General Knowledge Quiz

What happens to the frequency of a wave if the wavelength is doubled in a given medium?

• It is halved

• It doubles

• It remains the same

• It becomes zero

Which gas is produced when a metal reacts with an acid, a concept studied in class 8 science?

• Oxygen

• Hydrogen

• Carbon dioxide

• Nitrogen

Which part of the plant is responsible for photosynthesis?

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If x² - 4x + 4 = 0, what is the value of x?

• 4, -4

• 2, -2

• 2, 2

• No real solution

Who was the first President of Independent India?

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Why does a pencil appear bent when placed in water?

• Reflection

• Refraction

• Diffraction

• Scattering

Which of the following is an example of a covalent compound?

• NaCl

• MgO

• KCl

• H₂O

Which blood group is known as the universal donor?

• A

• B

• O

• AB

What is the value of (3 + 2)²?

• 25

• 5²

• 10

• 9

Which is the longest river in India?

• Yamuna

• Brahmaputra

• Godavari

• Ganga