ماحولیاتی کیمیا: پانی

Written by Dr. Ayesha Nadeem (Chemistry)

دسویں جماعت · کیمیا · 9 سوالات

نام: ____________________   تاریخ: ____________

1. Hard water contains dissolved salts of:

   • A Calcium and magnesium
   • B Sodium
   • C Hydrogen
   • D Potassium only

2. Temporary hardness is removed by:

   • A Filtering
   • B Freezing
   • C Boiling
   • D Adding salt

3. Which of these is a water pollutant?

   • A Nitrogen
   • B Sewage
   • C Hydrogen
   • D Oxygen

4. Chlorine is added to drinking water to:

   • A Make it hard
   • B Add taste only
   • C Add colour
   • D Kill germs

5. Soap does not lather easily in:

   • A Distilled water
   • B Soft water
   • C Rain water
   • D Hard water

6. Water is a good solvent because it is:

   • A Polar
   • B Non polar
   • C A metal
   • D A gas

7. The process of removing salt from sea water is:

   • A Desalination
   • B Evaporation only
   • C Sedimentation
   • D Filtration

8. Ion exchange can be used to:

   • A Soften hard water
   • B Make water hard
   • C Add oxygen
   • D Add colour

9. Waterborne diseases such as cholera are caused by:

   • A Sunlight
   • B Contaminated water
   • C Pure water
   • D Cold weather