Q. The pencil leads are made of mainly -
1) Lithium
2) Charocoal
3) Lead
4) Graphite
Q. Which of the following is a real image?
1) An image formed in a plain mirror
2) An image formed by a diverging lense
3) The image of actors formed on a cinema screen
4) An image formed by a convex mirror
Q. In which of the following metals did the Karddamaka Kshatrapas issue the very rare coins?
1) Copper
2) Silver
3) Potin
4) Gold
Q. A measured temperature in Fahrenheit scale is 2000F. What will be its value in Celsius scale?
1) 93.30C
2) 400C
3) 990C
4) 300C
Q. Ball bearings are used in bicycles, cars, etc., because -
1) the actual area of contact between the wheel and axle is increased
2) the effective area of contact between the wheel and axle is increased
3) the effective area of contact between the wheel and axle is reduced
4) None of the above statements is correct
Q. Liquid water is denser than ice due to -
1) Oxygen Bonding
2) Hydrogen Bonding
3) Carbon Bonding
4) Temperature
Q. The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
1) Ice is a bad conductor of heat
2) Since the surface of the lake is at the same temperature as the air, no heat is lost
3) The density of water is maximum at 40C
4) None of the statements (A), (B) and (C) given above is correct
Q. Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?
1. Dispersion
2. Refraction
3. Internal reflection
Select the correct Solution using the codes given below :
1) 1 and 2 only
2) 2 and 3 only
3) 1 and 3 only
4) 1, 2 and 3
Q. Newton's first law of motion is known as -
1) Gravity
2) Law of Inertia
3) Law of conservation of momentum
4) Vertical motion
Q. Milarite is the ore of -
1) Copper
2) Iron
3) Nickel
4) Zink
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