Chemistry · JEE

Important Questions: Some Basic Concepts in Chemistry for JEE

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The most important Some Basic Concepts in Chemistry questions for JEE cover conceptual traps, standard results, and numerical patterns from Matter and its nature, Dalton's atomic theory, Concept of atom, molecule, element and compound, Laws of chemical combination, Atomic and molecular masses, Mole concept, molar mass, percentage composition, empirical and molecular formulae, and more. Goodmarks provides 160+ high-yield MCQs with full solutions.

Focus on what matters most. These important Some Basic Concepts in Chemistry questions cover high-weightage concepts from Matter and its nature, Dalton's atomic theory, Concept of atom, molecule, element and compound, Laws of chemical combination, Atomic and molecular masses, Mole concept, molar mass, percentage composition, empirical and molecular formulae, and more — the topics JEE repeats every year.

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Subtopics in Some Basic Concepts in Chemistry

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Q1ChemistryUnit 1: Some Basic Concepts in Chemistry

What is molecular formula of oleum?

Q2ChemistryUnit 1: Some Basic Concepts in Chemistry

The volume of 0.5 moles of a gas at 273

\mathrm{K}

and

380 \mathrm{mm}

pressure is:

Q3ChemistryUnit 1: Some Basic Concepts in Chemistry

Who proposed that equal volumes of gases at the same temperature and pressure have same number of molecules.

Q4ChemistryUnit 1: Some Basic Concepts in Chemistry

Matter consist of particles such as

Q5ChemistryUnit 1: Some Basic Concepts in Chemistry

The name hydrogen was proposed by

Q6ChemistryUnit 1: Some Basic Concepts in Chemistry

Volume of

N_{2},

in litres, liberated on heating 6.4 g of

N H_{4} N O_{2}

is:

Q7ChemistryUnit 1: Some Basic Concepts in Chemistry

On dividing 0.46 by

15.374,

the actual answer is

0.02992 .

The correctly reported answer will be:

Q8ChemistryUnit 1: Some Basic Concepts in Chemistry

Equation for the following reaction.

\boldsymbol{C u}+\boldsymbol{x} \boldsymbol{H} \boldsymbol{N} \boldsymbol{O}_{3} \rightarrow \boldsymbol{C u}\left(\boldsymbol{N} \boldsymbol{O}_{3}\right)_{2}+

2 H_{2} O+2 N O_{y}

Find the value of

x

and

y

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Frequently asked questions

What makes a Some Basic Concepts in Chemistry question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Some Basic Concepts in Chemistry are high-weightage?

Key areas include Matter and its nature, Dalton's atomic theory, Concept of atom, molecule, element and compound, Laws of chemical combination, Atomic and molecular masses, Mole concept, molar mass, percentage composition, empirical and molecular formulae, and more. Prioritise these before moving to edge cases.

How many important questions should I revise?

Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

Can I practise only important questions on Goodmarks?

Pro users can filter by unit and subtopic to target high-yield areas. Free users can attempt sample questions on this page.