MPPSC MAINS 2021 Paper-III

Points to Remember: The question asks for the classification of Android, Fedora, Windows, and iOS. The answer requires factual knowledge about operating systems. Introduction: Android, Fedora, Windows, and iOS are all examples of operating systems (OS). An operating system is a software that manages computer hardware and software resources and provides common services for computer … Read more

Points to Remember: Basic unit of life Prokaryotic vs. Eukaryotic Organelles and their functions Cell membrane, cytoplasm, nucleus (in eukaryotes) Cell division and reproduction Introduction: The cell is the fundamental unit of life. All living organisms, from the smallest bacteria to the largest blue whale, are composed of cells. This basic building block exhibits remarkable … Read more

Points to Remember: Macronutrients (carbohydrates, proteins, fats), micronutrients (vitamins, minerals), water, and fiber. Their roles in bodily functions and sources. Introduction: Food is essential for human survival, providing the energy and nutrients necessary for growth, development, and maintaining bodily functions. The composition of food is complex, encompassing a variety of components that contribute to overall … Read more

Points to Remember: Absorption of water and minerals Anchorage and support Symbiotic relationships Secretion of substances Introduction: Root hairs are thin, tubular extensions of epidermal cells found on the roots of vascular plants. They significantly increase the surface area of the root system, dramatically enhancing the plant’s ability to absorb essential nutrients and water from … Read more

Points to Remember: Bleaching powder is a chemical compound used as a disinfectant and bleaching agent. Its chemical formula is crucial for understanding its properties and applications. The formula reveals the constituent elements and their proportions. Introduction: Bleaching powder, formally known as calcium hypochlorite, is a widely used chemical compound with significant applications in various … Read more

Points to Remember: The process of applying a protective zinc coating to steel or iron. Methods include hot-dip galvanizing and electrogalvanizing. Protects against corrosion and extends the lifespan of metal structures. Widely used in various industries due to its cost-effectiveness and durability. Introduction: Galvanization is a crucial metal surface treatment process that significantly enhances the … Read more

Points to Remember: Definition of Curie temperature. Factors affecting Curie temperature. Applications of Curie temperature. Materials exhibiting Curie temperature. Introduction: The Curie temperature (Tc), also known as the Curie point, is a critical temperature named after Pierre Curie, above which certain materials lose their permanent magnetic properties. Below the Curie temperature, these materials exhibit spontaneous … Read more

Points to Remember: Magnetic properties of materials Steel’s composition and its effect on magnetism Comparison with other materials used for magnets Applications of steel magnets Introduction: Permanent magnets are materials that retain their magnetic properties even after the external magnetic field is removed. Their ability to generate a persistent magnetic field stems from the alignment … Read more

Points to Remember: Types of chemical bonds (ionic, covalent, metallic) Factors influencing bond formation (electronegativity, valence electrons) Properties of substances based on bond type Bond strength and its implications Introduction: A chemical bond is the attractive force that holds atoms together in molecules, crystals, and other stable structures. Understanding chemical bonds is fundamental to chemistry, … Read more

Points to Remember: The audible range of human hearing is generally considered to be between 20 Hz and 20,000 Hz. The relationship between wavelength (λ), frequency (f), and speed (v) of a wave is given by: v = fλ. We need to calculate the frequency of the wave to determine if it falls within the … Read more