Collision theory - class-XII
Description: collision theory | |
Number of Questions: 28 | |
Created by: Girish Goud | |
Tags: chemical kinetics chemical reactions and equations chemistry how far? how fast? electrochemistry and chemical kinetics |
Two identical balls A & B having velocity of 0.5 m/s & -0.3 m/s respectively. colloid elastically in 1-0. The velocity of A & B after collision will be?
On increasing the temperature by $10^{0}$C:
What happen with the rate of the reaction when the frequency and the number of effective collisions between reacting particles increases?
What causes an increase in effective collisions without increasing average energy?
Collision diameter is least in case of:
Collision frequency of a gas at $1\ atm$ pressure is $Z$. Its value at $0.5\ atm$ will be:
If X is the total number of collisions which a gas molecule registers with other molecules per unit time under particular conditions, then the collision frequency of the gas containing N molecules per unit volume is?
The number of collisions of Ar atoms with the walls of container per unit time?
In a closed flask of $5$l $1.0$g $H _2$ is heated from $300$ to $600$K. Which statement is not correct?
One mole of helium and one mole of neon are taken in a vessel. Which of the following statements are correct?
When the temperature of an ideal gas is increased at constant pressure?
An increase in the rate of a reaction for a rise in temperature is due to:
Effective collisions are those in which molecules must:
The rate of a chemical reaction generally increases rapidly even for small temperature increase because of a rapid increase in:
A chemical reaction occurs as a result of collisions between reacting molecules. Therefore, the reaction rate is given by:
Unit of frequency factor (A) is:
How an increase in concentration is related to number of collisions?
Assertion: Reactions happen faster at higher temperatures.
Reason: As temperatures increase, there is also an increase in the number of collisions with the required activation energy for a reaction to occur.
Two molecules collide and a reaction not occur. Which of the following is not a valid explanation for this?
What are effective collisions?
The fraction of collisions that posses the energy $E _a$ is given by:
For a chemical reaction to occur, all of the following must happen except.
According to the collision theory, most molecular collisions do not lead to a reaction. Which of the following is(are) necessary for collisions to successfully lead to the reaction?
What does it mean when a collision is elastic?
Among the following which will decrease the rate of the reaction?
i. Using highly concentrated reactants
ii. Decreasing the temperature by $25\ K$
iii. Stirring the reactants
_________ increases effective collisions without increasing average energy.
In a reaction carried out at 400 k, $0.0001\%$ of the total number of collisions are effective. The energy of activation of the reaction is: