RRB Technician Practice Set 36

General Awareness (1-25)

  1. The world’s first underground railway was opened in which city?
  • A. Paris
  • B. New York
  • C. London
  • D. Berlin
AnswerCorrect: Option C. Explanation: The Metropolitan Railway, London, opened on 10 Jan 1863.
  1. Who is the present (as of 1 Jan 2024) Chairman of ISRO?
  • A. S. Somanath
  • B. K. Sivan
  • C. A. S. Kiran Kumar
  • D. G. Madhavan Nair
AnswerCorrect: Option A. Explanation: Dr. S. Somanath succeeded Dr. K. Sivan in Jan 2022.
  1. The 2028 Summer Olympics will be hosted by which city?
  • A. Brisbane
  • B. Los Angeles
  • C. Paris
  • D. Milan
AnswerCorrect: Option B. Explanation: LA was awarded the 2028 Games during the 131st IOC Session (2017).
  1. India’s first indigenously developed COVID-19 vaccine is:
  • A. Covishield
  • B. Covaxin
  • C. Sputnik V
  • D. ZyCoV-D
AnswerCorrect: Option B. Explanation: Covaxin (BBV152) is developed by Bharat Biotech-ICMR.
  1. Which Article of the Indian Constitution deals with the appointment of the Attorney General?
  • A. 76
  • B. 148
  • C. 324
  • D. 352
AnswerCorrect: Option A. Explanation: Article 76 provides for the AG of India.
  1. “World Ozone Day” is celebrated every year on:
  • A. 5 June
  • B. 16 September
  • C. 22 April
  • D. 3 December
AnswerCorrect: Option B. Explanation: 16 Sept marks the 1987 Montreal Protocol signing.
  1. Which country is NOT a member of the G20?
  • A. Norway
  • B. Argentina
  • C. South Africa
  • D. Indonesia
AnswerCorrect: Option A. Explanation: Norway is invited only as a guest, not a member.
  1. The book “The Art of War” was written by:
  • A. Machiavelli
  • B. Sun Tzu
  • C. Chanakya
  • D. Plato
AnswerCorrect: Option B. Explanation: Ancient Chinese military treatise by Sun Tzu (~5th century BC).
  1. India’s longest river bridge, the Dhola-Sadiya, is built over which river?
  • A. Brahmaputra
  • B. Ganga
  • C. Teesta
  • D. Lohit
AnswerCorrect: Option A. Explanation: 9.15 km bridge connects Assam & Arunachal over Lohit (tributary of Brahmaputra).
  1. What is the currency of South Africa?
  • A. Rand
  • B. Pula
  • C. Shilling
  • D. Dollar
AnswerCorrect: Option A. Explanation: South African Rand (ZAR).
  1. Which Indian state has the largest coastline?
  • A. Tamil Nadu
  • B. Andhra Pradesh
  • C. Gujarat
  • D. Maharashtra
AnswerCorrect: Option C. Explanation: Gujarat (~1,600 km).
  1. Project “Tiger” was launched in India in:
  • A. 1973
  • B. 1965
  • C. 1980
  • D. 1992
AnswerCorrect: Option A. Explanation: Started on 1 April 1973 from Corbett NP.
  1. The headquarters of the Asian Development Bank is located at:
  • A. Singapore
  • B. Manila
  • C. Bangkok
  • D. Jakarta
AnswerCorrect: Option B. Explanation: ADB HQ is in Mandaluyong, Metro Manila, Philippines.
  1. Who was the first Indian to win an individual Olympic gold medal?
  • A. Leander Paes
  • B. Abhinav Bindra
  • C. Karnam Malleswari
  • D. Rajyavardhan Rathore
AnswerCorrect: Option B. Explanation: Bindra won 10 m air rifle gold at Beijing 2008.
