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?

The total kinetic energy of the collision must be greater than some minimum value.

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A catalyst must be present at the collision.

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The colliding particles must be properly oriented in space when they collide.

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None of the above.

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Solution

The correct options are
A The total kinetic energy of the collision must be greater than some minimum value.
C The colliding particles must be properly oriented in space when they collide.
The conditions (A) and (C) are necessary for the collisions to successfully lead to reaction .
For an effective collision, molecules must possess sufficient energy (called activation orientation) and proper orientation. The presence of catalyst is not essential for collision as reaction can occur even in absence of a catalyst.

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Similar questions

Which of the following statements is incorrect about the collision theory of chemical reaction?

(a) It considers reacting molecules or atoms to be hard spheres and ignores their structural features
(b) Number of effective collisions determines the rate of reaction
(c) Collision of atoms or molecules possessing sufficient threshold energy results into the product formation
(d) Molecules should collide with sufficient threshold energy and proper orientation for the collision to be effective

Q. A electron of the kinetic energy 10 eV collides with a hydrogen atom is 1st excited state . Assuming loss of kinetic energy in the collision to be quantized. Which of the following statement is correct ?
(a) The collision may be perfectly inelastic
(b) The collision may be inelastic

Q. a) Derive integrated rate equation for the first order reaction.
b) According to collision theory, what are the two factors that lead to effective collisions?

Collision is a physical process in which two or more objects, either particle masses or rigid bodies, experience very high force of interaction for a very small duration. It is not essential for the objects to physically touch each other for collision to occur. Irrespective of the nature of interactive force and the nature of colliding bodies, Newton's second law holds good on the system. Hence, momentum of the system before and after the collision remains conserved if no appreciable external force acts on the system during collision.

The amount of energy loss during collision, if at all, is indeed dependent on the nature of colliding objects. The energy loss is observed to be maximum when objects stick together after collision. The terminology is to define collision as 'elastic' if no energy loss takes place and to define collision as 'plastic' for maximum energy loss. The behaviour of system after collision depends on the position of colliding objects as well. A unidirectional motion of colliding objects before collision can turn into two dimensional after collision if the line joining the centre of mass of the two colliding objects is not parallel to the direction of velocity of each particle before collision. Such type of collision is referred to as oblique collision which may be either two or three dimensional.

Which of the following collision is one-dimensional?

Q. For producing effective collisions, the colliding molecules must have

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