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JEE Advanced Chemistry Questions
Practise chemistry (science) for the Joint Entrance Examination (Advanced): 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Chemistry practice
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Q1.The periodic table is arranged in order of increasing:
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Answer: C — Atomic number
The modern periodic table orders elements by atomic number.
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Q2.What is the mass of 1 mol of ammonia (NH₃)? (Molar mass 17 g/mol)
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Answer: B — 17 g
Mass = moles × molar mass = 1 × 17 g/mol = 17 g.
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Q3.The hardest naturally occurring substance is:
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Answer: C — Diamond
Diamond, a carbon allotrope, is the hardest natural material.
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Q4.What is the mass of 0.5 mol of methane (CH₄)? (Molar mass 16 g/mol)
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Answer: A — 8 g
Mass = moles × molar mass = 0.5 × 16 g/mol = 8 g.
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Q5.The chemical name of baking soda is:
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Answer: C — Sodium bicarbonate (sodium hydrogen carbonate)
Baking soda is NaHCO₃.
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Q6.What is the pH of a solution with [H⁺] = 10⁻² mol/L?
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Answer: B — 2
pH = −log[H⁺] = −log(10⁻²) = 2.
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Q7.Rusting of iron requires:
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Answer: D — Both oxygen and water
Iron rusts in the presence of oxygen and moisture, forming hydrated iron(III) oxide.
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Q8.8 g of NaCl (molar mass 58.5) is dissolved to make 1000 mL of solution. Find the molarity.
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Answer: D — 0.137 M
Moles = 8/58.5 = 0.137; molarity = moles ÷ litres = 0.137 ÷ 1 = 0.137 M.
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Q9.Which gas is responsible for most of the greenhouse effect from human activity?
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Answer: A — Carbon dioxide
CO₂ from burning fossil fuels is the largest human-caused contributor.
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Q10.What is the mass of 1.5 mol of calcium carbonate (CaCO₃)? (Molar mass 100 g/mol)
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Answer: A — 150 g
Mass = moles × molar mass = 1.5 × 100 g/mol = 150 g.
How to approach chemistry questions
Moles = mass ÷ molar mass; molarity = moles ÷ litres. pH = −log[H⁺] and pH + pOH = 14 at 25 °C. For concepts, link each property to its position in the periodic table.
About JEE Advanced
Joint Entrance Examination (Advanced) — conducted by IITs (organising IIT rotates each year). The entrance exam for undergraduate programmes at the Indian Institutes of Technology.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
JEE Advanced practice topics
| Topic | Section | Question source |
|---|---|---|
| Algebra | Mathematics | Calculated (new numbers every set) |
| Probability & Combinatorics | Mathematics | Calculated (new numbers every set) |
| Geometry & Mensuration | Mathematics | Calculated (new numbers every set) |
| Physics | Science | Calculated + question bank |
| Chemistry | Science | Calculated + question bank |