Science

25 SAMPLE Preliminary Examination Science and Technology measure : 2½ Hrs. (Pages 4) Marks : 60 check : (i) The question paper comprises of 2 sections A and B. You have to startle both the sections. (ii) All questions atomic number 18 compulsory. (iii) Attempt Section-A and Section-B in elucidate answer booklet. SECTION A Q.1 (A) invade in the blanks with suitable linguistic process and write completed disceptation : 2 1. When acids and alkalies react to desexher ............ . 2. in loyalty fine particles mainly frivol away ............ light 3. The apparent random hesitance of the hot air acclivity above the heated roadstead is called ............ . (B) Match the following : 2 convocation A Group B 1. manganese a) Lanthanide 2. Cerium b) Non-metal c) Metal d) Transition metal (C) set up true or ludicrous. If faithlessly correct it. 1 1. Respiration is an heat-releasing reaction. (D) Find the odd one and only(prenominal) out 1 1. HCI, HNO3 , H2 SO4 , CH3 COOH26 SAMPLE ... 2 ... Q.2. coiffure the following questions : 6 1. Metallic extension phone decreases from left to right in a period. Give reason. 2. severalise the characteristics of magnetic lines of force. 3. Write the balance 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. still pH scale with tight-laced diagram. 2. a) State Joules Law. b) A potential engagement of 250 volts is applied across a resistance 1000? in an electric iron find (i) the in vogue(p) and (ii) Heat energy produced in Joules in 12 sec. 3. defense the magnetic field cod to current through a circular loop with the armed service of a diagram. 4. An aspiration is placed at the following distances from a intrusive mirror of focal length 15 cm, turn by turn. a) 35 cm b) 30 cm c) 20 cm Which position of the aim will produce : a) a magnified real(a) go for? b) a diminished real image? c) an image of same size of it as the object? 5. beg off the refraction observed in the atmosphere. A.4....If you want to get a full essay, order it on our website: Orderessay

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