question: 22
What us state equilibrium .explain with example
Answer: 22
22-31
When reactions ceases to proceed it is called static equilibrium
Question: 23
How the active mass is represented.
Answer: 23
23-31
Active mass is represented by square brackets [ ]
Question: 24
How dynamic equilibrium is established?
Answer: 24
24-31
When the forward reaction become equal to the reverse reaction then equilibrium state is established Rate of forward reaction = Rate of Reverse reactions.
Question: 25
Write down the uses of nitrogen .
Answer: 25
25-31
These gases are being used to manufacture chemicals since the advent of 20th century
Question: 26
Why reversible reaction never complete ?
Answer: 26
26-31
As reversible reactions are those in which reactions combine to form product and product recombine to form the reactants that us why they never complete

Question: 27
How direction of a reaction can be predicted ?
Answer: 27
27-31
The direction of a reaction can be predicted by inserting the concentration of the reactants and products at the particular moment in the equilibrium expression
Question: 28
Why amount if reactants and products do not change in reversible reaction ?
Answer: 28
28-31
In dynamic equilibrium rate of forward reaction is always equal to rate of reverse reaction as in reversible reaction by dynamic equilibrium condition is appear that is why the amount will not change
Question: 29
Why at equilibrium state reaction does not stop ?
Answer: 29
29-31
It is because the forward reaction take place at the same reaction as of reverse but in opposite direction . So reactants convert into product and products into reactants
Question: 30
Define chemical equilibrium state
Answer: 30
30-31
When the rate of forward reaction take place at the rate of reverse reactions , the composition of the reaction mixture remain constant , it is called chemical equilibrium
Question: 31
How can you know that a reaction has achieved an equilibrium state ?
Answer: 31
31-31
By knowing the value of Kcwe can predict the equilibrium state . If the value of Qcis equal to Kcthen indicate that a reaction has achieved an equilibrium state

9th Class Chemistry Chapters Short Questions