Question

Which of the following is not a compound option a common salt option b water c helium d copper sulphate​

Answer 1

Answer:

Helium is not a compound it is a Inert Gas.....!!!!!

so c is the correct option   : )

Answer 2

Answer:

c) helium

Explanation:

Helium is molecule of an element. Others are all compounds as their constituent elements are in fixed ratio