Question

Which pure substance can be classified as an element? H2 NO3 NaCl H2SO4

Answer 1

Answer ⇒ None of the above.

Reason/Explanation ⇒

→ The Pure substances are those substances or materials which are made up of the same kind of the atoms. They are further divided into compounds and elements.

→ Elements are those pure substances whose properties cannot be changed by any known physical or chemical method.

→ Compounds are those pure substances whose properties depends upon their compositions and they are made up of the atoms from different elements.

Now from the given examples H₂, NO₃, NaCl, H₂SO₄

All these compounds except H₂ cannot be considered as elements .

H₂ itself is the molecular form of hydrogen which is also a compound and not a element. thus there is no correct option given here .

Hope it Helps :-)

Answer 2

Answer:H2

Explanation: