BPSC TRE 4.0 Mock Test Free: 30 GS Questions with Answers (Class 1–5, 6–8, 9–10)

This free BPSC TRE 4.0 mock test has 30 General Studies questions with answers and short explanations. In BPSC TRE, every candidate takes the GS part whatever their class level or subject, so this test is useful whether you are applying for Class 1–5, 6–8, 9–10 or 11–12.

The questions cover history, polity, geography, science, maths, reasoning and Bihar GK, in the style of the TRE 3.0 GS paper. Try to answer each question before you read the answer below it.

How to Take This Mock Test

• Time yourself. Give yourself 30 minutes for 30 questions. In TRE 3.0, candidates had 150 minutes for 150 questions, so one minute per question is the real exam pace.
• Write your answers first. Note your answers on paper, then check them against the answer key at the end.
• Know how much GS counts. In TRE 3.0, GS had 120 of the 150 questions for Class 1–5 and 40 questions for Class 6–12. Check the TRE 4.0 notification for the current pattern.
• The real paper has five options. BPSC TRE questions usually include (D) “More than one of the above” and (E) “None of the above”. This practice set uses four options to keep it quick.

History and National Movement (Q1–6)

Q1. Who founded the Maurya dynasty?

(A) Bindusara
(B) Chandragupta Maurya
(C) Ashoka
(D) Bimbisara

Answer: (B) Chandragupta Maurya. Chandragupta Maurya founded the Maurya Empire around 321 BCE with the help of Chanakya (Kautilya). Bindusara was his son and Ashoka his grandson.

Q2. Ashoka fought the Kalinga War in about which year?

(A) 305 BCE
(B) 273 BCE
(C) 261 BCE
(D) 232 BCE

Answer: (C) 261 BCE. The Kalinga War was fought around 261 BCE. The bloodshed led Ashoka to adopt Buddhism and the policy of Dhamma, as recorded in his Rock Edict XIII.

Q3. In which year was the Battle of Plassey fought?

(A) 1757
(B) 1764
(C) 1765
(D) 1857

Answer: (A) 1757. At Plassey in 1757, the East India Company under Robert Clive defeated Siraj-ud-Daulah, the Nawab of Bengal. The Battle of Buxar followed in 1764.

Q4. Who founded the Indian National Congress in 1885?

(A) Dadabhai Naoroji
(B) W. C. Bonnerjee
(C) A. O. Hume
(D) Surendranath Banerjee

Answer: (C) A. O. Hume. Allan Octavian Hume, a retired British civil servant, founded the Congress in 1885. W. C. Bonnerjee was the president of its first session in Bombay.

Q5. The Jallianwala Bagh massacre took place in which year?

(A) 1915
(B) 1919
(C) 1920
(D) 1922

Answer: (B) 1919. On 13 April 1919, troops under General Dyer fired on a peaceful gathering at Jallianwala Bagh in Amritsar.

Q6. The Quit India Movement was launched in:

(A) 1930
(B) 1940
(C) 1942
(D) 1946

Answer: (C) 1942. The Congress passed the Quit India resolution in Bombay on 8 August 1942, and Gandhi gave the call “Do or Die”.

Indian Polity (Q7–11)

Q7. The Constitution of India came into force on:

(A) 15 August 1947
(B) 26 November 1949
(C) 26 January 1950
(D) 26 January 1952

Answer: (C) 26 January 1950. The Constitution was adopted on 26 November 1949 and came into force on 26 January 1950, which we celebrate as Republic Day.

Q8. Fundamental Rights are given in which Part of the Constitution?

(A) Part II
(B) Part III
(C) Part IV
(D) Part IVA

Answer: (B) Part III. Fundamental Rights are in Part III (Articles 12–35). Part IV has the Directive Principles, and Part IVA has the Fundamental Duties.

Q9. Article 21A of the Constitution provides free and compulsory education to children of which age group?