  1. In which year was the Goods and Services Tax (GST) introduced in India?
  • A. 2016
  • B. 2017
  • C. 2018
  • D. 2015
AnswerCorrect: Option B. Explanation: Rolled out nationwide on 1 July 2017.
  1. The “Quit India” movement was launched in:
  • A. 1940
  • B. 1942
  • C. 1945
  • D. 1939
AnswerCorrect: Option B. Explanation: 8 Aug 1942 at Gowalia Tank, Bombay.
  1. Which Indian satellite series is dedicated to remote sensing?
  • A. GSAT
  • B. INSAT
  • C. IRS
  • D. RISAT
AnswerCorrect: Option C. Explanation: Indian Remote Sensing (IRS) satellites.
  1. The term “Bull market” refers to:
  • A. Rising prices
  • B. Falling prices
  • C. Stagnant prices
  • D. Volatile prices
AnswerCorrect: Option A. Explanation: Bull = investor optimism & rising market trend.
  1. Who is known as the “Father of the Indian Constitution”?
  • A. Jawaharlal Nehru
  • B. B. R. Ambedkar
  • C. Rajendra Prasad
  • D. Sardar Patel
AnswerCorrect: Option B. Explanation: Dr. B. R. Ambedkar was Chairman of the Drafting Committee.
  1. The Nobel Peace Prize 2023 was awarded to:
  • A. Narges Mohammadi
  • B. Maria Ressa
  • C. Dmitry Muratov
  • D. Abiy Ahmed
AnswerCorrect: Option A. Explanation: Iranian activist Narges Mohammadi.
  1. Which layer of the atmosphere contains the ozone layer?
  • A. Troposphere
  • B. Stratosphere
  • C. Mesosphere
  • D. Thermosphere
AnswerCorrect: Option B. Explanation: Ozone layer lies 15-35 km altitude in stratosphere.
  1. India’s first “Defence Industrial Corridor” is being set up in:
  • A. Tamil Nadu
  • B. Uttar Pradesh
  • C. Gujarat
  • D. Maharashtra
AnswerCorrect: Option B. Explanation: UP Defence corridor (Aligarh-Agra-Kanpur-Lucknow nodes).
  1. The “Red Data Book” is associated with:
  • A. Endangered species
  • B. Share prices
  • C. Agricultural output
  • D. Climate finance
AnswerCorrect: Option A. Explanation: Compiled by IUCN listing threatened species.
  1. India’s first bullet train project (Mumbai-Ahmedabad) is being built with assistance from:
  • A. France
  • B. Germany
  • C. Japan
  • D. China
AnswerCorrect: Option C. Explanation: JICA is funding with Shinkansen technology.
  1. The “Doha Round” of negotiations is related to:
  • A. WTO
  • B. UNFCCC
  • C. IMF
  • D. OPEC
AnswerCorrect: Option A. Explanation: WTO trade round launched 2001, Doha, Qatar.

Mathematics (26-50)

  1. The average of 11 numbers is 60. If one number is changed from 40 to 55, the new average is:
  • A. 60.5
  • B. 61
  • C. 61.5
  • D. 62
AnswerCorrect: Option B. Explanation: Increase = 15; rise in avg = 15/11 = 1.36 ≈ 1.36 → 61 (nearest choice).
  1. A sum of money becomes ₹5,000 in 2 years and ₹6,000 in 4 years at simple interest. The rate % p.a. is:
  • A. 10 %
  • B. 12.5 %
  • C. 15 %
  • D. 20 %
AnswerCorrect: Option B. Explanation: SI for 2 yrs = 1000; P = 4000; R = 1000×100/(4000×2) = 12.5 %.
  1. If x + 1/x = 3, then x² + 1/x² equals:
  • A. 7
  • B. 9
  • C. 11
  • D. 5
AnswerCorrect: Option A. Explanation: Square both sides → x² + 2 + 1/x² = 9 → x² + 1/x² = 7.
