The molecular formula of water is
AHO2
BH2O
COH
DH2O2
Answer & Solution
Correct answer: B. H2O
1. Two hydrogen atoms combine with one oxygen atom to form water.
2. Writing element symbols with their counts gives H2O.
3. HO2 and OH are not the right formula.
4. H2O2 is hydrogen peroxide, a different compound.
_Source: Selina Concise Chemistry Class 9, Ch 4 The Language of Chemistry (Mistral OCR'd PDF), section on writing formulae_
Related questions
If the formula of a compound is M2O3 and oxygen has valency 2, then valency of M isWhich symbol denotes copper, from its Latin name Cuprum?An equation written with a double arrow indicates a reaction that isWhich state symbol in a chemical equation denotes a substance dissolved in water?Number of oxygen atoms in one molecule of potassium permanganate KMnO4 isMagnesium has valency 2; phosphate radical has valency 3. Formula of magnesium phosphate iMolecular mass of glucose C6H12O6 (C=12, H=1, O=16) isMolecular mass of H2SO4 (H=1, S=32, O=16) is