IX Standard - 9th - Science - Second Midterm Test Question Paper - Samacheer Kalvi

 

                                                II Mid Term Test

Class :  IX STD                                                                    Marks:50

Subject  : SCIENCE                                                           Duration : 1.30Hrs

 

I. Choose the correct answer :                                                                 8x1=8

1.Heating effect of current is called,

   a) Joule heating                                       b) Coulomb heating              

   c)Voltage heating                                    d) Ampere heating

2.Transformer works on

    a) AC only         b) DC only   c) Both AC and DC             d) None of these

3.Number of valence electrons in carbon is  

     a) 2                    b) 4                    c) 3                                  d) 5

4.Acid turns blue litmus paper to__________

     a) Green              b) red                c)orange                  d) yellow

5.Bile helps in the digestion of __________

   a) proteins                   b) sugar         c) fats                d) carbohydrates

6.The structural and functional unit of kidney  is _________

    a) Villi                          b) Liver           c) Nephron         d) Ureter

7.The physician who discovered the scurvy can be cured by ingestion of citrus fruits is __________

     a) James lind                b)Louis Pasteur      c) Charles Darwin         d) Issac Newton

8.Food and Adulteration Act was enforced by government of India in the

year ________

     a) 1964                          b) 1954           c)1950                   d)1963

 

II. Answer any 6 of  the following questions :                            6x2=12

 9. Define magnetic flux density

10. State ohm’s law

11. Draw the electron distribution diagram for the formation of carbon di oxide     (co₂)

12. Write any 4 uses of acids.

13. Differentiate Absorption and Assimilation

14. Mention any two vital functions of human kidney

15. What is adulterant?

16. Name any two naturally occurring toxic substance in food

III. Answer any 4 of the following questions:                                    4x4=16

 

17.State the advantage of AC over DC

18.Find the oxidation number of the elements in following compound

   a) c in co₂   b)Mn in MnSO₄

19.a) What are the various uses of Aqua regia?

     b) What are the uses of plaster of Paris ?

 20.Write any one functions of the following minerals

   a) calcium b) sodium c) iron d) iodine

21.Name the types of teeth present in adult human being and mention the functions of each

23.Expalin any two methods of food preservation

 

IV.Answer all questions :                                                           7x2=14

23. a) Explain the principle, construction  and working of a dc motor

                                            (OR)

       b) Give tests to identify Acids and Bases

25.  a)Explain the role of food control agencies in india

                                   (or)

      b)  Explain the structure of Nephron