the?

[asad hussain]

Won't there be "the" before "reactions" in the following definitions?

"Combustion reactions are (the?) reactions that produce light and heat as energy products in addition to new chemical substances."

"Double replacement reactions are (the?)reactions in which the elements or ions of both reactants change partners to form two new products."

[Harry Smith]

Won't there be "the" before "reactions" in the following definitions?

"Combustion reactions are (the?) reactions that produce light and heat as energy products in addition to new chemical substances."

"Double replacement reactions are (the?)reactions in which the elements or ions of both reactants change partners to form two new products."

I think it's o.k without "the".

[BobK]

Won't there be "the" before "reactions" in the following definitions?

"Combustion reactions are (the?) reactions that produce light and heat as energy products in addition to new chemical substances."

"Double replacement reactions are (the?)reactions in which the elements or ions of both reactants change partners to form two new products."

I agree - OK without 'the'. In fact, they're more than just OK: 'reactions that produce light and heat as energy products in addition to new chemical substances' is a definition of 'combustion reactions'. If you need to use a determiner, use 'those': Combustion reactions are those reactions that produce light and heat as energy products in addition to new chemical substances.

b