Class 12 Chemistry Volumetric Analysis Notes and Important Questions
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Notes for Class 12 Volumetric Analysis (Chemistry) are shown above.
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Important Questions
The addition of solution of required concentration in a reaction mixture yields profitable products and saves reactants.
A solution of HCl is labelled $2\ \text{M}$. Clarify its meaning?
In which aspects molarity is different from molality?
List the significance of normality factor in preparation of standard solution?
Liquor ammonia kept at a corner of your chemistry lab is $25%$ $(w/w)$ $\text{NH}_3$ and its specific gravity is $0.91$. Find the molarity of liquor ammonia.
Deduce the normality equation, N₁V₁ = N₂V₂.
Experimental data obtained by titrating a decinormal solution of oxalic acid with potassium permanganate solution are given below.
S.N | Vol. of oxalic acid taken (ml) | Burette reading (ml) (KMnO₄) — Initial reading | Final reading |
|---|---|---|---|
1. | 10 | 0.0 | 11.5 |
2. | 10 | 0.0 | 11.0 |
3. | 10 | 0.0 | 11.0 |
Name the above titration.
Calculate the equivalent weight of KMnO4 .
Calculate the normality of KMnO4 from the above data.
Why is dil. H₂SO₄ added to the conical flask containing standard oxalic acid before titrating with KMnO₄ solution?
Identify the titrant and titrand in this titration.
Standard solution of Na₂CO₃ is used to determine the strength of H₂SO₄ during titration.
How is the completion of the reaction in this titration detected? Is the solution prepared from Na₂CO₃ primary standard? Why?
2.16 g of pure Na₂CO₃ is added to 400 mL deci-normal solution of H₂SO₄. How many grams of H₂SO₄ is further required to neutralize the resultant solution completely?
Define the term primary standard substance
Why is titration between weak acid and weak base not common?
If 10 mL of N/10 (f = 1.01) oxalic acid neutralized 10 mL of x% (w/v) NaOH solution. Find the value of x.
Which indicator is used for this titration shown in figure?
methyl orange
phenolphthalein
litmus paper
both methyl orange and phenolphthalein
Two students are performing a titration of H₂SO₄ and Na₂CO₃. Which one of the following indicator would you advise select for the titration?
methyl orange
both phenolphthalein and methyl orange
litmus paper
phenolphthalein
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Exam
Past Question Analysis
Historical exam-pattern data from past NEB question papers — not a prediction of future questions.
1
Question Items
1
Total Marks
1
Papers Appeared In
| Year | Question Items | Marks |
|---|---|---|
| 2082 | 1 | 1 |
Also appears in 6 model questions (not counted above — model sets aren't actual NEB exam history).
Volumetric Analysis introduces the quantitative determination of substances using chemical reactions. Students learn about equivalent weight, concentration units, standard solutions, normality and the law of equivalence. The chapter also covers acid-base and redox titrations along with related numerical problems.
This page covers Volumetric Analysis, chapter 1 of 22 in the Class 12 Chemistry syllabus set by the National Examination Board (NEB). 9 important questions for this chapter are available, each with a full solution.
For numerical and derivation-based chapters like this one, working through past NEB questions is usually more useful than re-reading notes alone — try solving each important question above before checking the solution, then compare your working step by step.