CBSE 12 Chemistry (CBSE Class 12 Chemistry — Objective Practice) — Free Online Mock Test

CBSE 12 Chemistry exam at a glance

50 full-length mock tests

Attempt 50 full-length mocks

Each is a distinct question set built on the real 35-question, 50-minute pattern, with instant scoring and section-wise analysis. The first is free; unlock all 50 forever for $1.99 (one-time, no subscription).

CBSE 12 Chemistry section breakdown

The CBSE 12 Chemistry mock test on Wrexa Edge replicates the real exam's section structure — same names, same question count per section, same time limits. No inter-section breaks — the timer runs continuously.

• Class 12 Chemistry — Objective (35 Q)
  35 questions · 50 minutes · ~86 sec/question

Marking scheme

+1 per correct. Try your score.

Strategy: CBSE 12 Chemistry has no negative marking. Attempt every question — blank answers cost you potential marks but cannot pull your score down.

Scale: CBSE 12 Chemistry (out of 35).

How CBSE 12 Chemistry is conducted

• Mode
  Standard — practice without proctoring on Wrexa Edge, or enable optional webcam proctoring to simulate test-day conditions.
• Test format
  Linear / fixed-form — every candidate sees the same number of questions per section.
• Backtracking
  Allowed — you can revisit and change answers within a section.
• Mark for review
  Available — flag tough questions and return to them before submitting the section.

Tools available during the CBSE 12 Chemistry exam

• Calculator
  On-screen scientific calculator (matches the real exam interface).

Wrexa Edge renders these tools inside the mock test exactly as they appear on the real CBSE 12 Chemistry exam — same shortcuts, same behaviour.

CBSE 12 Chemistry time strategy

With 35 questions in 50 minutes, you have about 86 seconds per question on average. Successful candidates aim for the following pacing on each section:

• Class 12 Chemistry — Objective (35 Q)
  Target ~86 sec/question. If a question takes more than 129 seconds, mark for review and move on.

Wrexa Edge's analytics show your actual time-per-question after every mock so you can spot which sections you're losing time on.

CBSE 12 Chemistry topics covered

Across the 50 Wrexa Edge variants of CBSE 12 Chemistry, the following topics appear most often (sample distribution from one variant):

Class 12 Chemistry — Objective (35 Q)

• Chemistry — Chemical Kinetics · 6
• Chemistry — d- and f-Block · 6
• Chemistry — Coordination Compounds · 6
• Chemistry — Haloalkanes & Haloarenes · 5
• Chemistry — Alcohols, Phenols & Ethers · 5
• Chemistry — Electrochemistry · 4
• Chemistry — Aldehydes, Ketones & Acids · 3

CBSE 12 Chemistry difficulty calibration

Advanced tier. Advanced-level: high-stakes exam with rigorous content depth. Expect 4-8 months of structured prep.

CBSE Class 12 Chemistry objective MCQ practice across the current NCERT syllabus (solutions, electrochemistry, kinetics, coordination compounds, organic chemistry, biomolecules). 35 MCQ. · Official language: English & Hindi.

Verified content — Wrexa Edge's CBSE 12 Chemistry bank has been deeply curated with real exam-aligned content (estimated 100% syllabus coverage).

How Wrexa Edge prepares you for CBSE 12 Chemistry

• Real test-day interface
  Our sat skin mirrors the actual CBSE 12 Chemistry testing software — same timer, palette, tools, and navigation.
• 50 distinct variants
  1750 unique practice questions, each variant a fresh test — not just shuffled options.
• Detailed analytics
  Scaled score, section accuracy, topic-wise heatmap, time-per-question — see where to focus after every attempt.
• Spaced repetition (Notebook)
  Wrong answers and flagged questions flow into an SM-2 spaced-repetition deck so you actually retain what you learn.
• Optional proctoring
  Browser-based face-api detection (no install) — turn it on to simulate a high-stakes environment.
• Free to start
  No credit card. Sign up, pick a variant, and your first CBSE 12 Chemistry mock starts in under a minute.

CBSE 12 Chemistry study plan

A phase-by-phase roadmap from your first concept to test-ready. Stretch or compress each phase to fit the time you have before your attempt.

Where CBSE 12 Chemistry can take you

A strong CBSE 12 Chemistry result opens up these careers and higher-study paths:

• College & university admission
  A strong score strengthens applications to top undergraduate programmes and competitive entrance exams.
• Scholarships & merit awards
  High performers qualify for merit scholarships, honours tracks and early-admission schemes.
• Foundation for competitive exams
  Builds the core concepts that later feed into engineering, medical, and civil-service entrance tests.

Sample CBSE 12 Chemistry practice questions

5 questions taken from the CBSE 12 Chemistry mock tests on Wrexa Edge. Try each one, then reveal the answer.

1. Class 12 Chemistry — Objective (35 Q) · Chemistry — Electrochemistry

   Q1. The Nernst equation relates electrode potential to the:

   1. Mass of the electrode
   2. Surface area of the electrode
   3. Colour of the solution
   4. Concentration of the ions
   Show answer

   Answer: D — Concentration of the ions

2. Class 12 Chemistry — Objective (35 Q) · Chemistry — Electrochemistry

   Q2. The conductivity of an electrolyte solution generally ____ on dilution.

