Basic science

Q.1. Which method can be applied to determine purity of a metal ?
A. Boyle's law
B. Pascal's law
C. Archimedes principle
D. Newton's law
Ans. Archimedes principle


Q.2. The reason behind decrease in the boiling point of water at higher altitudes is
A. high temperature
B. low temperature
C. high atmospheric pressure
D. low atmospheric pressure
And. Low atmospheric pressure


Q.3. Which device is used to measure the wavelength of X-rays
A. Framing square
B. Bragg Spectrometer
C. Manometer
D. SWR meter
Ans. Bragg Spectrometer


Q.4. Which instrument is used to measure atomospheric humidity ?
A. Tintometer
B. Tacheometer
C. Hygrometer
D. Thermometer
Ans. Hygrometer

Q.5. What is the minimum escape velocity of rocket to be launched into space ?
A. 4Km/Sec
B. 8Km/Sec
C. 11Km/Sec
D. 13Km/Sec
Ans. 11Km/Sec


Q.6. Golden view of sea shell is due to :
A. Diffraction
B. Reflection
C. Refraction
D. Polarization
Ans. Polarisation


Q.7. Longitudinal waves cannot travel through
A. Liquid
B. Fixed dimension
C. Vacuum
D. Gas
Ans. Vacuum


Q.8. The weakest of all fundamental forces is
A. Nuclear force
B. Magnetic force
C. Electrostatic force
D. Gravitational force
Ans. Gravitational force


Q.9. Pure water is poor conductor of electricity because it is
A. A non-polar solvent
B. A very good solvent
C. Not volatile
D. Feebly ionized
Ans. Feebly ionized


Q.10. When a detergent is added to pure water, its surface tension
A. Increases
B. Decreases
C. Becomes infinite
D. Remains constant
Ans. Decreases

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