1. Read the following statements :

(i) Non metals are good conduction of electricity

(ii) Graphite is a non-metal and good conduction of electricity.

2. perpendicular force acting per unit area is called

3. Rolling friction and sliding friction are two types of –

4. To walk on slippery ground is difficult because of the –

5. Ultra sound has frequency of vibration

6. The force required to overcome friction at the instant and object start moving from rest is measure of –

7. Some force produces more pressure on –

8. What does air resistance do to facing objects –

9. Friction offered by watch is good for the

10. The repatation of sound caused by the reflection of sound weaves is called –

11. An example where physical & chemical changes occur simultaneously is

12. Water and benzene can be separated by

13. The idea of stationary orbits was given by

14. When 100g CaCO₃ is heated, it gives

15. Which of the following metals cannot produce H₂ gas when treated with Hcl?

16. Which is the following is the anhydride of H₂SO₄?

17. Which of the following is crystalline allotrope of carbon?

18. The process by which hard water can be converted into soft water

9.

20.The formula of sodium zincate is

1. Na₂ ZnO₂
2. Na₃ ZnO₂
3. Na ZnO₂
4. Na₂ ZnO₃

21.Yellowish plasma of human blood contains water about _______ %

22. The instrument use to find out blood pressure is called –

23. Pulmonary vein carries –

24. which of following options having only dead cells –

25. ‘cutting and layering’ is a method of –

26. Which is the following is/are not a false fruit?

27. In a germinating seed, ________ is act as future shop.

28. The natural way of fixing thembryo in the uterine wall after 7 days of fertilization is known as –

29. Pictures/diagrams that shown in below is example of –

30. Irrigation is required during

31.

32.

33. If one number of pythagoreous triplet is 6 then the triplet is –

34. 3 persons can paint a house in 8 days, then 4 person can paint the same house in –

35.

36. The some of the digit of two digit number in 12, if 18 is added to it, then the digit is reversed, then the number is –

37.

38.

39.

40. If the area of a Rhombus is 90cm, and the length of one diagonal is 10cm, then the length of other diagonal is –