   1. Decreases
   2. Increases
   3. Remains constant
   4. Becomes zero immediately
   Show answer

   Answer: A — Decreases

3. Class 12 Chemistry — Objective (35 Q) · Chemistry — Electrochemistry

   Q3. Faraday's first law of electrolysis states that the mass deposited is proportional to the:

   1. Voltage applied
   2. Quantity of charge passed
   3. Resistance of the cell
   4. Temperature only
   Show answer

   Answer: B — Quantity of charge passed

4. Class 12 Chemistry — Objective (35 Q) · Chemistry — Electrochemistry

   Q4. In the electrolysis of molten NaCl, sodium metal is deposited at the:

   1. Anode
   2. Salt bridge
   3. Cathode
   4. Both electrodes
   Show answer

   Answer: C — Cathode

5. Class 12 Chemistry — Objective (35 Q) · Chemistry — Chemical Kinetics

   Q5. The rate of a reaction generally ____ as the concentration of reactants increases.

   1. Decreases
   2. Remains unchanged
   3. Becomes negative
   4. Increases
   Show answer

   Answer: D — Increases

Frequently asked questions

What is the CBSE 12 Chemistry exam pattern?

CBSE Class 12 Chemistry — Objective Practice contains 35 questions across 1 section: Class 12 Chemistry — Objective (35 Q). Total duration is 50 minutes (about 86 seconds per question).

Does CBSE 12 Chemistry have negative marking?

No — CBSE 12 Chemistry has no negative marking. Each correct answer is worth 1 mark, so attempt every question.

How is CBSE 12 Chemistry scored?

Scaled score range: 0 to 35. CBSE 12 Chemistry (out of 35).

How can I practise CBSE 12 Chemistry online for free?

Wrexa Edge gives you a free full-length CBSE 12 Chemistry mock test — with instant scoring, detailed explanations and analytics — plus 49 more with a one-time $1.99 unlock that never expires. Start practising in under a minute, no card required.

What is the difficulty level of CBSE 12 Chemistry?

CBSE 12 Chemistry is rated Advanced difficulty on Wrexa Edge. Advanced-level: high-stakes exam with rigorous content depth. Expect 4-8 months of structured prep. CBSE Class 12 Chemistry objective MCQ practice across the current NCERT syllabus (solutions, electrochemistry, kinetics, coordination compounds, organic chemistry, biomolecules). 35 MCQ. · Official language: English & Hindi.

How long is the CBSE 12 Chemistry exam?

CBSE 12 Chemistry runs for 50 minutes total. On Wrexa Edge the timer is enforced exactly as on the real exam — including no inter-section breaks.

What topics are covered in CBSE 12 Chemistry?

CBSE 12 Chemistry is split into: Class 12 Chemistry — Objective (35 Q). Each section is timed and weighted separately. CBSE Class 12 Chemistry objective MCQ practice across the current NCERT syllabus (solutions, electrochemistry, kinetics, coordination compounds, organic chemistry, biomolecules). 35 MCQ. · Official language: English & Hindi.

What tools or aids are allowed during CBSE 12 Chemistry?

On-screen scientific calculator (matches the real exam interface).

Is the CBSE 12 Chemistry test adaptive?

No — CBSE 12 Chemistry is a fixed-form (linear) test. Every candidate sees the same number of questions per section.

How many CBSE 12 Chemistry mock tests does Wrexa Edge offer?

Wrexa Edge generates 50 distinct CBSE 12 Chemistry variants — each with different question content, not just shuffled options — the first one free for everyone and 49 more with a one-time $1.99 unlock. That's 1750 unique practice questions in the real test-day interface.

Is there a free CBSE 12 Chemistry test series 2026?

Yes. The Wrexa Edge CBSE 12 Chemistry test series for 2026 gives you a free full-length mock test (50 in total) plus subject-wise and topic-wise tests — instant scoring and detailed analysis, no card required.

Are CBSE 12 Chemistry previous year question–style papers included?

Every CBSE 12 Chemistry mock is modelled on the official exam pattern and the style of previous years' papers — the same 35-question structure, sections and marking — so your practice mirrors the real paper you'll sit.

Which is the best free CBSE 12 Chemistry mock test online?

Wrexa Edge's CBSE 12 Chemistry mock test replicates the real exam interface, timing and marking scheme, with instant score, section-wise analysis and 50 fresh variants — a strong free choice for 2026 preparation.

Can I take the CBSE 12 Chemistry mock test on mobile?

Yes. CBSE 12 Chemistry mock tests run in any browser on mobile, tablet or desktop — no app or download needed. Start on your phone and your progress and analytics sync when you sign in.

What is the CBSE 12 Chemistry syllabus?

The CBSE 12 Chemistry syllabus maps to its 1 section: Class 12 Chemistry — Objective (35 Q). Wrexa Edge's mock tests cover the complete syllabus topic by topic — see the topics-covered breakdown above — so you practise every area at real exam difficulty.

What is the eligibility for CBSE 12 Chemistry?

Eligibility for CBSE 12 Chemistry — age, qualification and number of attempts — is set by the official conducting body and can change each cycle, so always confirm the current official notification before applying. Wrexa Edge focuses on realistic CBSE 12 Chemistry practice: a free full-length mock in the exact exam pattern, ready whenever you are.

When is the CBSE 12 Chemistry exam and how should I prepare?

Official CBSE 12 Chemistry exam dates are announced by the conducting body for each cycle — check the latest notification for the current schedule. To be ready, follow a phased study plan and take full-length timed mocks; Wrexa Edge gives you a free CBSE 12 Chemistry mock with instant scoring so you can track your readiness week by week.

Related exams & practice tests

Candidates preparing for CBSE 12 Chemistry also practise these on Wrexa Edge:

Browse more: All School & Pre-University exams →  ·  All India exams →  ·  Full exam catalog →

• Exam calendar 2026

Ready to ace CBSE 12 Chemistry?

Join thousands of candidates practising on Wrexa Edge. Free signup, 50 variants per exam, instant scoring.