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Class 10 Biology Ch 1 MCQ Class 10 Science – Biology Chapter 1: Life Processes (MCQs) Check Answers

NCERT Class 8 Maths Chapter 1: Rational Numbers - Explanation 1. What are Rational Numbers? A rational number is a number that can be expressed in the form p/q , where: p and q are integers. q ≠ 0 (denominator cannot be zero). Examples: 5, 5/1, 7/2 (All these are rational numbers.) 2. Properties of Rational Numbers Rational numbers follow several mathematical properties: (i) Closure Property Rational numbers are closed under addition, subtraction, and multiplication. Example: (which is also a rational number). 1/2 + 3/4 = 1 2/3 - 1/3 = 1/3 2/3 x 3/4 = 6/12 = 1/6 Not closed under division (as division by zero is not defined). 5 ÷ 3 = 2.666... (ii) Commutative Property Addition and multiplication of rational numbers are commutative . 2 + 3 = 3 + 2 2 x 3 = 3 x 2 (iii) Associative Property Addition and multiplication are associative . (2 + 3) + 4 = 2 + (3 + 4) (2 x 3) x 4 = 2 x (3 x 4) (iv) Distributive Property Multiplication distributes ove...

NCERT Class 7 Science - Chapter 1: Nutrition in Plants Introduction All living organisms require food for their survival. Plants are capable of making their own food, while animals depend on plants and other organisms for nutrition. This chapter explores the different modes of nutrition in plants and how they obtain essential nutrients. Modes of Nutrition in Plants Autotrophic Nutrition Plants prepare their own food through photosynthesis using sunlight, carbon dioxide, and water. Green plants that make their food are called autotrophs . Heterotrophic Nutrition Some plants depend on other organisms for food. Such plants are called heterotrophs . Photosynthesis: The Process of Food Making in Plants Photosynthesis is the process by which green plants make their own food using sunlight, water, and carbon dioxide. Raw Materials Required for Photosynthesis: Sunlight: Provides energy for the process. Chlorophyll: A green pigment in leaves that absorbs sunlight. Wa...

NCERT Class 9 Science - Chapter 1: Matter in Our Surroundings Introduction Everything in our surroundings is made up of matter. Matter is anything that has mass and occupies space. This chapter discusses the physical nature, characteristics, and states of matter, along with concepts like diffusion, evaporation, and interconversion of states. Physical Nature of Matter Matter is Made of Particles Matter is composed of small particles that are continuously moving. The particles of matter are extremely small and cannot be seen with the naked eye. Characteristics of Particles of Matter Particles have spaces between them: This property allows substances like salt or sugar to dissolve in water. Particles are continuously moving: This movement is called the kinetic energy of the particles. Particles attract each other: The force of attraction varies in different types of matter. States of Matter Matter exists in three main states: Solid State Definite shape and vo...