Sct quiz

WHAT IS THE Order OF REACTION whose rate constant has the same units as the rate of reaction ?

• Zero order

• First order

• Second order

• Third order

What is the effect of temperature on the rate constant of a reaction?

• Decrease with temp

• Increase with temp

• Constant

• None of above

Calculate the half life of a first order reaction from their rate constant given 200s^-1

• 0.346 s

• 0.173 s

• 3.46 × 10^-3s

• 173 s

Rate=k [A]^1/2 [B]^3/2 what is the order of this reaction

• 1

• 4

• 0

• 2

For a reaction : A+H₂O ----- B, Rate = k [A]

What is molecularity of this reaction?

• Bimolecular

• Termolecular

• Unimolecular

• Termolecular

What is rate determining step of a reaction ?

• Fast

• Slow

• Both

• None of these

Decomposition of NH₃ on the surface of tungsten is a reaction of

• Zero order

• First order

• Second order

• Fraction order

75% of the first order reaction was completed in 32 minutes 50% of the reaction was completed in

• 24 min.

• 8 min

• 16 min.

• 4 min.

Unit of rate constant for first order reaction is

• mole L^-1 s^-1

• s^-1

• Mole L^-1

• L mol^-1 s^-1

In arrhenius plot , intercept is equal to

• -E_a/R

• ln A

• ln K

• Log a