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BITSAT Chemistry Questions
Practise chemistry (science) for the BITS Admission Test: 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.Which bond is formed by the sharing of electrons?
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Answer: B — Covalent
Covalent bonds share electron pairs.
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Q2.58.5 g of KCl (molar mass 74.5) is dissolved to make 250 mL of solution. Find the molarity.
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Answer: C — 3.141 M
Moles = 58.5/74.5 = 0.785; molarity = moles ÷ litres = 0.785 ÷ 0.25 = 3.141 M.
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Q3.Avogadro’s number is approximately:
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Answer: A — 6.022 × 10²³
One mole contains 6.022 × 10²³ particles.
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Q4.What is the mass of 2.5 mol of water (H₂O)? (Molar mass 18 g/mol)
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Answer: B — 45 g
Mass = moles × molar mass = 2.5 × 18 g/mol = 45 g.
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Q5.Which gas is produced when zinc reacts with dilute hydrochloric acid?
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Answer: D — Hydrogen
Zn + 2HCl → ZnCl₂ + H₂.
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Q6.What is the pH of a solution with [H⁺] = 10⁻¹ mol/L?
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Answer: C — 1
pH = −log[H⁺] = −log(10⁻¹) = 1.
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Q7.The periodic table is arranged in order of increasing:
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Answer: B — Atomic number
The modern periodic table orders elements by atomic number.
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Q8.What is the mass of 0.5 mol of water (H₂O)? (Molar mass 18 g/mol)
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Answer: B — 9 g
Mass = moles × molar mass = 0.5 × 18 g/mol = 9 g.
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Q9.Which is the most electronegative element?
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Answer: B — Fluorine
Fluorine has the highest electronegativity (3.98 on the Pauling scale).
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Q10.10 g of KCl (molar mass 74.5) is dissolved to make 1000 mL of solution. Find the molarity.
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Answer: C — 0.134 M
Moles = 10/74.5 = 0.134; molarity = moles ÷ litres = 0.134 ÷ 1 = 0.134 M.
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 BITSAT
BITS Admission Test — conducted by Birla Institute of Technology and Science (BITS), Pilani. Online admission test for BITS Pilani, Goa and Hyderabad campuses.
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.
BITSAT practice topics
| Topic | Section | Question source |
|---|---|---|
| Algebra | Mathematics | Calculated (new numbers every set) |
| Physics | Science | Calculated + question bank |
| Chemistry | Science | Calculated + question bank |
| English Grammar | English | Question bank |
| Logical Reasoning | Reasoning | Calculated (new numbers every set) |