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Scientific Achievements — Homi Bhabha Class 9 General Knowledge MCQs with Solutions
Free Homi Bhabha Class 9 General Knowledge Scientific Achievements MCQs with step-by-step solutions covering Indian Achievements (ISRO, Nuclear Energy), Global Breakthrough Technologies. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — Indian Achievements (ISRO, Nuclear Energy) · easy · theory
The first Indian citizen to travel into space (in 1984, aboard a Soviet spacecraft) was:
A. Vikram Sarabhai
B. Sunita Williams
C. Rakesh Sharma ✓ Correct
D. Kalpana Chawla
Solution: Wing Commander Rakesh Sharma became the first Indian in space in 1984 aboard Soyuz T-11.
Q2 — Indian Achievements (ISRO, Nuclear Energy) · easy · theory
India's own regional satellite navigation system, meant to work like GPS over India, is called:
A. BeiDou
B. Galileo
C. NavIC ✓ Correct
D. GLONASS
Solution: NavIC (Navigation with Indian Constellation), built by ISRO, provides positioning over India and nearby regions.
Q3 — Indian Achievements (ISRO, Nuclear Energy) · easy · theory
The large facility at Kudankulam in Tamil Nadu is a:
A. nuclear power plant ✓ Correct
B. space telescope
C. oil refinery
D. rocket launch pad
Solution: Kudankulam is one of India's major nuclear power plants, generating electricity from nuclear fission.
Q4 — Global Breakthrough Technologies · easy · theory
A network of everyday devices such as watches, lights and fridges connected to the internet to share data is called the:
A. Internet of Things (IoT) ✓ Correct
B. Internet Explorer
C. Local Area Network
D. Random Access Memory
Solution: The Internet of Things (IoT) links ordinary objects to the internet so they can send and receive data.
Q5 — Global Breakthrough Technologies · easy · theory
The tall structures with large rotating blades that convert moving air into electricity are called:
A. wind turbines ✓ Correct
B. nuclear reactors
C. solar cells
D. transistors
Solution: Wind turbines turn the kinetic energy of wind into electrical energy using rotating blades and a generator.
Q6 — Global Breakthrough Technologies · easy · theory
Small remotely controlled flying machines now used for aerial photography and delivering parcels are called:
A. telescopes
B. satellites
C. submarines
D. drones ✓ Correct
Solution: Drones are unmanned aircraft flown by remote control or software, widely used for photography and delivery.
Q7 — Global Breakthrough Technologies · easy · theory
The modern lighting technology that gives bright light while using far less electricity than old filament bulbs is the:
A. kerosene lamp
B. incandescent bulb
C. LED ✓ Correct
D. candle
Solution: LEDs (light-emitting diodes) are highly energy-efficient and last much longer than older bulbs.
Q8 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
India's Chandrayaan-3 mission (2023) made India the first country to land near the Moon's:
A. far side centre
B. equator
C. north pole
D. south pole ✓ Correct
Solution: Chandrayaan-3's Vikram lander touched down near the lunar south pole in August 2023 — a world first.
Q9 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
India's Mars Orbiter Mission (Mangalyaan) was remarkable because India reached Mars orbit:
A. on its very first attempt ✓ Correct
B. using a manned spacecraft
C. before any other country
D. after ten attempts
Solution: India became the first nation to reach Mars orbit on its maiden attempt (2014).
Q10 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
Chandrayaan-1 (2008), India's first lunar mission, is best known for confirming the presence of ______ on the Moon:
A. gold
B. diamonds
C. water molecules ✓ Correct
D. oxygen gas
Solution: Chandrayaan-1 provided evidence of water/hydroxyl on the lunar surface.
Q11 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
The scientist known as the "Father of the Indian Nuclear Programme" is:
A. Satyendra Nath Bose
B. Vikram Sarabhai
C. Homi J. Bhabha ✓ Correct
D. S. Chandrasekhar
Solution: Homi Jehangir Bhabha founded India's nuclear research programme (the Homi Bhabha exam is named in his honour).
Q12 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
India's first nuclear research reactor, commissioned in 1956, was named:
A. Tarapur
B. Apsara ✓ Correct
C. Dhruva
D. Kalpakkam
Solution: Apsara was Asia's first research reactor, built at Trombay.
Q13 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
In 2017, ISRO set a world record by launching how many satellites in a single mission?
A. 250
B. 10
C. 104 ✓ Correct
D. 50
Solution: ISRO launched 104 satellites on a single PSLV flight in 2017.
Q14 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
India's solar mission launched to study the Sun is named:
A. Aditya-L1 ✓ Correct
B. Mangalyaan
C. Rohini
D. Gaganyaan
Solution: Aditya-L1 is India's first mission dedicated to studying the Sun.
Q15 — Global Breakthrough Technologies · hard · theory
The first artificial satellite launched into space (1957) was:
A. Explorer 1
B. Sputnik 1 ✓ Correct
C. Hubble
D. Aryabhata
Solution: The Soviet Union launched Sputnik 1, the first artificial satellite, in 1957.
Q16 — Global Breakthrough Technologies · hard · theory
The powerful space telescope launched in 2021 to observe the early universe in infrared is the:
A. Chandra Telescope
B. James Webb Space Telescope ✓ Correct
C. Hubble Space Telescope
D. Kepler Telescope
Solution: The James Webb Space Telescope (JWST), launched in 2021, observes the universe in infrared.
