(a) What is rate of reaction? Write two factors that affect the rate of reaction. (b) The rate constant of a first orde

# Ask a Question

### Question Asked by a Student from EXXAMM.com Team

Q 2650591414.     (a) What is rate of reaction? Write two factors that affect the rate of reaction.
(b) The rate constant of a first order reaction increases from 4 × 10^-2 to 8 × 10^-2
when the temperature changes from 27°C to 37°C. Calculate the energy of activation (Ea).
(log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)

text( OR )

(a) For a reaction A + B ⟶ P, the rate is given by
Rate = k [A] [B]^2
(i) How is the rate of reaction affected if the concentration of B is doubled?
(ii) What is the overall order of reaction if A is present in large excess?

(b) A first order reaction takes 23.1 minutes for 50% completion. Calculate the time required for 75% completion of this reaction.
(log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)
CBSE-12th 2015

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

#### Access free resources including

• 100% free video lectures with detailed notes and examples
• Previous Year Papers
• Mock Tests
• Practices question categorized in topics and 4 levels with detailed solutions
• Syllabus & Pattern Analysis