Welcome to your Science Quiz 21
1.
Diffusion of light in the atmosphere takes place due to: [2003]
2.
Which one of the following statements is not correct? [2003]
3.
Regarding the atom of a chemical element, the magnetic quantum number refers to: [2003]
4.
Assertion (A): The weight of a body decreases with the increase of latitude on earth: [2003] Reason (R): The earth is not perfect sphere
Choose the correct option.
5.
Consider the following natural phenomena: [2002]
- Terrestrial heatingÂ
- Reflection of lightÂ
- Refraction of lightÂ
- Diffraction of lightÂ
Due to which of these phenomena is mirage formed?
6.
Sun’s halo is produced by the refraction of light in: [2002]
7.
Consider the following statements: [2002]
- Light of longer wavelength is scattered much more than the light of shorter wavelength.Â
- The speed of visible light in water is 0.95 times and speed in vacuum.Â
- Radio waves are produced by rapidly oscillating electrical currents.Â
- To detect the over speeding vehicles, police use the Doppler effect of reflected short radio wavesÂ
Which of these statements are correct?
8.
Assertion (A): With the increase of temperature, the viscosity of glycerine increases: [2002] Reason (R): Rise of temperature increases kinetic energy of molecules.
Choose the correct option.
9.
Assertion (A): An iron ball floats on mercury but gets immersed in water: [2002] Reason (R): The specific gravity of iron is more than that of mercury.
Choose the correct option.
10.
An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then: [2003]
