Q. The best evidence for the existence and movement of particles in liquids was given by -
1) John Dalton
2) Ernest Rutherford
3) J. J. Thomson
4) Robert Brown
Q. Which of the following is the best conductor of electricity?
1) Copper metal
2) Aluminium metal
3) Silver metal
4) Iron metal
Q. Which of the following statements is/are correct?
I. The force between two bodies is directly proportional to the product of their masses.
II. The force between two bodies is inversely proportional to the square of the distance between them.
III. The force between two bodies is the ratio of their masses.
Correct code is -
1) Only I is correct
2) Only II is correct
3) I and II both are correct
4) I, II and III all are correct
Q. Concrete sleeper or wooden sleepers are kept below the iron rails of railway track so that -
I. The weight of the passing train is spread over a large are a of ground
II. The track may not sink into the ground
III. The distance between the two rails remains the same.
Correct code is -
1) Only I
2) Only II
3) Only III
4) All I, II and III All
Q. Aluminium is manufactured from -
1) Copper ore
2) Bauxite ore
3) Mica ore
4) Manganese ore
Q. The best malleable metal is -
1) Aluminum
2) Silver
3) Gold
4) Lead
Q. The early attempt to classify elements as metals and non-metals was made by -
1) Mendeleev
2) Lother Meyer
3) Lavoisier
4) Henry Moseley
Q. The magnet is strongest near the -
1) Poles of the magnet
2) Ends of the magnet
3) Centre of the magnet
4) On equator point from the poles of the magnet
Q. Which is the device used to detect and measure small electric current in a circuit?
1) Tansformer
2) Galvanometer
3) Thermometer
4) Electromagnetic Induction
Q. The lowest temperature at which an oil gives sufficient vapours to form an explosive mixture with air is known as -
1) Flash Point
2) Smoke Point
3) Explosive Point
4) Acidic Flux
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