Question

Which of the following processes can not take place in the absence of oxygen?

• A. Combustion
• B. Displacement
• C. Combination
• D. All of the above

Answer 1

Answer: (A)

Combustion requires oxygen as a prime reagent.

In displacement reaction, one element displaces a less reactive element from the compound. It does not require oxygen for the reaction to take place.

In combination reaction, two or more reactants combine to form a single product. It too can take place without oxygen.

So, the correct option is A.