Section-A : 1. After burning magnesium ribbon, white powder is formed. A student mix it with water and tested its nature with red litmus paper. Write your observation
2. The pH of acidic substance is lie between: a) 1 to 7 b) 0 to 6 c) 0 or More than 0 but below 7 d) More than 7
3. A student put few drops of hydrochloric acid to sodium carbonate powder. A gas is evolved with effervescence .What happen if this gas is passed through lime water. Or What is neutralisation reaction? Is it easy to perform this reaction to get neutral compound?
4. What is involuntary action? Which part of the brain generally controls these movements?
5. Silver chloride turns grey in sunlight to form: a) silver meta l b) chlorine gas c) silver oxide d) none of these
6. The synthetic indicator that give pink colour in basic nature compound is: a) Turmeric Paper b) Methyl Orange c) Phenolphthalein d) pH Paper
7. When sodium sulphate solution mixed with barium chloride solution it form a white precipitate. a. Which type of reaction involved in its formation? b. Name the compound that gives white colour in this reaction.
8. Which component of the blood helps in prevention of blood leakage in the body?
9. When copper is heated in a china dish its surface is coated with a : a) Blue b) Greenish c) Black d) Yellow
Or What are reducing agents?
10. What is the importance of transpiration for the plants?
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 labelled diagrams should be drawn.
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