Kinetics

Impact is a collision characterized by...

• the exchange of a large force during a large time interval.

• the exchange of a small force during a small time interval.

• the exchange of a large force during a small time interval.

• the exchange of a small force during a large time interval.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

Which of the description below descript a perfectly plastic impact?

• in which the velocity of the system is conserved; (e = 1)

• in which there is a total loss of system velocity ; (e = 0)

Tags

NGSS.HS-PS2-2

What will be the fraction of molecules having energy equal to or greater than activation energy, Ea?

• K

• A

• Ae-Ea/Rt

• e-Ea/Rt

Tags

NGSS.HS-PS1-4

Which among the following is a false statement?

• Rate of zero order reaction is independent of initial concentration of reactant.

• Half life of a third order reaction is inversely proportional to square of initial concentration of the reactant.

• Molecularity of a reaction may be zero or fraction.

• For a first order reaction, t1/2=0.693K

Tags

NGSS.HS-PS1-5

The half life of the first order reaction having rate constant K = 1.7 x 10-5s-1 is

• 12.1 h

• 9.7 h

• 11.3 h

• 1.8 h

when the rate of the reaction is equal to the rate constant, the order of the reaction is

• zero order

• first order

• second order

• third order

Tags

NGSS.HS-PS1-5

If the rate of a reaction is expressed by, rate = A [A]² [B], the order of reaction will be

• 2

• 3

• 1

• 0

Tags

NGSS.HS-PS1-5

The number of molecules of the reactants taking part in a single step of the reaction is indicative of

• order of a reaction

• molecularity of a reaction

• fast step of the mechanism of a reaction

• half-life of the reaction

The overall rate of a reaction is governed by

• the rate of fastest intermediate step

• the sum total of the rates of all intermediate steps

• the average of the rates of all the intermediate steps

• the rate of slowest intermediate step

Tags

NGSS.HS-PS1-5

What type of reaction is this?

• Second order

• Unimolecular

• Pseudo-unimolecular

• Third order

Tags

NGSS.HS-PS1-5