Some Basic Concept of Chemistry Important Questions for NEET PDF

Some Basic Concept of Chemistry Important Questions for NEET : Chemistry is one of the most crucial subjects for NEET aspirants. Among its many topics, the "Some Basic Concept of Chemistry" is foundational. This topic helps students understand the fundamental principles of chemistry, which are essential for solving complex problems in the NEET exam . Questions from this topic often appear in both direct and applied forms, making it a key area to master.

For NEET 2025, focusing on this topic will not only strengthen your basics but also improve your ability to tackle related concepts in physical, organic, and inorganic chemistry. With a good understanding of this topic, students can save time during the exam and increase their overall score.

Also Check:

• Free Toppers Notes for NEET
• Free NEET Lectures by PW Experienced Faculties

Some Basic Concept of Chemistry Important Questions for NEET

The "Some Basic Concept of Chemistry" includes topics like the mole concept, stoichiometry, chemical equations, and atomic mass. These concepts are interconnected and frequently tested in NEET. The questions range from numerical problems to theoretical applications. Understanding these basics is essential for solving questions related to reaction mechanisms, thermodynamics, and chemical kinetics later in the syllabus.

Students should practice questions of varying difficulty levels to ensure they are well-prepared. Regular practice will also help in understanding the patterns of questions asked in NEET and improve accuracy.

PW Class 11, 12 and Dropper Courses for NEET – Join Now!

Some Basic Concept of Chemistry

The "Some Basic Concept of Chemistry" refers to the fundamental principles that form the backbone of the subject. This includes:

• Mole Concept: Understanding the amount of substance and its relation to mass and volume.
• Stoichiometry: The study of quantitative relationships in chemical reactions.
• Atomic Mass and Molecular Mass: Learning about the mass of atoms and molecules.
• Chemical Equations: Writing and balancing equations to represent chemical reactions.
• Laws of Chemical Combination: Laws like the law of conservation of mass and definite proportions.

NEET Study Material, Free Sample Papers, Book, Toppers Notes, PYQs

Practice Questions of Some Basic Concept of Chemistry for NEET

Practicing questions is the right way to master this topic. PW provides a set of questions of some basic concept of chemistry. These practice questions cover all key areas, including numerical problems and conceptual queries, ensuring comprehensive preparation. By solving these, students can test their understanding and identify areas for improvement.

Q1 Which of the following contains the highest number of molecules?

1. 2.8 g of CO
2. 3.2 g of CH₄
3. 1.7 g of NH₃
4. 3.2 g of SO₂

Q2 An element, X has the following isotopic composition:
²⁰⁰X : 90%, ¹⁹⁹X : 8.0%, ²⁰²X : 2.0%.
The weighted average atomic mass of the naturally occurring element X is closest to:

1. 201 amu
2. 202 amu
3. 199 amu
4. 200 amu

Q3 Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (At.wt. = 78.4). Then, minimum gram molecular weight of peroxidase anhydrous enzyme is:

1. 1.568 × 10⁴ g/mol
2. 1.568 × 10³ g/mol
3. 15.68 g/mol
4. 3.136 × 10⁴ g/mol

Q4 12 L of H₂ and 11.2 L of Cl₂ are mixed and exploded. The composition by volume of mixture is;

1.  24 L HCl(g)
2.  0.8 L Cl₂(g) and 20.8 L HCl(g)
3. 0.8 L H₂(g) and 22.4 L HCl(g)
4. 22.4 L HCl(g)

Q5 The total number of protons, electrons and neutrons in 12 g of ¹²C is:

1. 1.084 × 10²⁵
2.  6.022 × 10²³
3. 6.022 × 10²²
4. 18

Q6 How many molecules are present in one gram of hydrogen gas?

1. 6 × 10²³
2. 3 × 10²³
3. 2.5 × 10²³
4. 1.5 × 10²³

Q7 If 1/2 moles of oxygen (O₂) combine with aluminum to form 1/3 moles of Al₂O₃, then weight of aluminum metal used in the reaction is:
(Atomic mass of Al = 27 g/mol)
4Al(s) + 3O₂(g) → 2Al₂O₃(s)

1.  27 g
2.  18 g
3. 54 g
4. 40.5 g

Q8 Which of the following reactions is incorrect according to the law of conservation of mass?

1. 2 Mg(s) + O₂(g) → 2 MgO(s)
2. C₃H₈(g) + O₂(g) → CO₂(g) + H₂O(g)
3. P₄(s) + 5O₂(g) → P₄O₁₀(s)
4. CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

Q9 If the concentration of glucose (C₆H₁₂O₆) in blood is 0.9 g L⁻¹, what will be the molarity of glucose in blood?

1. 5 M
2. 50 M
3. 0.005 M
4. 0.5 M

Some Basic Concept of Chemistry Important Questions for NEET PDF

To make preparation easier, PW provides a PDF that includes important questions from "Some Basic Concept of Chemistry" along with detailed explanations and an answer key. This PDF is curated by experts and aligns with the NEET syllabus, ensuring that students get the practice material.