Second Half Book Test (Chapters 7–12) — Online MCQs Test
90 multiple-choice questions and 72 fill-in-the-blank questions in the bank, served at three difficulty levels. Every attempt draws a fresh, randomly shuffled paper — and every score is ranked against everyone else who sat the same level.
Foundation
A short, untimed paper to check whether the basic concepts of the lesson are clear. Best for a first pass through a topic.
Board Level
A full-length timed paper at the standard your board exam is set to. Below 50% is a fail, exactly as in the real thing.
Entry Test
The toughest tier: a long paper, 45 seconds per question and a 65% pass mark, matching the competition of a medical or engineering entry test.
| 🟢 Foundation | 🔵 Board Level | 🔴 Entry Test | |
|---|---|---|---|
| Pass mark | 40% | 50% | 65% |
| Fails below | 40% | 50% | 65% |
| Section A — MCQs | 20 | 40 | 60 |
| Section B — Fill in the blanks | 10 | 16 | 20 |
| Total questions | 30 | 56 | 80 |
| Time limit | Untimed | 56 min | 60 min |
| A++ from | 90% | 90% | 93% |
| A+ from | 80% | 82% | 87% |
| B++ from | 70% | 74% | 81% |
| B+ from | 60% | 66% | 75% |
| C from | 50% | 58% | 70% |
| D from | 40% | 50% | 65% |
| Pass rate so far | — | 0% | — |
1. The general formula of an alkyl halide is:
A. R−OH
B. R−X
C. R−CHO
D. R−COOH
Correct answer: R−X
2. The carbon-halogen bond in an alkyl halide is:
A. Non-polar
B. Polar
C. Ionic
D. Metallic
Correct answer: Polar
3. Alkyl halides typically undergo:
A. Electrophilic addition
B. Nucleophilic substitution
C. Free radical addition
D. Aromatic substitution
Correct answer: Nucleophilic substitution
4. The SN2 mechanism proceeds through a:
A. Carbocation intermediate
B. Single-step transition state
C. Free radical
D. Carbanion
Correct answer: Single-step transition state
5. The SN1 mechanism proceeds through a:
A. Carbocation intermediate
B. Concerted step
C. Carbene
D. Radical pair
Correct answer: Carbocation intermediate
1. A compound formed by replacing a hydrogen of an alkane with a halogen atom is called an alkyl ______.
Correct answer: halide
2. The carbon atom carrying the halogen in an alkyl halide bears a partial ______ charge.
Correct answer: positive
3. A species that donates an electron pair to an electron-deficient carbon is called a ______.
Correct answer: nucleophile
4. The reaction in which a nucleophile replaces the halogen of an alkyl halide is called nucleophilic ______.
Correct answer: substitution
5. The substitution mechanism that proceeds in a single step through a transition state is called ______.
Correct answer: sn2
Also accepted: sn 2
| # | Student | Tries | Best Score | Percentage | Grade |
|---|---|---|---|---|---|
1 |
Seraj Ahmad
|
1× | 10/56 | 17.9% | F |
Second Half Book Test (Chapters 7–12) MCQs — Chemistry Class XII Online Test
This free online test covers Second Half Book Test (Chapters 7–12) from Half Book & Full Book Tests of Chemistry for Class XII. It contains 90 multiple-choice questions and a Section B of 72 fill-in-the-blank questions written lesson-wise, so you can revise one topic at a time instead of sitting a full-length paper every time you want to check yourself.
Three levels, three pass marks
The same lesson is served at three standards, and the level you pick changes the pass mark, the whole grade scale, the length of the paper and the clock:
- 🟢 Foundation — Concept building. 20 questions, untimed, fails below 40%.
- 🔵 Board Level — Exam standard. 40 questions, 40 min, fails below 50%.
- 🔴 Entry Test — MDCAT / ECAT standard. 60 questions, 45 min, fails below 65%.
Rankings are kept separate per level, so a Foundation score is never compared against an Entry Test one — the competition you see is always students who sat exactly the same standard as you.
Every attempt is a different paper
The questions are drawn at random from the lesson bank and shuffled — and so are the options inside each question — on every single attempt. That matters more than it sounds: with a fixed order, a student who retakes a test twice starts recognising answer positions instead of learning the concept. Randomisation makes the second attempt an honest measurement of what you actually know, which is why exam boards do the same thing.
You get a real result card, not just a score
The moment you submit, you get your score, your percentage, your grade on the A++ to F scale, and a question-by-question review showing what you picked and what the correct answer was. Alongside it you see how you compare: how many students took this test before you, what they averaged, the grade distribution, the leaderboard, and your position among every attempt ever recorded — plus which attempt number this was for you, so improvement is visible.
Who this is for
Class XII students revising Chemistry chapter-wise, students preparing for board exams and entry tests, and teachers who want a quick, free, zero-setup practice test to hand to a class.
Frequently Asked Questions
Are the questions in this Second Half Book Test (Chapters 7–12) test random?
Yes. Every time you open this test the 90 questions are re-shuffled, and the four options inside each question are re-shuffled too. Two attempts by the same student are never served in the same sequence, so you are forced to know the concept rather than remember that "the answer was C".
Does this Second Half Book Test (Chapters 7–12) test have fill-in-the-blank questions?
Yes. The paper is in two sections. Section A is multiple choice and Section B is 72 fill-in-the-blank questions drawn from this lesson, where you type the missing word instead of picking an option. Marking ignores capital letters, extra spaces and a full stop at the end, and common alternative spellings of the same term are accepted — so you lose a mark only for the wrong word, never for the wrong formatting. Both sections carry one mark per question and count towards the same score, percentage, grade and rank.
Is this online test really free?
Completely free. There is no fee, no subscription and no app to install. You register once with your name and e-mail — no password — and you can retake every test on CloudiSchool as many times as you like.
What are the three difficulty levels?
Every lesson is available at three standards. Foundation is a short untimed paper with a 40% pass mark, for checking that the basics are clear. Board Level is a timed paper at board-exam standard where anything below 50% is a fail. Entry Test is the hardest: a long paper, 45 seconds per question and a 65% pass mark, matching MDCAT and ECAT competition. Your score is only ever ranked against other students who sat the same level.
How is my grade calculated?
Your percentage is correct answers ÷ total questions × 100, and the grade boundaries move with the level. At Foundation, A++ starts at 90% and F is below 40%. At Board Level, A++ still starts at 90% but F is below 50%. At Entry Test, A++ needs 93% and anything below 65% is a fail. Unanswered questions count as incorrect at every level.
Can I see how other students scored?
Yes. Your result card shows how many students have already taken the test, the average and highest scores, the full grade distribution, a leaderboard of top scorers with the number of times each of them attempted, and your own rank and percentile among every attempt ever submitted.
Can I take the same test more than once?
As many times as you want, at any level. Each attempt is numbered and saved to your result history, so you can see attempt 1 versus attempt 5 and watch your percentage climb. The leaderboard ranks students by their best attempt at that level.
Which syllabus do these Chemistry Class XII MCQs follow?
The question bank is written chapter-wise and lesson-wise against the Chemistry Class XII textbook contents used by Pakistani boards, so it doubles as board-exam and entry-test preparation.