एनसीईआरटी, श्री अरबिंदो मार्ग, नई दिल्ली-110016 dceta [dot]ncert [at]nic [dot]in

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This textbook of Science for Class X is a continuation of our attempt in the Class IX Science textbook to comply with the guidelines of the National Curriculum Framework-2005.

Science 1.Food: Where Does It Come From? 2.Components of Food 3.Fibre to Fabric 4.Sorting Materials and Groups 5.Separation of Substances 6.Changes Around Us 7.Getting to Know Plants …

(We know that an electron possesses a negative charge of 1.6 × 10–19 C.) The electric current is expressed by a unit called ampere (A), named after the French scientist, Andre-Marie Ampere …

(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (iii) and (iv) 10. Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly …

In Class IX, we learnt about the combining capacity of various elements and how it depends on the number of valence electrons. Let us now look at the electronic configuration of carbon.

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10 Living Creatures: Exploring their Characteristics is not even moving could be a body part of a living snail. The teacher i Activity 10.1: Let us record

Recall the law of conservation of mass that you studied in Class IX; mass can neither be created nor destroyed in a chemical reaction. That is, the total mass of the elements present in the products of a …