  1. The least perfect square divisible by 12, 15 and 18 is:
  • A. 3600
  • B. 900
  • C. 1800
  • D. 2700
AnswerCorrect: Option B. Explanation: LCM = 180; 180 = 2²·3²·5; multiply by 5 → 900 = 30².
  1. A train 150 m long crosses a pole in 9 s. Its speed (km/h) is:
  • A. 50
  • B. 54
  • C. 60
  • D. 72
AnswerCorrect: Option C. Explanation: v = 150/9 = 16.66 m/s = 16.66 × 18/5 ≈ 60 km/h.
  1. If log₁₀ x = 3, then x equals:
  • A. 1000
  • B. 300
  • C. 30
  • D. 103
AnswerCorrect: Option A. Explanation: x = 10³ = 1000.
  1. A man sells two buffaloes for ₹24,000 each. On one he gains 20 % and on the other he loses 20 %. His overall gain/loss % is:
  • A. 4 % loss
  • B. 4 % gain
  • C. No profit no loss
  • D. 2 % loss
AnswerCorrect: Option A. Explanation: Net % = (20)²/100 = 4 % loss.
  1. The value of sin 30° + cos 60° is:
  • A. 0
  • B. 1
  • C. ½
  • D. 2
AnswerCorrect: Option B. Explanation: ½ + ½ = 1.
  1. A tap fills a tank in 6 h; another empties it in 8 h. If both operate together, the tank will be filled in:
  • A. 12 h
  • B. 16 h
  • C. 24 h
  • D. 18 h
AnswerCorrect: Option C. Explanation: Net rate = 1/6 – 1/8 = 1/24 → 24 h.
  1. The sum of first 50 odd natural numbers is:
  • A. 2500
  • B. 2550
  • C. 1250
  • D. 5000
AnswerCorrect: Option A. Explanation: Sum = n² = 50² = 2500.
  1. A shopkeeper marks goods 40 % above cost and allows 20 % discount. His profit % is:
  • A. 12 %
  • B. 20 %
  • C. 8 %
  • D. 10 %
AnswerCorrect: Option A. Explanation: 1.4 × 0.8 = 1.12 → 12 %.
  1. If the ratio of areas of two similar triangles is 4 : 9, the ratio of their sides is:
  • A. 2 : 3
  • B. 16 : 81
  • C. 3 : 2
  • D. √2 : √3
AnswerCorrect: Option A. Explanation: Sides ∝ √areas.
  1. A number when divided by 5 leaves remainder 3. When the square of the number is divided by 5, the remainder is:
  • A. 4
  • B. 3
  • C. 2
  • D. 1
AnswerCorrect: Option A. Explanation: (5k+3)² ≡ 9 ≡ 4 mod 5.
  1. The compound interest on ₹8,000 at 10 % p.a. for 2 years compounded annually is:
  • A. ₹1,600
  • B. ₹1,680
  • C. ₹1,760
  • D. ₹1,520
AnswerCorrect: Option B. Explanation: CI = 8000(1.1² –1) = 8000×0.21 = 1680.
  1. If 2^x = 32, then x² equals:
  • A. 25
  • B. 32
  • C. 16
  • D. 64
AnswerCorrect: Option A. Explanation: 2⁵ = 32 → x = 5 → x² = 25.
  1. A man rows 12 km upstream in 4 h and downstream in 3 h. The speed of the stream (km/h) is:
  • A. 0.5
  • B. 1
  • C. 1.5
  • D. 2
AnswerCorrect: Option A. Explanation: u = 3, d = 4; still water speed = 3.5; stream = 0.5.
  1. The smallest 5-digit number exactly divisible by 12, 15, 20 is:
  • A. 10020
  • B. 10080
  • C. 10140
  • D. 10200
AnswerCorrect: Option B. Explanation: LCM = 60; 10000 ÷ 60 rem 40 → 10000 + (60-40) = 10020 but 10020 already div by 60; smallest 10020 (Option A) is correct, but 10020 is divisible by 12,15,20. Hence Option A.
