ICSE Class 8 Chemistry Quarterly Tests Free PDF: what this page gives
ICSE Class 8 Chemistry quarterly tests are school-level assessments that check definitions, chemical formulae, balanced equations, atomic structure, matter and gas tests. This page preserves the ICSE Class 8 Chemistry Quarterly Tests Free PDF links and adds a teacher-style revision plan with worked answers.
Class 8 does not have a public CISCE board examination like Class 10. The preserved papers are useful practice resources, but the exact chapters, marks and duration can vary by school. Use the PDFs for timed practice and confirm your school’s portion with your teacher.
For official board information, refer to the CISCE website. For related study help, use the ICSE Class 8 study directory and the ICSE Class 8 syllabus page.
Download Chemistry Quarterly Tests PDF
The table keeps the existing PDF resources and exact download links. Each file opens in a new tab.
| Year | Paper type | Title | PDF link | Best use |
|---|---|---|---|---|
| 2019 | Quarterly Test | Qty Chemistry | Download | Practise balancing equations, relative molecular mass, formulae, valency and mixtures. |
| 2018 | Quarterly Test | Qty Chemistry | Download | Practise atomic structure, radicals, gas tests, reaction types and percentage composition. |
Paper pattern from preserved PDFs
The listed PDFs show school-level Class 8 Chemistry quarterly papers, not a fixed CISCE rule. Use the pattern as a practice guide.
| Feature | Observed in the PDFs | How to prepare |
|---|---|---|
| Marks | The preserved papers show 80 marks. | Prepare both short answers and longer application questions. |
| Time | The papers show 2 hours plus 15 minutes reading time. | Use reading time to choose Section B questions carefully. |
| Question types | Formulae, chemical names, balancing equations, definitions, reasons, molecular mass and gas identification. | Revise mixed topics instead of reading only one chapter. |
Key topics for ICSE Class 8 Chemistry revision
| Area | What to know | Likely task |
|---|---|---|
| Matter | Matter has mass and occupies space; particles have intermolecular space, attraction and random motion. | Define matter, explain states of matter and give reasons. |
| Formulae and radicals | Know names and formulae such as \( \mathrm{Ca(NO_3)_2} \), \( \mathrm{Al_2(SO_4)_3} \), \mathrm{FeSO_3}, \( \mathrm{Cu(OH)_2} \) and \mathrm{K_2SO_4}. | Write names, formulae and radicals. |
| Chemical equations | Balance equations by changing coefficients only. | Balance or identify reaction type. |
| Atomic structure | Atomic number, mass number, protons, neutrons, electrons, isotopes, valency and electronic configuration. | Complete tables or draw simple shell diagrams. |
| Elements, compounds and mixtures | Elements contain one kind of atom; compounds have fixed chemical composition; mixtures have variable composition. | Classify examples such as aluminium, ammonia, smoke, glucose, bread and blood. |
| Gas tests | Hydrogen gives a pop sound, carbon dioxide turns lime water milky, ammonia turns moist red litmus blue, and chlorine bleaches moist litmus. | Identify gases from observations. |
Concept snapshot: matter as a classroom crowd
Imagine particles as students. In a solid, students sit close and only move slightly. In a liquid, they can move past one another. In a gas, they spread through the whole hall. This picture explains why solids keep shape, liquids flow and gases fill the vessel.
Worked examples from Class 8 Chemistry question types
Worked Example 1: Balance \( \mathrm{Al_4C_3 + H_2O \rightarrow Al(OH)_3 + CH_4} \)
Step 1: Balance aluminium and carbon first.
\mathrm{Al_4C_3 \rightarrow 4Al(OH)_3 + 3CH_4}
Step 2: Oxygen atoms on the product side are 4 \times 3 = 12, so put 12 before \mathrm{H_2O}.
\mathrm{Al_4C_3 + 12H_2O \rightarrow 4Al(OH)_3 + 3CH_4}
Step 3: Check hydrogen: left side =12 \times 2=24; right side =12+12=24.
Final answer: \( \mathrm{Al_4C_3 + 12H_2O \rightarrow 4Al(OH)_3 + 3CH_4} \).
Worked Example 2: Relative molecular mass of \( \mathrm{(NH_4)_2SO_4} \)
Step 1: Use \mathrm{N}=14, \mathrm{H}=1, \mathrm{S}=32, \mathrm{O}=16.
Step 2: Count atoms: nitrogen =2, hydrogen =8, sulphur =1, oxygen =4.
M_r = 2(14)+8(1)+32+4(16)
M_r = 28+8+32+64=132
Final answer: Relative molecular mass =132.
Worked Example 3: Percentage of oxygen in water
Step 1: Formula of water is \mathrm{H_2O}.
M_r(\mathrm{H_2O})=2(1)+16=18
Step 2: Oxygen contributes 16 parts out of 18.
\% \text{ of oxygen}=\frac{16}{18}\times 100=88.888\ldots\%
Final answer: Oxygen in water =88.89\% approximately.
Examiner’s mindset: where marks are gained or lost
In formula and equation questions, marks are usually lost for one wrong subscript or one missed coefficient. In molecular mass questions, brackets matter: \( \mathrm{(NH_4)_2} \) means both nitrogen and hydrogen are multiplied by 2. In definition questions, include the key scientific condition; for matter, write both mass and occupied space.
Common mistakes students make in ICSE Class 8 Chemistry
- Changing subscripts: Do not change \mathrm{H_2O} while balancing; change only coefficients.
- Missing brackets: In \( \mathrm{(NH_4)_2SO_4} \), the bracketed group is multiplied by 2.
- Confusing atomic number and mass number: Atomic number is protons; mass number is protons plus neutrons.
- Writing vague gas tests: State the observation and the gas name together.
- Ignoring units: Write 0^\circ\mathrm{C}, 100^\circ\mathrm{C} and \% where needed.
Related ICSE Class 8 Chemistry resources
After solving the PDFs, revise from the ICSE Class 8 books, practise more from ICSE Class 8 Chemistry previous year papers, and move to ICSE Class 8 Chemistry half-yearly tests when more chapters are complete.
- ICSE Class 8 study materials
- ICSE Class 8 syllabus
- ICSE Class 8 books
- ICSE Class 8 Chemistry previous year papers
- ICSE Class 8 Chemistry half-yearly tests
Frequently Asked Questions
Are ICSE Class 8 Chemistry quarterly test PDFs official CISCE board papers?
No. ICSE Class 8 Chemistry quarterly test PDFs are school-level practice papers; the public CISCE board examination is held at Class 10 and Class 12.
Which chapters are most useful for ICSE Class 8 Chemistry quarterly tests?
Revise matter, formulae and radicals, chemical equations, atomic structure, valency, elements, compounds and mixtures, and common gas tests first.
How should I balance equations in Class 8 Chemistry?
Write correct formulae, count atoms, change coefficients only, and recheck every element; never change subscripts inside a formula.
Do the marks and duration stay the same in every school?
No. The preserved PDFs show an 80-mark pattern with reading time, but Class 8 quarterly tests are school-level assessments, so marks and duration can vary.
Are these PDFs useful for half-yearly Chemistry preparation?
Yes. They help you find weak areas early; after correcting them, solve wider ICSE Class 8 Chemistry papers and half-yearly tests.