Which stone floats on water? - PakMcqs

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1. An egg sinks in soft water but floats in a concentrated solution of salt because?

   A. egg absorbs salt from the solution and expands B. albumin dissolves in salt solution and egg becomes lighter C. the density of salt solution exceeds the density of eggs D. water has high surface tension Submitted by: Malik Asghar Hussain...

2. The ‘stone’ formed in human kidney consist mostly of_____________?

   A. Calcium oxalate B. Sodium acetate C. Magnesium sulphate D. Calcium Submitted by: WIQAR AHMAD...

3. The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water.

   A. 1 gram B. 10 grams C. 1 kg D. 10 kg...

4. 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...

5. Why are soft drink made with chilled water rather than water at room temperature?

   A. Ingredients dissolve better in chilled water B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide  D. Chilled water is more hygienic Submitted by: Ashfaque Ali Khoso...

6. 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...

7. Sea water (Salt water) freezes at ?

   A. Same temperature as fresh water. B. Slightly higher temperatures than fresh water. C. Slightly higher temperature than fresh water. D. Sea water does not freeze Submitted by: Mansoor Ahmed Suhag...

8. Underground water and the water on the earth’s surface is called ?

   A. Mezosphere B. Ionosphere C. Hydrosphere D. None of these Submitted by: Haziq...

9. When sound waves travel from air to water which of the following quantities remains unchanged?

   A. Speed B. Frequency C. Intensity D. Wavelength Submitted by: Rashid Mehmood...

10. What is the percentage of salt water on earth surface?

    A. 93% B. 95% C. 97%  D. 76% Submitted by: Syed Nizakat Ali Shah...