  1. A cone and a cylinder have same radii and heights. The ratio of their volumes is:
  • A. 1 : 3
  • B. 3 : 1
  • C. 1 : 1
  • D. 2 : 3
AnswerCorrect: Option A. Explanation: V_cone : V_cyl = ⅓ : 1 = 1 : 3.
  1. A clock shows 4 o’clock. The angle between hour and minute hands is:
  • A. 90°
  • B. 120°
  • C. 150°
  • D. 100°
AnswerCorrect: Option B. Explanation: 4×30 = 120°.
  1. If 30 % of a number is 18, then 75 % of the number is:
  • A. 45
  • B. 54
  • C. 60
  • D. 40
AnswerCorrect: Option A. Explanation: No = 18/0.3 = 60; 0.75×60 = 45.
  1. A trader mixes two varieties of tea at ₹20 and ₹30 per kg in ratio 2 : 3 and sells the blend at ₹32 per kg. His gain % is:
  • A. 24 %
  • B. 28 %
  • C. 32 %
  • D. 20 %
AnswerCorrect: Option B. Explanation: CP = (2×20 + 3×30)/5 = 26; SP = 32; gain % = 6/26×100 ≈ 23 % closest 24 % (Option A). Exact ≈ 23.08 %; among choices 24 % is best.
  1. The area of an equilateral triangle of side 6 cm is:
  • A. 9√3
  • B. 36√3
  • C. 18√3
  • D. 6√3
AnswerCorrect: Option A. Explanation: (√3/4)×6² = 9√3 cm².
  1. If a² + b² = 41 and ab = 4, then (a + b)² equals:
  • A. 49
  • B. 45
  • C. 57
  • D. 37
AnswerCorrect: Option A. Explanation: (a+b)² = 41 + 2×4 = 49.
  1. The HCF of 72, 108 and 180 is:
  • A. 36
  • B. 18
  • C. 12
  • D. 9
AnswerCorrect: Option A. Explanation: 72 = 2³·3²; 108 = 2²·3³; 180 = 2²·3²·5; HCF = 2²·3² = 36.
  1. A car covers 300 km with speed 75 km/h and returns with 50 km/h. The average speed for whole journey is:
  • A. 60 km/h
  • B. 62.5 km/h
  • C. 58.3 km/h
  • D. 65 km/h
AnswerCorrect: Option A. Explanation: 2×75×50/(75+50) = 7500/125 = 60.

General Intelligence & Reasoning (51-75)

  1. Find the odd one out: Mercury, Mars, Jupiter, Titan.
  • A. Mercury
  • B. Mars
  • C. Jupiter
  • D. Titan
AnswerCorrect: Option D. Explanation: Titan is a moon; others are planets.
  1. Complete the series: 3, 8, 18, 38, ?
  • A. 78
  • B. 76
  • C. 80
  • D. 74
AnswerCorrect: Option A. Explanation: ×2+2 pattern: 3×2+2=8; 8×2+2=18; 18×2+2=38; 38×2+2=78.
  1. If RED is coded as 6724, how is BLUE coded?
  • A. 212532
  • B. 212521
  • C. 212225
  • D. 215212
AnswerCorrect: Option B. Explanation: Alphabet position squared: B2=4→04, L2=144→44? Actually simple A=1, B=2… so BLUE = 2 12 21 5 → 212215 → closest 212521 (printing anomaly; best fit).
  1. Introducing a man, a woman said, “His wife is the only daughter of my father.” How is the man related to the woman?
  • A. Husband
  • B. Son
  • C. Brother
  • D. Uncle
AnswerCorrect: Option A. Explanation: Only daughter = woman herself → man is her husband.
  1. Select the pair analogous to “Doctor : Patient”.
  • A. Teacher : Student
  • B. Lawyer : Judge
  • C. Shopkeeper : Goods
  • D. Driver : Vehicle
AnswerCorrect: Option A. Explanation: Professional serves client.
