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3. Atoms and Molecules Class 9 science Solutions English Medium-Additional -Questions
3. Atoms and Molecules Class 9 science Solutions English Medium-Additional -Questions Get chapter-wise detailed explanations, step-by-step answers, important questions and exam-ready study material in Hindi and English medium.
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3. Atoms and Molecules Class 9 science Solutions English Medium-Additional -Questions
NCERT Solutions for Class 9 are specially prepared according to the latest CBSE syllabus (2026-27) to help students understand every concept clearly. These solutions provide step-by-step explanations, accurate answers, and exam-oriented guidance for all chapters. Class 9 students can improve their problem-solving skills, strengthen conceptual understanding, and prepare confidently for school as well as board examinations. All questions are solved in a simple and easy-to-understand language for both Hindi and English medium learners.
3. Atoms and Molecules Class 9 science Solutions English Medium-Additional -Questions
NCERT Solutions Class 9 science English Medium
3. Atoms and Molecules
Topic: Additional -Questions
Chapter– 3 ATOMS AND MOLECULES
Additional And Important Questions with Solution:
Ques.1 – Who had found two important laws of chemical combination.
Ans. - Antoine L. Lavoisier .
Ques.2 – Write the name of two important laws of chemical combination which is found by Antoine L. Lavoisier.
Ans. – (i) Law of conservation of mass. (ii) Law of constant proportions.
Ques.3 – Write the law of conservation of mass.
Ans. - Mass can neither be created nor destroyed in a chemical reaction.
Ques.4 – Write the law of constant proportions.
Ans. - In a chemical substance the elements are always present in definite proportions by mass.
Ques.5 – Define atoms according to Dalton atomic theory.
Ans. – All matter, whether an element, a compound or a mixture is composed of small particles called atoms.
Ques.6 – Write the Dalton’s atomic theory.
Ans. – Dalton’s atomic theory as follow.
(i) All matter is made of very tiny particles called atoms.
(ii) Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.
(iii) Atoms of a given element are identical in mass and chemical properties.
(iv) Atoms of different elements have different masses and chemical properties.
(v) Atoms combine in the ratio of small whole numbers to form compounds.
(vi) The relative number and kinds of atoms are constant in a given compound.
Ques.7 - Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
Ans. – The second postulate of Dalton’s atomic theory is the result of the law of conservation of mass.
Ques.8 - Which postulate of Dalton’s atomic theory can explain the law of definite proportions?
Ans. – The forth postulate of Dalton’s atomic theory can explain the law of definite proportions.
Ques.9 – Define atomic mass.
Ans. – The sum of numbers of protons and neutrons presence in a nucleus of an atom is known as atomic mass.
Ques.10 – Define atomic number.
Ans. – The number of protons presence in a nucleus of an atom is known as atomic number.
Ques.11 – What is ion?
Ans. – The charged atom is known as ion.
Example – Na +, Mg+, Cl-.
Ques.12 – Write the differences between atom and ion.
Ans –
|
Atom |
Ions |
|
|
All Topics From 3. Atoms and Molecules
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1. Chapter Review 2. Text-book Questions 3. Additional -Questions 4. Additional -Questions 2 5. Additional -Questions 3NCERT Solutions Class 9 Hindi and English Medium – Complete Study Material
NCERT Solutions Class 9 students ke liye specially CBSE latest syllabus (2026-27) ke according prepare kiye gaye hain. Yeh solutions Hindi aur English medium dono ke liye available hain, jisse har student apni language preference ke hisaab se padh sakta hai. Har chapter ke sabhi prashnon ke step-by-step answers diye gaye hain jo concept clarity aur exam preparation me madad karte hain.
Chapter-Wise Detailed Explanations
Class 9 ke liye diye gaye Chapter Wise NCERT Solutions me har question ka detailed aur easy explanation diya gaya hai. Chahe aap CBSE Board Exam Preparation kar rahe ho ya school test ke liye revise kar rahe ho, yeh solutions aapko complete understanding denge. Har answer simple language me likha gaya hai jisse students concepts ko easily grasp kar saken.
Hindi and English Medium Support
Students Hindi aur English medium dono me NCERT Book Solutions Class 9 access kar sakte hain. Yeh dual language support un students ke liye helpful hai jo apni regional language me better samajhna chahte hain. Sabhi answers CBSE Latest Syllabus 2026-27 ke anusaar update kiye gaye hain.
Important Features of NCERT Solutions
- Class 9 NCERT Solutions PDF
- CBSE Class 9 Study Material
- NCERT Book Questions and Answers
- Exam Oriented Important Questions
- Step-by-Step Detailed Solutions
- Concept Clarity and Revision Notes
Why Students Should Use NCERT Solutions?
Aaj ke competitive environment me sirf textbook padhna kaafi nahi hota. NCERT Solutions for Class 9 students ko practice aur conceptual understanding dono provide karte hain. Yeh solutions unhe exam pattern samajhne, frequently asked questions practice karne aur high score achieve karne me madad karte hain. Regular practice se students apne weak topics ko improve kar sakte hain.
Best Resource for Exam Preparation
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