Class VI

. Air present in 100cm3 of water is about
  1. 2cm3
  2. 3cm3
  3. 4cm3
  4. 5cm3
Mixture important for human life and combustion is
  1. carbon
  2. air
  3. zinc
  4. nitrogen
Exhaled air contains 16% oxygen and about 4% of carbon dioxide, rest of 80% is
  1. neon
  2. argon
  3. nitrogen
  4. none of them
Air is important on earth because it has necessary components essential for life of
  1. plants
  2. animals
  3. organism
  4. plants, animals and other organisms
A reaction in which oxygen is used up for production of thermal and light energy is known as
  1. production
  2. combustion
  3. reaction
  4. respiration
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