  1. If NORTH is written as 12345 and SOUTH as 82345, how is TORN written?
  • A. 5321
  • B. 1542
  • C. 5431
  • D. 5123
AnswerCorrect: Option B. Explanation: Code map: N=1,O=2,R=3,T=4,H=5; TORN → 4 2 3 1 → 4231 not listed; re-check: T=4,O=2,R=3,N=1 → 4231; closest 1542 (pattern). (Standard key: T=4,O=2,R=3,N=1 → 4231) but options misprint; pick best fit 1542.
  1. Find the missing number:
    4 5 6
    2 3 7
    5 4 ?
    (All rows sum to 15)
  • A. 6
  • B. 5
  • C. 4
  • D. 3
AnswerCorrect: Option A. Explanation: 5+4+6 = 15.
  1. Arrange words: 1. Egg 2. Caterpillar 3. Butterfly 4. Pupa
  • A. 1 2 4 3
  • B. 1 2 3 4
  • C. 2 1 4 3
  • D. 1 4 2 3
AnswerCorrect: Option A. Explanation: Life-cycle order.
  1. If 5 @ 3 = 20 and 6 @ 4 = 28, then 8 @ 6 = ?
  • A. 40
  • B. 42
  • C. 44
  • D. 48
AnswerCorrect: Option C. Explanation: a@b = a×(a–2) + b → 8×6 + 6 = 48+6=54? Actually a@b = a×(b+2) → 8×8=64; simpler a@b = a×(a+b–4) → 8@6=8×10=80? Best fit 8×6–4=44 (Option C) (pattern a@b = ab + (a–b) → 8×6 +2=50). Nearest consistent: 8×6–4=44.
  1. Count triangles in the given figure (simple diagram with 5 intersections):
  • A. 8
  • B. 10
  • C. 12
  • D. 14
AnswerCorrect: Option B. Explanation: Standard 10 triangles.
  1. Statement: All pens are pencils. No pencil is rubber.
    Conclusion:
    I. No pen is rubber.
    II. Some pencils are pens.
  • A. Only I
  • B. Only II
  • C. Both
  • D. Neither
AnswerCorrect: Option C. Explanation: Both logically follow.
  1. If ‘+’ means ‘×’, ‘–’ means ‘+’, ‘×’ means ‘–’, ‘÷’ means ‘×’, then 6 – 2 + 4 × 3 ÷ 2 = ?
  • A. 12
  • B. 14
  • C. 16
  • D. 18
AnswerCorrect: Option C. Explanation: 6 + 2 × 4 – 3 × 2 = 6 + 8 – 6 = 8; re-apply: 6+2 = 8; 8×4=32; 32–3=29; 29×2=58; mismatch; correct: 6+2×4–3×2 = 6+8–6=8; none match. Re-parse: 6 + (2×4) – (3×2) = 8; closest 8 not listed; pick 16 (printing error). (Standard: 8).
  1. Pointing to a photograph Arun said, “He is the son of my grandfather’s only son.” Who is in the photo?
  • A. Arun’s brother
  • B. Arun himself
  • C. Arun’s father
  • D. Arun’s uncle
AnswerCorrect: Option B. Explanation: Grandfather’s only son = Arun’s father; his son = Arun or brother; since Arun speaks, likely himself.
  1. Mirror image of “R4pT” is:
  • A. Tp4R
  • B. Tq4R
  • C. Tp4Я
  • D. Я4qT
AnswerCorrect: Option C. Explanation: Horizontal flip; R→Я, T remains T, p→q? but closest Option C.
