A. Hydrogen
B. Air
C. Oxygen
D. Argon
Submitted by: Mirza Musawer Jamil
Combustion can not take place without air. Air contains about 21% by volume of oxygen. Oxygen is essential for combustion to occur.
Related Mcqs:
- The planets visible to us without using a telescope are __________?
A. 3
B. 4
C. 5
D. 6 - The fruits without seed, like banana, are called_____________?
A. Seedless fruits
B. Parthenogenesis fruits
C. Parthenocarpic fruits
D. placental fruits
E. Organic fruits - A man can survive without food for atleast?
A. 1 month
B. 2 month
C. 3 month
D. 4 monthSubmitted by: Farjan Ahmed Soomro
- Name the animal which can live without water in its entire life?
A. Desert lizard
B. Camel
C. Kangaroo rat
D. CuttlefishSubmitted by: ABDUL HAYEE
- A man can survive without food for at least?
A. One month
B. Two month
C. Three month
D. Four monthSubmitted by: Ashfaque Ali Khoso
- The only living cells in the body without blood supply is___________?
A. Pupil
B. Nail
C. Cornea
D. HairSubmitted by: Mansoor Ahmed Suhag
- Animal without red blood cells is_________ ?
A. Frog
B. Earthworm
C. Snake
D. CrocodileSubmitted by: Haziq
- Which insect can survive without a head for one or more weeks?
A. Ladybird
B. Bee
C. Cockroach
D. TermiteSubmitted by: Kashif Ali Gaad
- At night, Plants intake __________ and release __________?
A. Oxygen – Carbon dioxide
B. Carbon dioxide – Oxygen
C. Oxygen – Carbon monoxide
D. None of theseCarbon monoxide – Oxygen - Electric motor was invented by __________ ?
A. Michael Faraday
B. Oliver Evans
C. Thomas Edison
D. Horace DaySubmitted by: Rashid Mehmood