IMPORTANT QUESTIONS

1. Q211 A bullet of mass 20 g is fired with a velocity of 100 m/s. If the mass of the gun is 10 kg, what would be the recoil velocity of the gun?

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2. Q212 Define breathing. State the differences between breathing and respiration.

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3. Q213 What are the different ways in which glucose is oxidised to provide energy in various organisms?

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4. Q214 When a carpet is beaten with a stick, dust comes out of it. Explain.

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5. Q215 How are the following changes different from each other? a. Changing of milk into curd b. Hot milk becoming cold milk

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6. Q216 Write balanced chemical equation with the help of chemical symbols and forms reactions : (i) Zinc + Silver nitrate →→→ Zinc nitrate + Silver (ii) Copper oxide + Hydrogen →→→ Copper + Water

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7. Q217 An object of mass 40 kg is moving with a velocity of 15 m/s, its kinetic energy will be:

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8. Q218 There was a problem with the cooker, but I____ it now.

   • a) have fixed
   • b) have been fixing
   • c) fixed
   • d) fix

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9. Q219 Describe any three properties of colloid.

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10. Q220 Where are proteins synthesised inside the cell?

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