Factors Influencing Rate of a Reaction

Q.

The __ of a chemical reaction is defined as the change in the concentration of any one of the reactants or product per unit time.

Q.

The rate of a chemical reaction is defined as a change in the concentration of reactants or products with respect to which of the following parameter?

1. Density

2. Time

3. Volume

4. Mass

Q. Which of these does not influence the rate of reaction?

1. Nature of the reactants
2. Concentration of the reactants
3. Temperature of the reactions
4. Molecularity of the reaction

Q. In which of the following case the rate of the reaction will be more?

1. Marble chip reacting with dilute HCl.
2. Marble stone reacting with dilute HCl.
3. Marble piece reacting with dilute HCl.
4. Marble powder reacting with dilute HCl.

Q.

Mention the factors which affect the rate of reaction.

Q. Which of these influence the rate of the reaction?

1. Nature of the reactants
2. Concentration of the reactants
3. Temperature of the reacting system
4. None of these

Q.

The factors which affect the rate of the reaction are

1. The concentration of reactants.

2. The nature of the reactants.

3. The surface area of the solids.

4. The pressure of the gases.

Q. Analyze the diagram below:
The rate of the reaction in a test tube B is greater than the rate of the reaction in a test tube A. Which of the following factor could probably be the main reason for this?

1. The concentration of the reactants.
2. The pressure on the reactants
3. The temperature of the reactants
4. The presence of light

Q. Which of the following reaction will be occurring at a greater speed?

1. Reactants reacting at 1 atm pressure
2. Reactants reacting at 2 atm pressure
3. Reactants reacting at 5 atm pressure
4. Reactants reacting at 10 atm pressure

Q. As temparature increases, the rate of reaction also increases.

1. False
2. True

Q.

Let us dive into the land of Westeros!

When the dragons ofDanaerysthe dragon queen burn their victims, the following reaction takes place.

2C + O₂ →2CO₂

The average rate of reaction could be expressed as?

1. 
2. 
3. 
4. All of the above

Q.

The nature of the reactant is one of the factors which affects the rate of the reaction.

1. True

2. False

Q. Sulphur pieces do not react with cold concentrated nitric acid. But sulphur powder reacts.
a) Explain the reason why the rate of chemical reaction is increased here? [1 mark]
b) Suppose you want to increase the rate of reaction again. Which way you would choose? Give reason. [1 mark]

Q.

Analyze the diagram below:

The rate of the reaction in a test tube B is greater than the rate of the reaction in a test tube A. Which of the following factor could probably be the main reason for this?

1. The concentration of the reactants.
2. The pressure on the reactants
3. The temperature of the reactants
4. The presence of light

Q. Q A gas gas reaction, A2(g) - - - - - - B(g) + 1/2C(g) Shows increase in pressure from 100 mm to 120 mm 5 minutes. The rate of disappearance of A2 is.

Q. As pressure increases, the rate of reaction decreases.

1. True
2. False

Q. Assertion:- Rusting of iron is faster in the coastal region as compared to the arid region.
Reason:- Moisture content in coastal area is more than the arid region.

1. Assertion:- True

   Reason:- True

   Reason is the correct explanation of assertion

2. Assertion:- True

   Reason:- False

   Reason is not the correct explanation of assertion

3. Assertion:- False
   
   Reason:- False
4. Assertion:- False
   
   Reason:- True

Q.

When firewoods are cut into small pieces then the rate of the reaction increases. Which of the following factor is mainly responsible for it?

1. An increase in concentration
2. A decrease in concentration
3. An increase in surface area
4. A decrease in the surface area

Q.

How does a rate of reaction change if we use the powdered form of reactants in place of pellets of reactants?

1. The rate of the reaction first decreases then increases.

2. The rate of the reaction decreases.

3. The rate of the reaction increases.

4. The rate of the reaction remains the same.

Q. Write down the factors which affect the rate of reaction.