CUET Level - II NEET Mock test - 8 ( Chemistry)

If the rate of the reaction is equal to the rate constant that order of the reaction is

• 0

• 1

• 2

• 3

Tags

Chemical kinetics

Which of the following is correct?

• t_3/4/t_1/2=3 ( first order)

• t_7/8/t_1/2=3( second order)

• t_7/8/t_1/2=7/4 ( zero order reaction)

• t_15/16/t_{1/2= 15} ( first order reaction)

Tags

Chemical kinetics

Consider the reaction

If d[N₂O₄]/dt= k and d[NO₂]/dt= K', then

• 2k'=k

• K'=2k

• K'=k

• K=1/2k'

Tags

Chemical kinetics

The t 0.5 for first order reaction is 10 minutes if the initial moles of reactants are to then calculate the number of moles after 40 minutes

• 1/4

• 0

• 1/2

• 1/8

Tags

Chemical kinetics

A certain zero order reaction has K is equal to 0.024 ms-1 for the disappearance of a what will be the concentration of a after 15 seconds if the initial concentration is 0.5 0M?

• 0.50 M

• 0.375M

• 0.14M

• 0.060M

Tags

Chemical kinetics

In a first order reaction A gives B if K is rate constant and initial concentration of the reactant a is 0.5 M then the half life is

• 0.0693/k

• 0.693/0.5k

• log2/k

• log2/k√0.5

Tags

Chemical kinetics

The rate constant of a reaction is expressed case equal to a Ae^-40000/T the energy of activation is

• 40 kcal

• 40000kcal

• 80k cal

• 80000k cal

Tags

Chemical kinetics

In a zero order Reaction for every 10 degree Celsius rise and temperature the rate is doubled if the temperature rises from 30 degree Celsius to 80 degree Celsius at the rate of reaction will be

• 8 times

• 32 times

• 64 times

• 256 Times

Tags

Chemical kinetics

Which of the following is true for first order reaction?

• [A]=[A]_o-k.t

• t_3/4=2xt_1/2

• Unit of rate constant is more litre second -1

• t_1/2 directly proportional to a

Tags

Chemical kinetics

The half life of radioactive element is 20 minutes the time interval between the stages of its 33% and 67 % decay is

• 40 minutes

• 20 minutes

• 30 minutes

• 25 minutes

Tags

Chemical kinetics