Which of the following is used in water purification?

Related Mcqs:

1. For water purification, we use?

   A. Chlorine
   B. Bromine
   C. Plants
   D. Young man

   Submitted by: Ashfaque Ali Khoso

2. 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

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. 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

5. 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

6. 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

7. 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

8. Which of the following flower is called Queen of Water?

   A. Rose
   B. Lilly
   C. Rafflesia
   D. Tulip

   Submitted by: Munwar Ali Sohu

9. Which of the following pollutants in water causes “Minamata disease?

   A. Methyl Mercury
   B. Lead
   C. Salmonella
   D. Perchlorate

   Submitted by: Malik Asghar Hussain

10. Which of the following organisms releases molecular oxygen into water?

    A. E.coli
    B. Phytoplankton
    C. Amoeba
    D. Salmonella

    Submitted by: Malik Asghar Hussain