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An increase in the concentration of the reactants of a reaction leads to change in :
- a)threshold energy
- b)collision frequency
- c)activation energy
- d)heat of reaction
Correct answer is option 'B'. Can you explain this answer?
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An increase in the concentration of the reactants of a reaction leads ...
Collision frequency, as number of molecules per unit volume increases.
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An increase in the concentration of the reactants of a reaction leads ...
Increase in concentration of reactants and its effect on collision frequency
When the concentration of reactants in a chemical reaction is increased, it means that there are more particles of reactants per unit volume of the reaction mixture. This increase in concentration of reactants has the following effects:
1. Increase in collision frequency
As the concentration of reactants increases, the frequency of collisions between the reactant particles also increases. This is because the reactant particles are now closer to each other and hence collide more frequently. This increase in collision frequency leads to an increase in the rate of the reaction.
2. No effect on threshold energy
The threshold energy of a reaction is the minimum amount of energy required for a chemical reaction to occur. Increasing the concentration of reactants does not change the threshold energy of a reaction.
3. No effect on activation energy
The activation energy of a reaction is the energy required for the reactant particles to overcome the energy barrier and react. Increasing the concentration of reactants does not change the activation energy of a reaction.
4. No effect on heat of reaction
The heat of reaction is the amount of heat released or absorbed during a chemical reaction. Increasing the concentration of reactants does not change the heat of reaction of a reaction.
Therefore, the correct answer is option B, i.e., an increase in the concentration of the reactants of a reaction leads to a change in collision frequency.
When the concentration of reactants in a chemical reaction is increased, it means that there are more particles of reactants per unit volume of the reaction mixture. This increase in concentration of reactants has the following effects:
1. Increase in collision frequency
As the concentration of reactants increases, the frequency of collisions between the reactant particles also increases. This is because the reactant particles are now closer to each other and hence collide more frequently. This increase in collision frequency leads to an increase in the rate of the reaction.
2. No effect on threshold energy
The threshold energy of a reaction is the minimum amount of energy required for a chemical reaction to occur. Increasing the concentration of reactants does not change the threshold energy of a reaction.
3. No effect on activation energy
The activation energy of a reaction is the energy required for the reactant particles to overcome the energy barrier and react. Increasing the concentration of reactants does not change the activation energy of a reaction.
4. No effect on heat of reaction
The heat of reaction is the amount of heat released or absorbed during a chemical reaction. Increasing the concentration of reactants does not change the heat of reaction of a reaction.
Therefore, the correct answer is option B, i.e., an increase in the concentration of the reactants of a reaction leads to a change in collision frequency.
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Community Answer
An increase in the concentration of the reactants of a reaction leads ...
Collision frequency ∝ no. of reacting molecules or atoms
Higher the concentration of reactant molecules higher is the probability of collision and so the collision frequency.
Option B is correct.
Higher the concentration of reactant molecules higher is the probability of collision and so the collision frequency.
Option B is correct.
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An increase in the concentration of the reactants of a reaction leads to change in :a)threshold energyb)collision frequencyc)activation energyd)heat of reactionCorrect answer is option 'B'. Can you explain this answer?
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