Q1. Which one of the following sets of colour combinations is added in colour vision in TV?

Q2. A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to

Q3. Water is a highly effective coolant for a car engine because

Q4. Scalding with steam is more severe than scalding by boiling water because

Q5. In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed

Q6. The cracking sound heard when dry hair is combed with a hard rubber comb is due to

Q7. Detergents dissolved in water help in cleaning clothes by

Q8. The absorption of ink by blotting paper involes

Q9. Materials for rain-proof coats and tents owe their water proof properties to

Q10. A satellite moving round the earth with a uniform speed has

Q11. General Knowledge Fuse wire is made of

Q12. Which one of the following is the main culprit in the thinning of Ozone layer in the earth's stratosphere?

Q13. Steering of a car involves

Q14. The property by virtue of which metals can be beaten into thin sheets is known as

Q5. The sky appears blue because the earth's atmosphere

Q16. A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to

Q17. When water is filled in a bottle and is allowed to freeze, the bottle breaks because

Q8. During a total solar eclipse there is most likely to be

Q19. Heating element of an electric heater is made up of

Q20. In an oil lamp, the oil rises up in the wick due to