(A) 3 to 10 years
(B) 5 to 12 years
(C) 6 to 14 years
(D) 6 to 18 years

Answer: (C) 6 to 14 years. Article 21A was added by the 86th Amendment in 2002. The Right of Children to Free and Compulsory Education (RTE) Act, 2009 puts it into effect.

Q10. Which Article of the Constitution abolishes untouchability?

(A) Article 14
(B) Article 15
(C) Article 17
(D) Article 21

Answer: (C) Article 17. Article 17 abolishes untouchability and forbids its practice in any form.

Q11. What is the minimum age to become the President of India?

(A) 25 years
(B) 30 years
(C) 35 years
(D) 40 years

Answer: (C) 35 years. Under Article 58, a person must be at least 35 years old to be elected President.

Geography (Q12–15)

Q12. Which is the longest river in India?

(A) Godavari
(B) Ganga
(C) Yamuna
(D) Brahmaputra

Answer: (B) Ganga. The Ganga is about 2,525 km long and is the longest river in India. It also flows through Bihar from west to east.

Q13. The Tropic of Cancer does NOT pass through which of these states?

(A) Rajasthan
(B) Jharkhand
(C) Bihar
(D) Gujarat

Answer: (C) Bihar. The Tropic of Cancer passes through Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura and Mizoram, but not Bihar.

Q14. Indian Standard Time is based on which longitude?

(A) 75° E
(B) 80° E
(C) 82.5° E
(D) 90° E

Answer: (C) 82.5° E. IST is based on the 82.5° E meridian, which passes near Mirzapur in Uttar Pradesh. IST is 5 hours 30 minutes ahead of GMT.

Q15. Which soil is best suited for growing cotton?

(A) Black soil
(B) Laterite soil
(C) Alluvial soil
(D) Desert soil

Answer: (A) Black soil. Black soil, also called regur, holds moisture well, which makes it ideal for cotton. It is found mainly on the Deccan plateau.

General Science (Q16–21)

Q16. What is the chemical formula of common salt?

(A) KCl
(B) NaCl
(C) Na₂CO₃
(D) NaHCO₃

Answer: (B) NaCl. Common salt is sodium chloride. Na₂CO₃ is washing soda and NaHCO₃ is baking soda.

Q17. Scurvy is caused by a deficiency of which vitamin?

(A) Vitamin A
(B) Vitamin B1
(C) Vitamin C
(D) Vitamin D

Answer: (C) Vitamin C. Lack of vitamin C causes scurvy, with bleeding gums. Vitamin A deficiency causes night blindness, B1 causes beriberi and D causes rickets.

Q18. What is the SI unit of force?

(A) Joule
(B) Watt
(C) Newton
(D) Pascal

Answer: (C) Newton. Force is measured in newtons (N). The joule is the unit of work and energy, the watt of power and the pascal of pressure.

Q19. Which gas do plants release during photosynthesis?

(A) Carbon dioxide
(B) Nitrogen
(C) Oxygen
(D) Hydrogen

Answer: (C) Oxygen. During photosynthesis, plants use carbon dioxide and water in the presence of sunlight to make glucose, and release oxygen.

Q20. Which planet is known as the Red Planet?

(A) Venus
(B) Mars
(C) Jupiter
(D) Mercury

Answer: (B) Mars. Iron oxide (rust) on its surface gives Mars its reddish colour.

Q21. Which is the largest gland in the human body?

(A) Pancreas
(B) Thyroid
(C) Liver
(D) Pituitary

Answer: (C) Liver. The liver is the largest gland in the human body. It produces bile, which helps digest fats.

Mathematics (Q22–26)

Q22. What is 25% of 480?

(A) 100
(B) 110
(C) 120
(D) 125

Answer: (C) 120. 25% is one-fourth, and 480 ÷ 4 = 120.

Q23. What is the average of the first 10 natural numbers?

