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Science


Sample Paper – 2009


Class – X
Subject – Science


Time: 2 ½ Hrs                                                                                  Maximum Marks: 60


General Instructions:


 


I)              The question paper comprises of two sections A and B. You are to attempt both the sections.


ii)              The candidates are advised to attempt all the questions of Section A separately and Section B separately.


iii)              All questions are compulsory.


iv)              There is no overall choice. However, internal choice has been provided in two questions of five marks category in Section A and one question of 2 marks category and one question of 3 marks category in Section B. You are to attempt only one option in such questions.


v)              Marks allocated to each question are indicated against it.


vi)              Questions 1 to 6 in Section A and 17 to19 in Section B are very short answer questions. These are to be answered in one word or one sentence only.


vii)              Questions 7 to 10 in Section A and 20 to24 in Section B are short answer questions. These are to be answered in about 30 - 40 words each.


viii)              Questions 11 to 14 in Section A and 25 to 26 in Section B are also short answer questions. These are to be answered in about 40 - 50 words each.


ix)              Questions 15, 16 in Section A and 27 in Section B are long answer questions. These are to be answered in about 70 words each.


 


Section- A


             


1.              Name the scale on which the acidity or alkalinity can be measured qualitatively?


2.              What is the shape of eyeball?


3.              What is the composition of aqua regia?


4.              What is a commutate?


5.              If an element with atomic number X is an inert gas. In which group would you like to place an element with atomic number(x-1)?


6.              What is the direction of magnetic field at a given point?


7.              What does a balanced reaction convey to chemist?             


8.              The filament of an electric lamp which draw a current of 0.2A is used for 5 hours. Calculate the amount of charge following through the circuit?


9.              What kind of curves was plotted by lother meyer? Name 3 element that occur at peak in this curves?


10.              What is the composition of solar energy?


11.              What are the drawbacks for a chemical equation? Illustrate it with an example?


12.              An object 4.0cm in size is placed 25.0cm in front of a concave mirror should a screen be placed in order to obtain a shape image? Find the nature & size of the image?


13.              Write at least 5 uses of pH value in our digestive system?


14.              Write 4 important feature of the magnetic field due to a current carrying solenoid coil?


15.              Explain the mechanism of the cleansing action of soap?             


OR


              Give three method of extraction of metal available at the top of the activity series?


16.              Draw a label diagram of an electric motor? Explain its principle & working. What is the function of split ring in an electric motor?


OR


              What are the environmental consequences of the increasing demand for energy? What step would you suggest to reduce energy consumption?


             


SECTION B


 


17.              By which process root absorb water?


18.              What are meninges?


19.              What is meant by gestation?


20.              Give Reason of the following


              (i)              All organisms have many common features


              (ii)              Testes are located outside the abdominal cavity in a sac called scrotum?


21.              What are the functions of food that we eat?


22.              What is the composition of nerves system in higher vertebrate?


23.              What is the triple fusion in higher plant?


24.              Name the various theory of evolution proposed so far?


25.              Draw the diagram of Nephron?


26.              In Brief describe the various type of plant movement?


27.              What are the various evidences in favour of evolution?


OR


              Describe the causes of circulation of blood from heart to organs & back to heart?


 


 


 

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