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Chemistry · JEE

Important Questions: Concept of atom, molecule, element and compound for JEE

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The most important Concept of atom, molecule, element and compound questions for JEE cover conceptual traps, standard results, and numerical patterns from Concept of atom, molecule, element and compound. Goodmarks provides 8+ high-yield MCQs with full solutions.

Focus on what matters most. These important Concept of atom, molecule, element and compound questions cover high-weightage concepts from Concept of atom, molecule, element and compound — the topics JEE repeats every year.

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Q1ChemistryUnit 1: Some Basic Concepts in Chemistry
Assertion Element can form different compound. Reason Any substance that contains only one kind of an atom is known as an element.
Q2ChemistryUnit 1: Some Basic Concepts in Chemistry
What are the materials which contain at least two pure substances and show the properties of their constituents called?
Q3ChemistryUnit 1: Some Basic Concepts in Chemistry
4 protons, 5 neutrons, and 4 electrons are there in an atom of beryllium. Its mass number is:
Q4ChemistryUnit 1: Some Basic Concepts in Chemistry
What is the ratio of the number of neutrons present in potassium and magnesium atoms with mass number 39 and 24 respectively?
Q5ChemistryUnit 1: Some Basic Concepts in Chemistry
J J Thomson Model could not able to explain the following?
Q6ChemistryUnit 1: Some Basic Concepts in Chemistry
Who was the discoverer of neutrons???
Q7ChemistryUnit 1: Some Basic Concepts in Chemistry
Assertion The specific charge of canal rays is not constant. Reason The mass of ion varies with speed.
Q8ChemistryUnit 1: Some Basic Concepts in Chemistry
Protons and neutrons are also called

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Frequently asked questions

What makes a Concept of atom, molecule, element and compound 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 Concept of atom, molecule, element and compound. 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.

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