allery Start learning →

An atom of a free uncombined element has an oxidation number of:

AOne

BFour

CNine

DZero

Answer & Solution

Correct answer: D. Zero

1. Hydrogen gas and ozone are examples. 2. So are sodium, magnesium and sulphur. 3. The oxidation number is zero. _Source: syllabus Chemistry, Unit 7 'Redox Reactions'_

Practise this question with Quill — NEET UG →

Keep practising Redox & Electrochemistry

Browse all Redox & Electrochemistry questions for NEET UG, or explore more Chemistry topics.

Start a Redox & Electrochemistry lesson →

Related questions

Pick the right answer, quickly Spot the one that does not fit Order the working of an oxidation number Fill the gaps on oxidation numbers Sort each reaction by its type True or false about redox reactions Match each species to its oxidation number Oxidation or reduction?