Q21. Who invented the light bulb?
a) Thomas Edison
b) Albert Einstein
c) Alexander Graham Bell
d) Isaac Newton
Correct Answer: Thomas Edison
Explanation: Thomas Edison is credited with inventing the practical and long-lasting electric light bulb, which revolutionized daily life by replacing oil lamps and candles.
Q22. Which is the largest bird in the world?
a) Eagle
b) Ostrich
c) Penguin
d) Peacock
Correct Answer: Ostrich
Explanation: The ostrich is the largest bird in the world. It cannot fly but can run very fast, up to 70 km/h, making it the fastest bird on land.
Q23. Who is known as the “Father of the Nation” in India?
a) Bhagat Singh
b) Jawaharlal Nehru
c) Mahatma Gandhi
d) Subhas Chandra Bose
Correct Answer: Mahatma Gandhi
Explanation: Mahatma Gandhi is called the Father of the Nation in India because of his role in the freedom struggle through non-violence and truth.
Q24. What is the name of the ship that sank in 1912 after hitting an iceberg?
a) Titanic
b) Mayflower
c) Voyager
d) Columbus
Correct Answer: Titanic
Explanation: The Titanic was a British passenger liner that sank in the North Atlantic Ocean in 1912 after colliding with an iceberg.
Q25. Which animal is called the ‘King of the Jungle’?
a) Tiger
b) Lion
c) Elephant
d) Leopard
Correct Answer: Lion
Explanation: The lion is popularly known as the ‘King of the Jungle’ because of its strength, courage, and dominant presence in the animal kingdom.
Q26. What is the national currency of Japan?
a) Yen
b) Dollar
c) Peso
d) Won
Correct Answer: Yen
Explanation: Japan uses the Yen as its official currency. It is one of the most traded currencies in the world.
Q27. How many planets are there in our Solar System?
a) 7
b) 8
c) 9
d) 10
Correct Answer: 8
Explanation: There are 8 planets in our Solar System after Pluto was reclassified as a dwarf planet in 2006.
Q28. Which gas do humans need to breathe to stay alive?
a) Carbon dioxide
b) Oxygen
c) Hydrogen
d) Nitrogen
Correct Answer: Oxygen
Explanation: Humans need oxygen to survive. It helps in releasing energy from food inside the body through respiration.
Q29. Who was the first man to step on the moon?
a) Neil Armstrong
b) Yuri Gagarin
c) Buzz Aldrin
d) Rakesh Sharma
Correct Answer: Neil Armstrong
Explanation: Neil Armstrong became the first person to walk on the moon in 1969 during NASA’s Apollo 11 mission.
Q30. Which animal gives us wool?
a) Cow
b) Sheep
c) Goat
d) Camel
Correct Answer: Sheep
Explanation: Wool is obtained from the fleece (hair) of sheep. It is used to make warm clothes like sweaters and blankets.
