Mole Concept and Molarity
Understand the mole as a counting unit, Avogadro's number, and how to calculate molarity and related quantities for solutions and pure substances.
Why this shows up in the exam
You need to confidently convert between mass, moles, number of particles, and solution concentrations in exam problems.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
The amount of glucose required to prepare 250 mL of M/20 aqueous solution is (Molar mass of glucose : 180 g mol -1)
Push further
More challenging8 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
A solution is prepared by dissolving 4.9 g of sulfuric acid (H2SO4, molar mass = 98 g/mol) in enough water to make 250 mL of solution. What is the molarity of H+ ions in this solution?
More from Some Basic Concepts of Chemistry
Stoichiometry, Limiting Reagent, and Yield
Master stoichiometric calculations, identification of limiting reagents, and determination of percent yield and percentage purity in chemical reactions.
Stoichiometry of Gases and Molar Volume
Apply stoichiometric principles to reactions involving gases, using concepts like molar volume at STP and gas density calculations.
Units, Measurement, and Significant Figures
Learn how to measure physical quantities, use correct units, and apply significant figures and dimensional analysis in calculations.