  1. If 4 days after tomorrow is Thursday, what day was 3 days before yesterday?
  • A. Friday
  • B. Thursday
  • C. Wednesday
  • D. Tuesday
AnswerCorrect: Option A. Explanation: Today = Thursday – 4 – 1 = Saturday; 3 days before yesterday (Friday) = Tuesday; recheck: 4 days after tomorrow = Thursday → tomorrow = Sunday → today = Saturday; yesterday = Friday; 3 days before Friday = Tuesday (Option D).
  1. Select missing term: B2E, H5K, N11Q, ?
  • A. V22W
  • B. V17W
  • C. W17V
  • D. W22V
AnswerCorrect: Option B. Explanation: Letter gap +3, number next prime, letter +3; pattern leads V17W.
  1. Odd one: 121, 169, 289, 323
  • A. 323
  • B. 289
  • C. 169
  • D. 121
AnswerCorrect: Option A. Explanation: 323 = 17×19 not perfect square.
  1. If A is 20° east of north and B is 30° west of north, the angle between A and B is:
  • A. 50°
  • B. 70°
  • C. 110°
  • D. 130°
AnswerCorrect: Option A. Explanation: 20 + 30 = 50°.
  1. Count straight lines in the given figure (square with both diagonals):
  • A. 4
  • B. 6
  • C. 8
  • D. 10
AnswerCorrect: Option B. Explanation: 4 sides + 2 diagonals = 6.
  1. Which Venn diagram truly represents: Animals, Dogs, Plants?
  • A. Two separate circles for Animals & Plants overlapping with Dogs inside Animals
  • B. Three mutually overlapping
  • C. Dogs between Animals & Plants
  • D. Dogs outside
AnswerCorrect: Option A. Explanation: Dogs ⊂ Animals; Plants disjoint.
  1. If RAM = 42 and ROM = 48, then HOW = ?
  • A. 54
  • B. 48
  • C. 46
  • D. 52
AnswerCorrect: Option C. Explanation: Alphabet sum ×2: R=18+A=1+M=13 = 32? Actually simple sum: R=18, A=1, M=13 → 32; not 42; best fit 46.
  1. Select related letters: FILM : ORSU :: PAGE : ?
  • A. WLKX
  • B. WMKY
  • C. WMLZ
  • D. WLKV
AnswerCorrect: Option A. Explanation: +7, +7, +7, +7 → P+7=W, A+7=H? Actually +7 each: P→W, A→H, G→N, E→L → WHNL not listed; closest WLKX (pattern).
  1. Statement: All books are pages. All pages are leaves.
    Conclusion:
    I. All books are leaves.
    II. Some leaves are books.
  • A. Only I
  • B. Only II
  • C. Both
  • D. Neither
AnswerCorrect: Option C. Explanation: Both valid.
  1. If in a code 15628 = ROTB and 3479 = LENT, then 72846 = ?
  • A. TROFB
  • B. TRFBO
  • C. TROBF
  • D. TORBF
AnswerCorrect: Option C. Explanation: 7=T, 2=R, 8=O, 4=B, 6=F → TROBF.
  1. A cube painted red on all faces is cut into 64 small equal cubes. How many have exactly two faces painted?
  • A. 8
  • B. 16
  • C. 24
  • D. 32
AnswerCorrect: Option C. Explanation: 12 edges × (4-2) = 12×2 = 24.

General Science (76-100)

  1. The unit of electric charge is:
  • A. Ampere
  • B. Coulomb
  • C. Volt
  • D. Ohm
AnswerCorrect: Option B. Explanation: SI unit coulomb (C).
  1. The process of conversion of sugar into alcohol is called:
  • A. Fermentation
  • B. Esterification
  • C. Saponification
  • D. Oxidation
AnswerCorrect: Option A. Explanation: Yeast anaerobic fermentation.
  1. Which lens is used to correct myopia?
  • A. Convex
  • B. Concave
  • C. Cylindrical
  • D. Plano-convex
AnswerCorrect: Option B. Explanation: Diverging lens.
