NCERT Solutions Class 10 Social Science (Hindi Medium)

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Remaining questions are of short answer type. These sample papers help you to increase speed and confidence. Remaining questions are of short answer type.

Answer Energy is required to support life. Question 1: Why does the colour of copper sulphate solution change when an iron nail is dipped in it? Non — biodegradable wastes cause: i water pollution so that water becomes unfit for drinking.

NCERT Solutions Class 10 Science Free PDF Download

These can be short or long answer type questions, multiple choice type questions or fill-in-the-blanks questions. Students must try to get appropriate answers to all these questions as it will help to get a thorough understanding of each topic and gain confidence to solve other related problems in the examinations. All these solutions have been prepared by the subject matter experts and will help you clear your concepts. Why is diffusion insufficient to meet the oxygen requirements of Multicellular organisms like humans. Sol: The size of the multi cellular organism is very much large as compared to unicellular one. Diffusion is a passive mode of transport and can transfer gases up to a very small distance only. This mode will not be sufficient for multi cellular organism needs. What are outside raw materials used by an organism. Sol: Minerals, water and gases like carbon dioxide and oxygen are the outside raw materials used by an organism. How is the small intestine designed to absorb digested food. Small intestine is especially adapted for absorbing the digested food. The inner surface of the small intestine has millions of tiny finger like projections called villi. The presence of villi gives the inner walls of the small intestine a very large ncert solution class 10th science area. This large surface area helps in the rapid absorption of digested ncert solution class 10th science. What are the components of the transport system in highly organized plants. The plant transport system in highly organized plants contains the following — Xylem — To transport water and minerals from roots to the other parts of the plant Phloem — To transport food and hormones from leaves to the other parts of the plant Q. How is the amount of urine produced regulated. The kidney has a mechanism to reabsorb water from the filtrate. This depends on how much water is left in the body and in the filtrate. The comparative concentration of the water gives a signal to the brain which then takes the required corrective action of either reabsorbing water or releasing it. This will help you understand the problem discussed in a question and then come with an appropriate answer.

Ohm's law; Resistance, Resistivity, Factors on which the resistance of a conductor depends. Chapter 12 - Electricity There are eighteen questions in the chapter. Using suitable chemical reaction, differentiate between a skeletal chemical equation and a balanced chemical equation. Answer Iron articles are painted because it prevents them from rusting. Answer The convex lens will form complete image of an object, even if its one half is covered with black paper. This point is known as the principal focus of the concave mirror. What is the principle behind use of condoms?