Exercise : Solutions of Questions on Page Number : 65 Q1 :(i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons. Answer : (i) Mass of one electron = 9.10939 × 10-31 kg Number of electrons that weigh 9.10939 × 10-31 kg = 1 Number of electrons that will weigh 1 g = (1 × 10-3 kg) = 0.1098 × 10-3 + 31 = 0.1098 × 1028 = 1.098 × 1027 (ii) Mass of one electron = 9.10939 × 10-31 kg Mass of one mole of electron…
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Subtopics of NCERT Solutions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry Importance of Chemistry Nature of Matter Properties of Matter and Their Measurement The International System of Units (SI) Mass and Weight Uncertainty in Measurement Scientific Notation Significant Figures Dimensional Analysis Laws of Chemical Combinations Law of Conservation Of Mass Law of Definite Proportions Law of Multiple Proportions Gay Lussac’s Law of Gaseous Volumes Avogadro’s Law Dalton’s Atomic Theory Atomic and Molecular Masses Atomic Mass Average Atomic Mass Molecular Mass Formula Mass Mole Concept and Molar Masses Percentage Composition Empirical Formula for Molecular Formula Stoichiometry and…
Rain on the Roof (Poem) Class 9 Before you read : Solutions of Questions on Page Number : 41 Q1 : When the sky is covered with dark clouds and it starts raining, have you ever listened to the patter of soft rain on the roof? What thoughts flashed through your mind as you heard this melody of nature? Read the poem to find out what the poet dreamed of while listening to the rain. Answer : Yes, I have often listened to the patter of the soft rain on the roof during the rainy season. This melody of nature…
*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 19. List of Subtopics Covered in Chapter 22 – Chemical Coordination and Integration Number Subtopic 22.1 Endocrine Glands and Hormones 22.2 Human Endocrine System 22.3 Hormones of Heart, Kidney and Gastrointestinal Tract 22.4 Mechanism of Hormone Action NCERT Solutions for Class 11 Biology Chapter 22 – Chemical Coordination and Integration Class 11 Biology Chapter 22 Chemical Coordination and Integration NCERT Solution is given below. Question 1: Define the following: (a) Exocrine gland (b) Endocrine gland (c) Hormone Answer Answer a) Exocrine glands: Glands that discharge secretions into…
*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 18. List of subtopics covered in Chapter 21 – Neural Control and Coordination: Number Subtopic 21.1 Neural System 21.2 Human Neural System 21.3 Neuron as Structural and Functional Unit of Neural System 21.4 Central Neural System 21.5 Reflex Action and Reflex Arc 21.6 Sensory Reception and Processing NCERT Solutions for Class 11 Biology Chapter 21 – Neural Control and Coordination Class 11 Biology Chapter 21 Neural Control and Coordination NCERT Solution is given below. Question 1: Briefly describe the structure of the following: (a) Brain (b) Eye…
*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 17. List of Subtopics Covered in Chapter 20 – Locomotion and Movement Number Subtopic 20.1 Types of Movement 20.2 Muscle 20.3 Skeletal System 20.4 Joints 20.5 Disorders of the Muscular and Skeletal System NCERT Solutions for Class 11 Biology Chapter 20 – Locomotion and Movement Class 11 Biology Chapter 20 Locomotion and Movement NCERT Solution is given below. Question 1: Draw the diagram of a sarcomere of skeletal muscle showing different regions. Answer: The diagrammatic representation of a sarcomere is as follows: Question 2:Define sliding filament theory…
*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 16. List of subtopics covered in Chapter 19 – Excretory Products and Their Elimination Number Subtopic 19.1 Human Excretory System 19.2 Urine Formation 19.3 Function of the Tubules 19.4 Mechanism of Concentration of the Filtrate 19.5 Regulation of Kidney Function 19.6 Micturition 19.7 Role of other Organs in Excretion 19.8 Disorders of the Excretory System NCERT Solutions for Class 11 Biology Chapter 19 – Excretory Products and Their Elimination Class 11th Biology Chapter 19 Excretory Products and their Elimination NCERT Solution is given below. Question 1: Define…
*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 15. List of subtopics covered in Chapter 18 – Body Fluids and Circulation Number Subtopic 18.1 Blood 18.2 Lymph (Tissue Fluid) 18.3 Circulatory Pathways 18.4 Double Circulation 18.5 Regulation of Cardiac Activity 18.6 Disorders of Circulatory System NCERT Solutions for Class 11 Biology Chapter 18 – Body Fluids and Circulation Class 11 Biology Chapter 18 Body Fluids and Circulation NCERT Solution is given below. Question 1: Name the components of the formed elements in the blood and mention one major function of each of them. Answer: The…
*According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 14. List of subtopics covered in Chapter 17 – Breathing and Exchange of Gases: Number Subtopic 17.1 Respiratory Organs 17.2 Mechanism of Breathing 17.3 Exchange of Gases 17.4 Transport of Gases 17.5 Regulation of Respiration 17.6 Disorders of Respiratory System NCERT Solutions for Class 11 Biology Chapter 17 – Breathing and Exchange of Gases Class 11th Biology Chapter 17 Breathing and Exchange of Gases NCERT Solution is given below. Question 1: Define vital capacity. What is its significance? Answer: Vital capacity is the maximum volume of air…
*According to the latest update on the CBSE Syllabus 2023-24, this chapter has been removed. List of Subtopics Covered in Chapter 16 – Digestion and Absorption Number Subtopic 16.1 Digestive System 16.2 Digestion of Food 16.3 Absorption of Digested Products 16.4 Disorders of Digestive System NCERT Solutions for Class 11 Biology Chapter 16 – Digestion and Absorption Class 11th Biology Chapter 16 Digestion and Absorption NCERT Solution is given below. Question 1: Choose the correct answer among the following: (a) Gastric juice contains (i) pepsin, lipase and rennin (ii) trypsin lipase and rennin (iii) trypsin, pepsin and lipase (iv) trypsin,…