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10 th [x] Sample papers for Summative Assessment – 1  [links]             Mathematics Science Social Science English, Hindi and Sanskrit 10 th [x] Sample papers for Summative Assessment – 2 [links] Mathematics Science Social Science English, Hindi and Sanskrit

Oxidation and reduction reactions These are reactions where electrons are transferred from one species (atom, molecule or ion) to another. We can write 'half' equations to show only what happens to the species losing electrons or a different 'half' equation to show the species gaining electrons. The whole equation is put together by making sure that the numbers of electrons are balanced in each half equation and adding them together (when the electrons will cancel out) Oxidation is a chemical process in which there is a loss of electrons. The species, which gets oxidized becomes more positive or less negative, e.g., Na   →   Na +   + e -   (Na is oxidized to Na +   ) Fe 2+   →   Fe 3+   + e -   (Fe 2+   is oxidized to Fe 3+ ) Reduction is a chemical process in which there is a gain of electrons. The species, which gets reduced becomes more negative or less positive, e.g., Cl 2   + 2e -   →   2Cl -   (Cl 2   is reduced to Cl - ) S + 2e -

Rational Numbers test paper for class 08 Mathematics. These test papers include all main concepts of the chapter in CBSE class 08 Mathematics. It is very useful for testing and commanding over the topic and to excel in various Olympiads and other competitions  Introduction  Properties of Rational Numbers  Representation of Rational Numbers on the Number line.  Rational Numbers between two rational numbers. Learning Objectives:  The students learn to represent rational numbers on the number line. They learn to verify various properties taking different values. 8th maths Rational Number CBSE Test Paper - 01 8th maths Rational Number CBSE Test Paper - 02 8th maths Rational Number CBSE Test Paper - 03 8th maths Rational Number CBSE Test Paper - 04 8th maths Rational Number CBSE Test Paper - 05 Download Files 8th maths Rational Number CBSE Worksheet - 01 8th maths Rational Number CBSE Worksheet - 02 8th maths Rational Number CBSE Worksheet - 03 8th maths Rational

CHEMISTRY  Paper & Solution  Code : 55/3  Time : 3 Hrs. Max. Marks : 70  General Instructions :  (i) All questions are compulsory. (ii) Questions number 1 to 8 are very short answer questions and carry 1 mark each. (iii) Questions 9 to 18 are short answer questions and carry 2 marks each. (iv) Question number 19 to 27 are also short-answer questions and carry 3 marks each. ) Question number 28 to 30 are long-answer questions and carry 5 marks each. (vi) Use Log Tables, if necessary. Use of calculators is not allowed Solve Chemistry Question Paper 2014 CBSE Board Class XII               Download File Physics Paper & Solution Code : 55/3  Time : 3 Hrs. Max. Marks : 70  General Instruction :   (i) All questions are compulsory.   (ii) There are 30 questions in total. Questions 1 to 8 are very short answer type questions and carry one mark  each.   (iii) Questions 9 to 18 carry two marks each, questions 19 to 27 carry three marks each and question