(A) 5
(B) 5.5
(C) 6
(D) 10

Answer: (B) 5.5. The sum of 1 to 10 is 55, and 55 ÷ 10 = 5.5. Shortcut: the average of the first n natural numbers is (n + 1) ÷ 2.

Q24. What is the simple interest on ₹5,000 at 8% per year for 3 years?

(A) ₹1,000
(B) ₹1,200
(C) ₹1,400
(D) ₹1,500

Answer: (B) ₹1,200. Simple interest = (P × R × T) ÷ 100 = (5,000 × 8 × 3) ÷ 100 = ₹1,200.

Q25. A train 200 m long runs at 72 km/h. How long will it take to pass a pole?

(A) 8 seconds
(B) 10 seconds
(C) 12 seconds
(D) 15 seconds

Answer: (B) 10 seconds. 72 km/h = 72 × 5/18 = 20 m/s. To pass a pole, the train covers its own length: 200 ÷ 20 = 10 seconds.

Q26. What is the LCM of 12, 18 and 24?

(A) 36
(B) 48
(C) 72
(D) 144

Answer: (C) 72. 12 = 2² × 3, 18 = 2 × 3² and 24 = 2³ × 3. Taking the highest powers, LCM = 2³ × 3² = 72.

Reasoning (Q27–28)

Q27. Find the next number in the series: 2, 6, 12, 20, 30, ?

(A) 40
(B) 42
(C) 44
(D) 48

Answer: (B) 42. The differences are 4, 6, 8, 10, so the next difference is 12, and 30 + 12 = 42. Each term is also n × (n + 1): 1×2, 2×3, 3×4 and so on, so the sixth term is 6 × 7 = 42.

Q28. If CAT is written as DBU in a code, how is DOG written in that code?

(A) EPH
(B) EOH
(C) CNF
(D) EPG

Answer: (A) EPH. Each letter moves one step forward in the alphabet: C→D, A→B, T→U. So D→E, O→P, G→H gives EPH.

Bihar GK (Q29–30)

Q29. Ancient Vaishali was the capital of which republic (gana-sangha)?

(A) Vajji (Licchavi)
(B) Kosala
(C) Avanti
(D) Gandhara

Answer: (A) Vajji (Licchavi). Vaishali was the capital of the Vajji confederacy led by the Licchavis, and is often called one of the world’s earliest republics. Mahavira was born near Vaishali.

Q30. Which is the state bird of Bihar?

(A) Peacock
(B) House sparrow
(C) Indian roller
(D) Sarus crane

Answer: (B) House sparrow. The house sparrow (gauraiya) is Bihar’s state bird.

Answer Key

Q1–10	Q11–20	Q21–30
1. B	11. C	21. C
2. C	12. B	22. C
3. A	13. C	23. B
4. C	14. C	24. B
5. B	15. A	25. B
6. C	16. B	26. C
7. C	17. C	27. B
8. B	18. C	28. A
9. C	19. C	29. A
10. C	20. B	30. B

How to Read Your Score

• 25 or more: your GS base is strong. Move to full-length 150-question mocks under exam timing.
• 18 to 24: you are on track. Note the sections where you lost marks and revise them before your next test.
• Below 18: go back to NCERT and Bihar Board textbooks for the weak sections, then solve the TRE 3.0 GS papers.

Every wrong answer here is a topic to revise. Write it in an error notebook and check it again before your next mock.

Practise More for BPSC TRE 4.0

For more Bihar questions, solve our 50 Bihar GK questions for BPSC TRE. See the real paper level in the BPSC TRE General Studies previous year questions, plan your remaining weeks with the BPSC TRE 4.0 60-day study plan, and keep an eye on the BPSC TRE 4.0 exam date.

Frequently Asked Questions (FAQs)

💡 Take more BPSC TRE 4.0 mock tests in the ExamYaari app. Free to start, Premium under ₹1 a day. Get ExamYaari on Google Play or download on the App Store.