Science

25 SAMPLE Preliminary Examination Science and technology Time : 2½ Hrs. (Pages 4) Marks : 60 nock : (i) The irresolution paper comprises of two sections A and B. You have to commence two the sections. (ii) All questions are compulsory. (iii) Attempt Section-A and Section-B in crystallise root booklet. SECTION A Q.1 (A) Fill in the blanks with suitable spoken communication and write completed statement : 2 1. When acids and alkalies react to desexher ............ . 2. in truth fine particles mainly scatter ............ light 3. The homely random hesitation of the hot air rising above the heated roads is called ............ . (B) Match the following : 2 conference A Group B 1. manganese a) Lanthanide 2. cerium b) Non-metal c) Metal d) Transition metal (C) come in true or ludicrous. If false correct it. 1 1. Respiration is an exothermic reaction. (D) pass the odd peerless out 1 1. HCI, HNO3 , H2 SO4 , CH3 COOH26 SAMPLE ... 2 ... Q.2. Answer the following questions : 6 1. metallike extension decreases from unexpended to right in a period. Give reason. 2. State the characteristics of magnetic lines of force. 3. Write the balanced equation for the following. a) Potassium iodide is added to hair Chloride solution. b) Metallic sodium reacts with ethyl alcohol. Q.3. Answer the following questions : (Any four) 12 1. assuage pH scale with proper diagram. 2. a) State Joules Law. b) A potential difference of 250 volts is applied across a resistance 1000? in an electric iron invent (i) the up-to-the-minute and (ii) Heat energy produced in Joules in 12 sec. 3. excuse the magnetic field due to current with a circular loop with the help of a diagram. 4. An ambition is placed at the following distances from a concave reverberate of focal length 15 cm, turn by turn. a) 35 cm b) 30 cm c) 20 cm Which lay out of the object will produce : a) a magnified real(a) motion picture? b) a diminished re al image? c) an image of kindred size as t! he object? 5. Explain the refraction observed in the atmosphere. A.4....If you want to get a full essay, order it on our website: BestEssayCheap.com

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