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BITSAT Mock Test
A timed 25-question mock for the BITS Admission Test covering algebra, physics, chemistry, english grammar, logical reasoning. Answer, submit and review every question with its explanation; set negative marking to match your exam’s current scheme.
BITSAT mock test
25 questions · 1 mark each · the timer starts with your first answer and the test submits itself when time runs out.
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Q1.AlgebraFind the sum of the first 28 terms of the AP 6, 15, 24, …
Answer: D — 3570
Sₙ = n/2 × [2a + (n − 1)d] = 28/2 × [12 + 243] = 3,570.
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Q2.PhysicsThe upthrust on a body immersed in a fluid equals the weight of fluid displaced. This is:
Answer: B — Archimedes’ principle
Archimedes’ principle.
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Q3.ChemistryWhich gas is responsible for most of the greenhouse effect from human activity?
Answer: A — Carbon dioxide
CO₂ from burning fossil fuels is the largest human-caused contributor.
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Q4.English GrammarChoose the correct option: I would rather you ___ now.
Answer: B — left
“Would rather + subject” is followed by the past tense for present/future meaning: “left”.
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Q5.Logical ReasoningWhat is the angle between the hour and minute hands of a clock at 12:15?
Answer: B — 82.5°
Angle = |30H − 5.5M| = |30×12 − 5.5×15| = 277.5°; the smaller angle is 360 − that = 82.5°.
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Q6.AlgebraSolve: x² + 4x − 12 = 0
Answer: C — -6, 2
Find two roots with sum -4 and product -12: 2 and -6. So x² + 4x − 12 = (x − 2)(x + 6) = 0.
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Q7.PhysicsA current of 1.5 A flows through a 4 Ω resistor. What is the potential difference across it?
Answer: A — 6 V
Ohm’s law: V = IR = 1.5 × 4 = 6 V.
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Q8.ChemistryWhat is the pH of a solution with [H⁺] = 10⁻⁴ mol/L?
Answer: C — 4
pH = −log[H⁺] = −log(10⁻⁴) = 4.
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Q9.English GrammarChoose the correct option: I look forward to ___ from you.
Answer: D — hearing
In “look forward to”, “to” is a preposition, so it takes a gerund: “hearing”.
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Q10.Logical ReasoningWhich number is the odd one out: 27, 55, 61, 65?
Answer: D — 61
27, 65, 55 are composite; 61 is prime.
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Q11.AlgebraSolve: 2x + 5y = 0 and 2x + y = 8
Answer: C — x = 5, y = -2
Elimination/substitution gives x = 5, y = -2. Check: 2(5) + 5(-2) = 0 ✓ and 2(5) + 1(-2) = 8 ✓.
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Q12.PhysicsThe bending of light as it passes from one medium to another is:
Answer: B — Refraction
Refraction is caused by a change in light’s speed.
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Q13.ChemistryThe hardest naturally occurring substance is:
Answer: C — Diamond
Diamond, a carbon allotrope, is the hardest natural material.
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Q14.English GrammarChoose the correct option: This is the best book I ___.
Answer: B — have ever read
A superlative + experience up to now uses the present perfect: “have ever read”.
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Q15.Logical ReasoningWhat day of the week was 20 July 2028?
Answer: C — Thursday
Using odd days (or Zeller’s rule), 20 July 2028 falls on a Thursday.
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Q16.AlgebraSolve: x² − 1 = 0
Answer: A — -1, 1
Find two roots with sum 0 and product -1: -1 and 1. So x² − 1 = (x + 1)(x − 1) = 0.
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Q17.PhysicsFind the kinetic energy of a 15 kg body moving at 12 m/s.
Answer: A — 1,080 J
KE = ½mv² = ½ × 15 × 12² = 1,080 J.
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Q18.Chemistry40 g of KCl (molar mass 74.5) is dissolved to make 1000 mL of solution. Find the molarity.
Answer: A — 0.537 M
Moles = 40/74.5 = 0.537; molarity = moles ÷ litres = 0.537 ÷ 1 = 0.537 M.
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Q19.English GrammarChoose the correct option: She is senior ___ me by two years.
Answer: D — to
Latin comparatives (senior, junior, superior, inferior) take “to”, not “than”.
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Q20.Logical ReasoningWhat is the angle between the hour and minute hands of a clock at 1:00?
Answer: B — 30°
Angle = |30H − 5.5M| = |30×1 − 5.5×0| = 30°.
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Q21.AlgebraSolve: x² + 8x − 9 = 0
Answer: A — -9, 1
Find two roots with sum -8 and product -9: 1 and -9. So x² + 8x − 9 = (x − 1)(x + 9) = 0.
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Q22.PhysicsAn object at rest stays at rest unless acted on by a net force. This is:
Answer: C — Newton’s first law (inertia)
Newton’s first law, the law of inertia.
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Q23.ChemistryThe periodic table is arranged in order of increasing:
Answer: D — Atomic number
The modern periodic table orders elements by atomic number.
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Q24.English GrammarChoose the correct option: If I ___ you, I would accept the offer.
Answer: C — were
The subjunctive “were” is used in hypothetical conditions: “If I were you…”.
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Q25.Logical ReasoningIf MILK is coded as PLON, how is STAR coded?
Answer: C — VWDU
Each letter moves 3 places forward in the alphabet (MILK → PLON), so STAR → VWDU.
How the mock test works
- The timer starts with your first answer; the test submits itself when time runs out.
- Choose the negative marking that matches your exam (many Indian exams deduct ¼ or ⅓ of a mark — check the official notification).
- After submitting you get your score, accuracy, time taken and a topic-wise breakdown, then every explanation.
- “New mock test” builds another paper — calculation questions get new numbers.
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) |