Material for rain-proof coats and tents owe their water proof properties to ________?

Related Mcqs:

1. Materials for rain-proof coats and tents owe their water proof properties to________?

   A. Surface tension
   B. Viscosity
   C. Specific gravity
   D. Elasticity

2. Rainbow is seen after rain because of hanging molecules of water which act as __________?

   A. Lens
   B. Prism
   C. Mirror
   D. Slabs

   Submitted by: Abid Hussain

3. Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?

   A. Conduction
   B. Convection
   C. Radiation
   D. Reflection
   E. None of these

4. For seeing objects at the surface of water from a submarine under water, the instrument used is ________?

   A. Periscope
   B. Telescope
   C. Kaleidoscope
   D. Spectroscope

   Submitted by: Rashid Mehmood

5. Acid rain is mainly caused by emissions of __________ in the atmosphere?

   A. Sulfur Dioxide and Potassium Nitrate
   B. Sulfur and Charcoal
   C. Nitrogen Oxide and Potassium Nitrate
   D. Sulfur Dioxide and Nitrogen Oxide

6. Fog that most often forms as warm rain falls into a cold layer of surface air is called ______________?

   A. Radiation fog
   B. Evaporation (mixing) fog
   C. Advection fog
   D. Upslope fog

   Submitted by: Mansoor Ul Haque

7. Why normal rain is slightly acidic?

   A. due to presence of dust in air
   B. carbon dioxide and water in clouds react to form carbonic acid
   C. Ozone depletion
   D. All of these

   Submitted by: Palestine

8. Instrument of rain gauge is _________?

   A. Drosometer
   B. Ombrometer
   C. Micrometer
   D. Pyrometer

   Submitted by: Shuaib Uddin

9. Rain drops fall from great height Which among the following statements is true regarding it?

   A. they fall with that ultimate velocity, which are different for different droplets
   B. they fall with same ultimate velocity
   C. their velocity increases and they fall with different velocity on the earth
   D. their velocity increases and they fall with same velocity on the earth

   Submitted by: Abid Hussain

10. The thermosphere extends from an altitude of ________ to the base of ________ at ________?

    A. 75 km, Mesosphere, 670 km
    B. 80 km, Ionosphere, 680 km
    C. 85 km, Exosphere, 690 km
    D. 90 km, Ozone Layer , 690 km

    Submitted by: Muhammad Abdullah