Question

Which of the following is NOT a requirement for combustion to occur?

A. Fuel
B. Hydrogen
C. Heat
D. Oxygen

Answer 1

B ) Hydrogen

as O2 helps in combustion and Fuel is the one which is going to combust and heat is required to bring fuel to the combustion temperature

Answer 2

Which of the following is NOT a requirement for combustion to occur?

A. Fuel

B. Hydrogen

C. Heat

D. Oxygen

Answer:-
`\bold \pink{hydrogen}`

The four elements are oxygen for sustaining combustion, enough heat for raising the material to the ignition temperature, combustible material or fuel, and a subsequent exothermic chain reaction in the material.