Q17 — Global Breakthrough Technologies · hard · theory
The gene-editing technology that allows scientists to precisely change DNA is known as:
A. GPS
B. SONAR
C. CRISPR ✓ Correct
D. MRI
Solution: CRISPR is a powerful tool for editing genes with great precision.
Q18 — Global Breakthrough Technologies · hard · theory
The first successful human heart transplant was performed in 1967 by:
A. Dr Edward Jenner
B. Dr Christiaan Barnard ✓ Correct
C. Dr Jonas Salk
D. Dr Alexander Fleming
Solution: Dr Christiaan Barnard carried out the first human heart transplant in South Africa in 1967.
Q19 — Global Breakthrough Technologies · hard · theory
The type of vaccine technology used in several COVID-19 vaccines, based on genetic material, is:
A. antiseptic
B. painkiller
C. antibiotic
D. mRNA vaccine ✓ Correct
Solution: mRNA vaccines instruct cells to make a viral protein, triggering immunity.
Q20 — Global Breakthrough Technologies · hard · theory
The World Wide Web (www), which revolutionised information sharing, was invented by:
A. Tim Berners-Lee ✓ Correct
B. Thomas Edison
C. Bill Gates
D. Charles Babbage
Solution: Tim Berners-Lee invented the World Wide Web in 1989.
Q21 — Global Breakthrough Technologies · hard · theory
The first living organism (a sheep) to be successfully cloned was named:
A. Laika
B. Dolly ✓ Correct
C. Bella
D. Rani
Solution: Dolly the sheep, cloned in 1996, was the first mammal cloned from an adult cell.
Q22 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
India's three-stage nuclear power programme aims ultimately to use which resource, found abundantly in India's coastal sands, as reactor fuel?
A. Thorium ✓ Correct
B. Coal
C. Helium
D. Gold
Solution: India has large thorium reserves in monazite sands, so the long-term nuclear plan is built around thorium as fuel.
Q23 — Indian Achievements (ISRO, Nuclear Energy) · hard · theory
Assertion (A): ISRO launches satellites into polar orbits with the PSLV but uses the GSLV for geostationary orbits. Reason (R): Reaching a geostationary orbit needs a more powerful cryogenic upper stage. Choose the correct option:
A. Both A and R are false
B. Both A and R are true, but R does not explain A
C. A is true but R is false
D. Both A and R are true, and R correctly explains A ✓ Correct
Solution: A geostationary orbit is far higher and demands the extra thrust of a cryogenic stage, which is exactly why the GSLV is chosen over the PSLV.
Q24 — Indian Achievements (ISRO, Nuclear Energy) · hard · numerical
A radioactive fuel sample has a half-life of 8 years. If 80 g is stored today, how much of it will remain after 24 years?
A. 5 g
B. 10 g ✓ Correct
C. 20 g
D. 40 g
Solution: 24 years is 3 half-lives (24 ÷ 8). The amount halves each time: 80 → 40 → 20 → 10 g.
Q25 — Global Breakthrough Technologies · hard · theory
Quantum computers can, in principle, be far more powerful than ordinary computers because their basic unit, the qubit, can:
A. store only the value 1
B. represent 0 and 1 at the same time (superposition) ✓ Correct
C. store only the value 0
D. work without any electricity
Solution: Unlike a normal bit that is either 0 or 1, a qubit can exist in a superposition of both, letting quantum computers explore many possibilities at once.
Q26 — Global Breakthrough Technologies · hard · numerical
Suppose the number of transistors on a chip doubles about every 2 years. A chip today holds about 1 million transistors. At this rate, a chip about 6 years from now would hold roughly:
A. 3 million
B. 8 million ✓ Correct
C. 6 million
D. 4 million
Solution: 6 years is 3 doubling periods (6 ÷ 2). Doubling three times multiplies by 2 × 2 × 2 = 8, giving about 8 million.
Q27 — Global Breakthrough Technologies · hard · theory
Assertion (A): Optical fibres can carry very large amounts of data over long distances at high speed. Reason (R): They transmit information as pulses of light travelling through thin strands of glass. Choose the correct option:
A. A is true but R is false
B. Both A and R are false
C. Both A and R are true, and R correctly explains A ✓ Correct
D. Both A and R are true, but R does not explain A
Solution: Optical fibres send data as light pulses through glass, and it is exactly this light-based transmission that gives them their huge speed and capacity.
Q28 — Indian Achievements (ISRO, Nuclear Energy) · medium · theory
ISRO, the Indian space agency, stands for:
A. Indian Satellite Research Operation
B. Indian Science Research Office
C. International Space Research Organisation
D. Indian Space Research Organisation ✓ Correct
Solution: ISRO is the Indian Space Research Organisation, headquartered in Bengaluru.
Q29 — Indian Achievements (ISRO, Nuclear Energy) · medium · theory
India's first satellite, launched in 1975, was named:
A. Aryabhata ✓ Correct
B. Rohini
C. Bhaskara
D. INSAT-1A
Solution: Aryabhata was India's first satellite, named after the ancient mathematician.
Q30 — Indian Achievements (ISRO, Nuclear Energy) · medium · theory
The reliable ISRO launch vehicle used to place satellites in polar orbits is the:
A. PSLV ✓ Correct
B. Boeing 747
C. Concorde
D. INSAT
Solution: PSLV (Polar Satellite Launch Vehicle) is ISRO's workhorse rocket.