Solving assertion-reason questions in online tests
Assertion-reason questions give you two statements and ask how they relate to each other.
In this post you will learn a fixed method to judge them, and how to practise it with the Online Test page.
What an assertion-reason question asks
The assertion is a claim. The reason is a second claim offered as the explanation of the first. You must decide two things. Is each statement true? And does the reason really explain the assertion?
Most such questions give four or five options. The wording changes from exam to exam, but the logic stays the same. The usual choices are:
- Both are true, and the reason explains the assertion.
- Both are true, but the reason does not explain the assertion.
- The assertion is true, but the reason is false.
- The assertion is false, but the reason is true.
- Both are false (printed in some papers only).
Always read the exact options printed in your question. Do not trust your memory of an older paper. A small change in the order of options can send you to the wrong answer.
The three-step method
Do the steps in this order every time. Do not jump to the options early. The options are written to tempt you into a quick guess.
- Test the assertion alone. Cover the reason with your hand. Is the assertion true or false? Write T or F on your rough sheet.
- Test the reason alone. Now ignore the assertion. Is the reason, as a standalone statement, true or false? Write T or F.
- Test the link. You need this step only when both are true. Ask yourself whether the reason tells why the assertion is true. If yes, choose the option for a correct explanation. If no, choose the option for a true but unrelated reason.
Why does this order work? The link matters only when both statements are true. If one statement is false, you already have your answer. You also save time, because you skip the hardest thinking in many questions.
A worked example from chemistry
Assertion: Ice floats on liquid water.
Reason: In ice, water molecules are held in an open hydrogen-bonded structure, so ice is less dense than liquid water.
Step 1: The assertion is true. Ice does float.
Step 2: The reason is true. The open structure of ice has more empty space than the liquid has.
Step 3: Does the reason explain the assertion? Yes. Lower density is exactly why a body floats on a liquid.
Answer: Both are true, and the reason explains the assertion.
Now replace the reason with a different true statement: water has a high boiling point compared with other compounds of similar molar mass. This is also true. But it says nothing about floating. So step 3 fails, and the answer moves to the option that says both are true but the reason is not the explanation.
Notice what happened. The truth of the two statements did not change. Only step 3 changed the option. This is why you must never stop after step 2 when both statements look correct.
How the three steps map to the options
| Assertion | Reason | Link needed? | Your option |
|---|---|---|---|
| True | True | Yes | Correct explanation, or true but not the explanation |
| True | False | No | Assertion true, reason false |
| False | True | No | Assertion false, reason true |
| False | False | No | Both false (if this option is printed) |
Keep this table in your notes. Only the first row needs extra thought about the link. If your paper does not print the last option, a false-false pair will not appear in it.
Common traps to watch for
- Absolute words. Words such as always, only and never often make a statement false. Check whether you know an exception from your textbook.
- A reason that sounds scientific. A long, technical reason is not automatically correct. Test it on its own, with the assertion covered.
- Two true facts, no connection. This is the most common trap. Both statements are correct, but one does not cause the other.
- Reversed cause. The reason may be a result of the assertion, not its cause. Ask which statement explains which.
- Half-true reasons. A reason may be true for one case but not for the general case in the assertion. Read the scope of both statements.
When you review a wrong answer, name the trap that caught you. Over a few tests you will see the same one repeating, and then you can watch for it.
Practising on the Online Test page
The Online Test page lists the question types it carries: MCQ, multi-select, numerical with tolerance, assertion–reason, match, and typed answers for subjective questions. So you can practise this skill in the same place where you practise other types.
Here is a simple way to use it:
- Open the Online Test page. Under Take a test, enter the code your teacher shared in the Test code box and press Open test. No account is needed unless the test asks for one.
- When an assertion-reason question appears, write T or F for each statement on paper before you choose an option.
- The test follows the way computer-based exams run, with a countdown, auto-submit, sections, a palette and mark for review. Use mark for review when you are stuck on step 3. Come back to it after the other questions.
- Watch the countdown. Because the test submits on its own when time ends, practise giving each pair a steady, fixed amount of time.
- After submitting, open the full review with explanations. Check not only whether your option was right, but whether your T or F for each statement matches the explanation.
The instant analysis shows score, accuracy, topic-wise and difficulty-wise bars, and time per question. Look at the time per question. If assertion-reason items take you longer than other types, you need more practice with the method, not more speed.
Under My attempts you can find the tests you have taken. Use them to compare how clearly you could state the link in an older test and in a newer one.
A routine for each practice session
Short, regular practice works better than one long session. Try this routine:
- Attempt a test with the clock running. Use the three steps on every pair.
- In the review, list every pair you got wrong.
- For each one, write a single line: which step failed, the assertion, the reason or the link?
- Revise the NCERT concept behind the failed step before your next test.
Read your list with care. If most errors are in steps 1 and 2, your concept is weak. Go back to the chapter and revise it. If most errors are in step 3, you need to practise asking why more carefully. Write the explanation in your own words, in one sentence, before you pick the option.
Key takeaways
- Judge the assertion and the reason separately before you look at the options.
- Check the link only when both statements are true.
- Two true statements do not always form a cause and effect pair.
- Use mark for review on the Online Test, and study the explanations after you submit.
- After each test, note which step failed and fix that step.
Frequently asked questions
Does the Online Test carry assertion-reason questions?
Yes. The Online Test page lists assertion–reason among its question types, along with MCQ, multi-select, numerical with tolerance, match, and typed answers for subjective questions.
Do I need an account to take a test?
Not unless the test asks for one. You enter the code your teacher shared in the Test code box and press Open test.
What happens when the timer ends?
The test has a real exam clock with a countdown and auto-submit. It submits for you when the time is over.
Can I see why an answer was right or wrong?
Yes. After the test you get a full review with explanations, along with score, accuracy and time per question.
Should I guess when I cannot decide on the link?
First settle the truth of each statement. That often removes two or three options. Then use mark for review, move on, and return to the link when you have time left.
What to do next. Try it yourself on the page below.
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