Chemical Kinetics — Class 12 Chemistry NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 12 Chemistry chapter "Chemical Kinetics" — 7 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 12 Chemistry chapter "Chemical Kinetics" — 7 important questions with detailed answers for CBSE board exam…
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Key Questions Covered:
- Define rate of reaction. What factors affect the rate of chemical reaction?
- Define order of reaction. How is it determined experimentally?
- A reaction has rate law: Rate = k[A]²[B]. Calculate the order of reaction and…
- + 4 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| Define rate of reaction. What factors affect the rate of … | ✓ Solved |
| Define order of reaction. How is it determined experiment… | ✓ Solved |
| A reaction has rate law: Rate = k[A]²[B]. Calculate the o… | ✓ Solved |
Showing 3 of 7 questions
Q1: Define rate of reaction. What factors affect the rate of chemical reaction?
Rate of Reaction:
The speed at which reactants are consumed or products are formed per unit time.
Mathematical expression:
Rate = Δ[concentration] / Δt (change in concentration per unit time)
Units: mol/(L·s) or mol·L⁻¹·s⁻¹
Can be expressed for reactants or products:
For reaction: aA + bB → cC + d...
Q2: Define order of reaction. How is it determined experimentally?
Order of Reaction:
The sum of powers of concentration terms in the rate equation.
For reaction: aA + bB → products
Rate = k[A]^m[B]^n
Order of reaction = m + n
where k = rate constant, m and n are experimentally determined powers (not necessarily equal to stoichiometric coefficients a and b)
Types...
Q3: A reaction has rate law: Rate = k[A]²[B]. Calculate the order of reaction and rate constant unit.
Given: Rate = k[A]²[B]
Step 1: Determine order of reaction
Order = sum of powers of concentration terms
Order = 2 (from [A]²) + 1 (from [B]) = 3
Order of reaction = 3 (third order)
Step 2: Determine unit of rate constant k
From rate equation: Rate = k[A]²[B]
k = Rate / ([A]²[B])
Substitute units:...
Showing 3 of 7 questions. Visit the full page for complete solutions.