Holy Mission School ,Laheriasrai , Darbhanga 2013
1. The power rating of an appliances is 100W -250W.What does it indicate. [1] 2. What is meant by tropic movement?[1] 3.Write the name of the substance whose vapor is used to run the turbine of the generator of ocean thermal energy?[1] 4. What happen when CO2 is bubbled through lime water (i)in small amount (ii) in excess [2] 5.Out of the two metal P and Q . P is less reactive than Q. Suggest an activity to arrange these metal in the order of their decreasing reactivity. Support your answer with suitable chemical equation?[2] 6.Draw a diagram to show the magnetic field line of the field produced by a current carrying circular loop. Indicate the point where the magnetic field will be strongest.[2] 7. The long electric cable carring current to the bulb donot glow ut filament of bulb glow.Justify this statement with reason?[2] 8. Complete and balance the equations[3] (i) Ca(OH)2 + Cl2 -à (ii) CaSO4 .1/2 H2O + H2O --à (iii) Na2CO3 .10H2O ---air----à 9. Balance these equations[3] a. MnO2 + HCL ---à MnCl2 + H2O + Cl2 b. BaCl2 + Al2(SO4)3 --------à BaSO4 + AlCl3 c. Fe+H2O --à Fe3O4 + H2 10. A compound P forms enamel of teeth. It is the hardest substance of the body .it does not dissolve in water but get corroded when PH lower below 5.5 (a) identify the compound “p”(b) How does it under go damage due to eating chocolate and sweet ? what should we do to prevent tooth decay? [3] 11. Account for the following (a) Fe is the most widely used metal is never used in its pure form.[3] (b) Na kept in kerosene oil (c) H2 is not evolved a metal react with nitric acids (except mg and Mn) 12. Resistance of t metal wire of length 1m is 26 ohm at 200C. If the diameter of wire is 0.3 mm,find the resistivity of the metal at this temperature? 13. Define frequency of AC. Mention the frequency and voltage of A.C In India . How many times current changes direction in one second in our domestic supply.[3] 14. Two conductors are made up of same material and have the same length .Conductor A is a solid wire of dimeter 2 mm. Conductor B is hollow tube of inner and outer dimeter 2 mm and 4mm. Calculate ratio of resistance of the solid wire to the hollow wire? [3] 15. (a) What is peristalatic movement? (b) “Stomata remain closed in desert plants during day time” how do they do photosynthesis?[3] Rest Questions are added soon For more paper SA-1 Visit EXAM SPECIAL by JSUNIL TUTORIAL CBSE BOARD Class X: Sample Question Papers for Term I (September ) CBSE BOARD Class X: Sample Question Papers for Term I (September ) CBSE BOARD Class IX: Sample Question Papers for Term I (September ) CBSE BOARD Class IX: Sample Question Papers for Term I (September ) CBSE BOARD Class X: Sample Question Papers for Term II (March ) CBSE BOARD Class X: Sample Question Papers for Term II (March ) CBSE BOARD Class IX: Sample Question Papers for Term II (March ) CBSE BOARD Class IX: Sample Question Papers for Term II (March )
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