1. Convert the following temperatures to the celsius scale. (a) 793 K (b) 870 K OR A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?
2. Arrange the following substances in increasing order of forces of attraction between the particles (a) water, (b) sugar, (c) oxygen
3. What are alloys? Give one example.
4. What is concentration of a solution?
5. Name the two organelles we have studied that contain their own genetic material.
6. Why are lysosomes known as suicide bags? OR Where do the lipids and proteins constituting the cell membrane get synthesised?
7. What are the functions of the stomata?
8. What is the specific function of the cardiac muscle?
9. How will you differentiate between speed and velocity? OR What is the difference between distance and displacement ?
10. Which of the following is true for displacement? (a) It cannot be zero. (b) Its magnitude is greater than the distance travelled by the object.
11. Explain law of inertia. OR If action is always equal to the reaction, explain how a horse can pull a cart.
12. What do you understand by momentum of an object? What is its SI unit ? OR In an isolated system (where there is no external force), what happens to the total momentum ?
13. What do you understand by organic farming ?
General Instructions: (i) The question paper comprises four sections A, B, C and D. There are 36 questions in the question paper. All questions are compulsory. (ii) Section–A – question no. 1 to 20 – all questions and parts thereof are of one mark each. These questions contain multiple choice questions (MCQs), very short answer questions and assertion – reason type questions. Answers to these should be given in one word or one sentence. (iii) Section–B – question no. 21 to 26 are short answer type questions, carrying 2 marks each. Answers to these questions should in the range of 30 to 50 words. (iv) Section–C – question no. 27 to 33 are short answer type questions, carrying 3 marks each. Answers to these questions should in the range of 50 to 80 words. (v) Section–D – question no. – 34 to 36 are long answer type questions carrying 5 marks each. Answer to these questions should be in the range of 80 to 120 words. (vi) There is no overall choice. However, internal choices have been provided in some questions. A student has to attempt only one of the alternatives in such questions. (vii) Wherever necessary, neat and properly labeled diagrams should be drawn.
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