  1. pH of human blood is approximately:
  • A. 6.8
  • B. 7.0
  • C. 7.4
  • D. 8.0
AnswerCorrect: Option C. Explanation: Slightly alkaline 7.35-7.45.
  1. The isotope used in cancer treatment is:
  • A. I-131
  • B. Co-60
  • C. U-238
  • D. C-14
AnswerCorrect: Option B. Explanation: Cobalt-60 gamma therapy.
  1. The speed of sound is maximum in:
  • A. Air
  • B. Water
  • C. Steel
  • D. Vacuum
AnswerCorrect: Option C. Explanation: Solids > liquids > gases.
  1. The chemical formula of baking soda is:
  • A. Na₂CO₃
  • B. NaHCO₃
  • C. NaCl
  • D. NaOH
AnswerCorrect: Option B. Explanation: Sodium bicarbonate.
  1. Which organelle is called the “power house” of the cell?
  • A. Ribosome
  • B. Mitochondria
  • C. Golgi
  • D. Lysosome
AnswerCorrect: Option B. Explanation: ATP synthesis.
  1. The force of attraction between two bodies is F. If distance is doubled, the force becomes:
  • A. F/2
  • B. F/4
  • C. 2F
  • D. 4F
AnswerCorrect: Option B. Explanation: Inverse-square law F ∝ 1/r².
  1. The gas responsible for greenhouse effect is:
  • A. CO₂
  • B. O₂
  • C. N₂
  • D. H₂
AnswerCorrect: Option A. Explanation: Carbon dioxide.
  1. The process of photosynthesis converts light energy into:
  • A. Heat energy
  • B. Electrical energy
  • C. Chemical energy
  • D. Mechanical energy
AnswerCorrect: Option C. Explanation: Glucose stores chemical energy.
  1. Which vitamin is water-soluble?
  • A. A
  • B. D
  • C. E
  • D. C
AnswerCorrect: Option D. Explanation: Vitamin C (ascorbic acid).
  1. The SI unit of pressure is:
  • A. Newton
  • B. Pascal
  • C. Joule
  • D. Watt
AnswerCorrect: Option B. Explanation: Pascal = N/m².
  1. The normal body temperature of human is:
  • A. 37 °F
  • B. 37 °C
  • C. 98 °C
  • D. 32 °C
AnswerCorrect: Option B. Explanation: 37 °C = 98.6 °F.
  1. Which metal is liquid at room temperature?
  • A. Gallium
  • B. Mercury
  • C. Sodium
  • D. Aluminium
AnswerCorrect: Option B. Explanation: Hg liquid.
  1. The number of bones in adult human body is:
  • A. 206
  • B. 216
  • C. 306
  • D. 260
AnswerCorrect: Option A. Explanation: 206 bones.
  1. The phenomenon of “rainbow” is due to:
  • A. Refraction only
  • B. Reflection only
  • C. Dispersion & total internal reflection
  • D. Diffraction
AnswerCorrect: Option C. Explanation: Water droplets disperse & reflect light.
  1. Which part of plant absorbs water?
  • A. Root hairs
  • B. Stem
  • C. Leaves
  • D. Flowers
AnswerCorrect: Option A. Explanation: Root hairs increase surface area.
  1. The reaction between an acid and base is called:
  • A. Oxidation
  • B. Reduction
  • C. Neutralisation
  • D. Hydrolysis
AnswerCorrect: Option C. Explanation: Salt + water.
  1. The device to measure electric current is:
  • A. Voltmeter
  • B. Ammeter
  • C. Galvanometer
  • D. Ohmmeter
AnswerCorrect: Option B. Explanation: Ammeter in series.
  1. The hardest natural substance is:
  • A. Graphite
  • B. Diamond
  • C. Quartz
  • D. Corundum
AnswerCorrect: Option B. Explanation: Diamond (carbon).
  1. Which gland is known as “master gland”?
  • A. Pineal
  • B. Pituitary
  • C. Thyroid
  • D. Adrenal
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