Start learning →

Water is split by electricity into hydrogen and oxygen. This is a

Asynthesis reaction
Bdecomposition reaction
Cphysical change only
Dcombustion reaction
Answer & Solution
Correct answer: B. decomposition reaction
A compound breaking down into simpler substances is decomposition, the opposite of synthesis.
Practise this question with Quill — Olympiad (Class 7) →

Keep practising Physical and chemical changes

Browse all Physical and chemical changes questions for Olympiad (Class 7), or explore more Science topics.

Start a Physical and chemical changes lesson →
Related questions