X Standard - 10th - Science - First Midterm Question Paper - Samacheer Kalvi

 

FIRST MID TERM TEST

CLASS: X                                                                                                                TOTAL MARKS: 75

SUBJECT: SCIENCE                                                                                              TIME: 3.00 Hrs

I. Choose the correct answer                                                                                  12x1=12          

1. In which of the following sport the turning of effect of force used

a) swimming                      b) tennis                            c) cycling                             d) hockey

2.  The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is minimum in

a) A                        b) B                                        c) C                                         d) D

3. Power of a lens is –4D, then its focal length is

a) 4m                     b) –40m                               c) –0.25 m                                          d) –2.5 m

4. Mass of 1 mole of Nitrogen atom is

a) 28 amu            b) 14 amu                            c) 28 g                                                   d) 14 g

5.  ______ is an important metal to form amalgam.

 a) Ag                     b) Hg                                     c) Mg                                                     d) Al

6. _____ group contains the member of Chalcogen family.

 a) 17th                 b) 15th                                  c) 18th                                                  d) 16^th

7. The xylem and phloem arranged side by side on same radius is called _________

a) radial                                b) amphivasal                    c) conjoint                     d) None of these

8. Oxygen is produced at what point during photosynthesis ?

a) when ATP is converted to ADP             b) when CO2 is fixed     
c) when H2O is splitted                                  d) All of these

9. Mammals are ______________ animals.

a) Cold blooded                b) Warm blooded            c) Poikilothermic              d) All the above

10. Which is the correct sequence of blood flow

a) ventricle atrium vein arteries                                 b) atrium ventricle veins arteries

c) atrium ventricle arteries vein                                 d) ventricles vein atrium arteries

11. Which one of the following shows correct composition of blood

a) Plasma - Blood + Lymphocyte                                b) Serum - Blood + Fibrinogen

c) Lymph - Plasma + RBC + WBC                 d) Blood - Plasma + RBC+ WBC +Platelets

12. The outer most of the three cranial meninges is

(a) arachnoid membrane              (b) piamater             (c) duramater              (d) myelin sheath

II. Answer any seven questions (Q.No: 24 is compulsory)                                   7 x 2= 14                   

13. While catching a cricket ball the fielder lowers his hands backwards. Why?

14. State Rayleigh’s law of scattering.

15. Define: Relative atomic mass.

16. What is rust? Give the equation for formation of rust.

17. Draw and label the structure of oxysomes.

18. What is respiratory quotient?

19. Write the dental formula of rabbit.

20. Define diffusion.

 

21. What are the structures involved in the protection of brain?

22. Classify the following molecules based on their atomicity and fill in the table: Carbon dioxide (CO2), Phosphorous (P4), Sulphur (S8), Ammonia (NH3), Hydrogen iodide (HI), Sulphuric Acid (H2SO4), Methane (CH4), Glucose (C6H12O6),

 Molecule            Di - atomic                                Tri – atomic                                                    Poly - atomic            

Homo

Hetero

 

II. Answer any seven questions (Q.No: 32 is compulsory)                                   7 x 4= 28                   

23. State the universal law of gravitation and derive its mathematical expression.

24. List any five properties of light.

25. Explain about the methods of preventing corrosion.

26. Give the salient features of “Modern atomic theory”.

27. Differentiate Monocot root and Dicot root

28. List out the parasitic adaptations in leech.

29. What is transpiration? Give the importance of transpiration.

30. Differentiate Medullated and non-medullated nerve fibre.

31. Classify neurons based on its structure.

32. A person with myopia can see objects placed at a distance of 4m. If he wants to see objects at a distance of 20m, what should be the focal length and power of the concave lens he must wear?

IV. Answer all the questions                                                                                                 3  x 7 =21

33. a) i. Deduce the equation of a force using Newton’s second law of motion.(5m)

          ii. Differentiate mass and weight. (2m)

                                                                                                (OR)

 b) i. Differentiate the eye defects: Myopia and Hypermetropia. (4m)

     ii. Explain the rules for obtaining images formed by a convex lens with the help of ray diagram. (3m)

34.  a) i. Derive the relationship between Relative molecular mass and Vapour density.(5m)

          ii. Write the different types of isotopes of oxygen and its percentage abundance. (2m)

 

(OR)

b) i. Explain smelting process. (5m)

ii. A is a reddish brown metal, which combines with O₂ at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B and C with reaction.                                                                                                                                                                                               (2m)

35. Explain the male reproductive system of rabbit with a labelled diagram.

(OR)

     a) Tabulate Distribution of Antigen (RBC) and Antibody (Plasma) in different Blood Groups (4 m)

     b) Enumerate the functions of blood. (3 m)