Q. The process of movement of molecules from a higher concentration place to a lower concentration places is known as :
1) Condensation
2) Evaporation
3) Diffusion
4) Sublimation
Q. K-shell is the .......... energy level.
1) Third
2) Fourth
3) First
4) Second
Q. In some machines, why is using oil as a lubricant not advisable?
1) Oil makes the movement of the parts tough
2) Sometime oil leaks into the parts of the machine causing undesirable obstruction of working
3) Oil sometimes increases friction
4) Oil makes die machine parts and the whole place dirty
Q. The acceleration experienced by an object during a free fall is independent of its -
1) Velocity
2) Pressure
3) Mass
4) Energy
Q. What is the minimum temperature to which a fuel must be heated so that it may catch fire and start burning?
1) Normal temperature
2) Neutral temperature
3) Boiling temperature
4) Ignition temperature
Q. How is the ammeter connected in all circuits to measure current flowing in it?
1) In parallel
2) Across
3) In series
4) In line
Q. If a convex lens forms a real inverted same size image at 30 cm, then the object is placed ......... in front of the lens.
1) 30 cm
2) 40 cm
3) 10 cm
4) 20 cm
Q. If the frequency of a sound wave is 100 Hz, then what is its time period?
1) 0.1 second
2) 0.01 second
3) 10 seconds
4) 1 second
Q. Which of the following is TRUE about the process of evaporation?
1) It does not depend upon humidity level
2) It increases with increase in surface area
3) It decreases with increase in wind speed
4) It decreases with increase in temperature
Q. CGS system of measurement units stands for -
1) Coulomb, Gauss, Steradian
2) Celsius, Grade, Second
3) Centiliter, Gallon, Siemens
4) Centimeter, Gram, Second
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