Relevance of Gandhian Principles in Todays World

CBSE SAMPLE QUESTION PAPER (THEORY)
(Solved with Marking Scheme)
[Released by C.B.S.E., New Delhi in July, 2010 for First Term (SA-1) to be held during the Academic Year 2010-11]
Time: 3 to 31/2 hours Maximum Marks : 80

Instructions : 1. The question paper comprises of two sections, A and B, you are to attempt both the sections. 2. All questions are compulsory. 3. There is no overall choice. However internal choice has been provided in all the three questions of five marks category. Only one option in each question is to be attempted.. 4. All questions of Section A and all questions of Section B are to be attempted separately. 5. Question numbers 1 to 4 in Section A are one mark question. These are to be answered in one word or one sentence. 6. Question numbers 5 to 13 are two marks questions, to be answered in about 30 words. 7. Question numbers 14 to 22 are three marks questions, to be answered in about 50 words. 8. Question numbers 23 to 25 are five mark questions, to be answered in about 70 words. 9. Question numbers 26 to 41 in section B are multiple choice questions based on practical skills. Each question is a one mark question. You are to choose one most appropriate response out of the four provided to you.

1. Write a balanced chemical equation to represent the following reaction : Iron reacts with steam to form Iron (II, III) oxide and hydrogen gas. Ans. 3Fe + 4H2O → Fe3O4 + 4H2 [1] 2. Surface of some metals lose their brightness when kept in air for a long time. Why? Ans. They react with constituents of air (oxygen, carbon dioxide, moisture, etc.) to form compounds. [1] 3. Mention one feature of biogas that makes it an ideal fuel Ans. It burns without smoke/ leaves no residue / has high calorific value (any one). [1] 4. State and define the unit of current. Ans. Ampere [ 1/ 2] 1 ampere is the amount of current flowing when a charge of 1 coulomb flows through a conductor in 1 second. [ 1 / 2] 5. The atomic number of sodium is 11, fluorine is 9 and...