Class X

Water in swimming pools is purified by adding
  1. sodium
  2. chlorine
  3. phosphorus
  4. potassium
Temporary hardness can be removed by adding
  1. lime
  2. carbon
  3. oxygen
  4. slaked lime
Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
  1. 2: 1
  2. 1: 2
  3. 3: 1
  4. 4: 1
Addition of washing soda removes
  1. softness of water
  2. temporary hardness of water
  3. permanent hardness of water
  4. hydrogen from water
Hard water can block radiators due to formation of
  1. insoluble calcium and magnesium salts
  2. insoluble sodium salts
  3. in soluble phosphate salts
  4. insoluble potassium salts
Time Elapsed

HR : MIN : SEC
Question Answered
0
Score out of 100
0

Get Started!

we provide the best
services to our students

AmazingCounters.com Views

 

LKG - 12th

Rs 1,999  Annual
Plan
TOP