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Science For Tenth Class


1.              Write the product formed when Ferrous Sulphate is heated? 


2.              What is the relationship between angle of Incidence & angle of Reflection?


3.              What will happen if the solution Hydrogen Carbonate is heated? Give the equation of the reaction involved?


4.              How can Presbyopia be corrected?


5.              What is the Composition of Aqua regia?


6.              Why are copper wire used as connecting wire?


7.              An element X on burring in air form an oxide Xo2 which when dissolved in water turns blue litmus red. Identify if X is a metal or non – metal Justify your answer?


8.              What is the cause of resistance offered by a conductor?


9.              The near point of a hypermetropic eye is 1m. What is the power of the lens required to correct               this defect? Assume that the near point of normal eye is 25cm.


10.              What are the two methods of producing magnetic field? Which of these is better and why?


11.              Classify the element of third period into metal & non – metal of the modern periodic table?



  1.               What do you mean by scattering of light? Describe the arrangement for

                    observing scattering of light by colloidal solution. 


13.              A metal X acquires a green colour coating on its surface an exposure to air


              (a) Identify the metal X and name the process responsible for this change


              (b) Name the green coating formed on the metal?


14.              A potential difference venist across a conductor of length L & cross section area A how is the resistance R of conductor affected when only V is halved only L is halved and only A is halved?


15.              Describe an experiment in detail to study refraction of light through a prism Draw with a ray diagram too. What do you mean by angle of deviation?


OR


              Describe an experiment to study refraction of a light ray through a rectangular glass slab what are the important result obtained from the experiment?


16.              The reaction metal X and Fe2 O3 is highly exothermic and is used to join railway


              (a) Identify metal X and name the reaction


              (b) Write the chemical equation of its reaction with fe2 O3


OR


              An organic Compound A is widely used as a puesentative in pickles and has a molecular formula C2 H2 O2. This compound reacts with ethanol to form a sweet smelling Compound B


              (a) Identify the Compound A


              (b) Write the chemical equation with ethanol to from compound B


              (c) How can we get compound A back from B


(d) Name the process and write equations?


              (e) Which gas is produced when compound A reacts with washing Soda? Write     the chemical equations? 


 


 


 


SECTION B


17.              When bile is stored?


18.              Name the plant hormone which in habits growths?


19.              What is genetic drift?


20.              What contribution forest officer Sh,. A.K. Banerjee made in protection of environment?


21.              What is the function of recepters & effector organ?


22.              What is blood pressure? What is the value in a healthy person name the instrument used to measure it?


23.              How information passes through neurons?


24.              How do we know how old fossils are?


25.              What is meant by pollination? Describe its various types a long with name of various pollination agents?




26.              Draw a diagram of Human Brain?


27.              [i] what is meant by pollination? Name its various types of pollination agents?


(ii)Labeled the diagram given, and explain how exchange of gases occurs in leaf of a plant.


              (iii)Draw cross- section of human heart; label it arrow path of circulation by arrows only.                                                                     


OR


              Describe the working of artificial Kidney?


 



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