Using NCERT Exemplar Problems Effectively
NCERT Exemplar is a genuine, official companion to the NCERT textbook — not a shortcut around it, and not optional extra homework to feel virtuous about. It exists because the main textbook's own exercises are, by design, a relatively gentle first pass. Exemplar is the second, harder pass that tests whether the understanding actually holds up when the question is phrased less predictably.
Used at the wrong time, or used badly, it mostly produces frustration. Used at the right time, in the right order, it is one of the most efficient ways to find out what you do not actually know before an exam does it for you.
The rule that decides when to start it
Attempting Exemplar questions on a chapter you have not finished in the textbook is the single most common way students end up disliking it. The difficulty is intentional and it is supposed to feel harder than the textbook — that is not a sign you are behind, provided the textbook pass genuinely came first.
What Exemplar adds that the textbook does not
Exemplar books are organised into several question formats beyond the textbook's usual style — objective questions including multiple-correct-option items, short-answer and long-answer questions that go a step deeper than the textbook's own exercises, and often assertion-reason items, where you are given a statement and a reason and must judge whether each is true and whether the reason actually explains the statement. That last format is worth singling out, because it is the one students most often skip or rush.
Working through an Exemplar-style question
An illustrative question, in the Exemplar style, on the mole concept
"9.0 g of ice at 0°C is converted completely to steam at 100°C. Assuming the water behaves ideally and no mass is lost, how many moles of water are present at the end?"
Working it, closed book: the mole count depends only on the mass of water, since no mass was lost during the phase changes. Moles = mass ÷ molar mass = 9.0 g ÷ 18.0 g/mol = 0.5 mol. The phase changes described in the question (ice to water to steam) are a distraction from the actual calculation — the question is testing whether you notice that the mole count is unaffected by them, not whether you can calculate heat of fusion or vaporisation, which were never asked for.
This is exactly the Exemplar pattern: the underlying calculation is simple, but the question is phrased to include information that is irrelevant to what is actually being asked, and the skill being tested is picking out what matters.
Handling assertion-reason questions specifically
Judge the assertion and the reason as two separate true/false statements first, before deciding whether the reason explains the assertion. A very common trap is a case where both statements are individually true, but the reason does not actually explain the assertion — treating "both true" as automatically meaning "reason explains assertion" is the single biggest source of lost marks on this format. Write out, in one sentence, why the reason does or does not explain the assertion before selecting your final option; that sentence is the actual understanding being tested.
Textbook vs Exemplar — a quick comparison
| NCERT textbook | NCERT Exemplar | |
|---|---|---|
| Purpose | Build the concept and basic application | Stress-test the concept from less predictable angles |
| Typical formats | In-text and back-exercise questions, mostly straightforward | Objective, short-answer, long-answer, and assertion-reason questions |
| When to use it | First, while learning the chapter | After the textbook chapter and its exercises are solid |
| Sign you are ready to move on | You can solve textbook exercises unaided | You can explain, not just recognise, why each option is right or wrong |
What goes wrong
- Starting Exemplar before finishing the textbook chapter. The harder phrasing on top of an incomplete foundation just produces confusion, not learning.
- Reading the solution before making a real attempt. Recognising a solution is not the same skill as producing one under exam conditions.
- Skipping it because it feels too hard for board level. It is meant to feel harder — that difficulty is exactly what closes the gap between "I understood the chapter" and "I can answer anything the exam asks about it".
- Treating Exemplar success as replacing textbook revision. Boards still draw heavily from textbook-style questions; Exemplar supplements that base, it does not substitute for it.
- Not tracking recurring error types across chapters. If assertion-reason questions keep tripping you up in several chapters, that is a format-level gap worth fixing directly, not just chapter by chapter.
Verify your own numericals after the closed-book attempt, not before. Exemplar problems often bury the real calculation inside extra information — solve fully on paper first, then use a calculator only to confirm the final number.
Open the ABC Chemistry Calculator Suite →If Exemplar-level questions consistently feel out of reach even after the textbook is solid, that gap is worth structured attention. ABC Chemistry teaches Class 11–12 chemistry at its Gurugram centre and online across India, with regular tests that go beyond textbook-level difficulty — abcchemistry.in.