Basic science

Q.1. Radio-active elements can be traced out in living cell through a technique called
A. Auto radiography
B. Chromatography
C. Centrifugation
D. All of the above
Ans. Auto radiography


Q.2. Clear nights are colder than cloudy nights because of
A. Insolation
B. Radiation
C. Condensation
D. Conduction
Ans. Radiation


Q.3. The fuse in our domestic electric circuit melts when there is a high rise in
A. Inductance
B. Current
C. Capacitance
D. Resistance
Ans. Current


Q.4. Pure water is bad conductor of electricity due to
A. Not volatile
B. Feebly ionized
C. A very good solvent
D. A non-polar solvent
Ans. Feebly ionized


Q.5. Electrostatic precipitator is used to control
A. Air pollutants
B. Water pollutants
C. Chemical pollutants
D. Radio-active pollutants
Ans. Air pollutant


Q.6. Which conservation principle is applicable in the case of the motion of a rocket?
A. Conservation of energy
B. Conservation of momentum
C. Conservation of charge
D. Conservation of mass
Ans. Conservation of momentum


Q.7. Speed of sound is unaffected by change in
A. Pressure
B. Volume
C. Humidity
D. Temperature
Ans. Pressure


Q.8. An athlete runs before long jump to get advantage on
A. Inertia of motion
B. Moment of a force
C. Frictional force
D. Principle of moment
Ans. Inertia of motion


Q.9. A periscope works on the principle of
A. Laws of Reflection
B. Refraction
C. Diffraction
D. None
Ans. Laws of reflection


Q.10. The different colour of different stars is due to the variation of
A. Density
B. Pressure
C. Temperature
D. Radiation from them
Ans. Temperature

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