1. Amount of substance is
2. Assertion : The seconds hand of a clock is having least count of one second. Reason : Least count is the maximum measurement that can be measured accurately by an instrument.
3. ……………. is a physical quantity that expresses the degree of hotness or coldness of a substance.
4. The value of the atmospheric pressure at sea level is –
5. The wear and tear in the machine part is due to …………….
6. The total force exerted by a body normal to the surface is called …………….
7. The centre of a sphere of which the reflecting surface of a spherical mirror is a part is called –
8. The imaginary line passing through the centre of curvature and pole of a spherical mirror is called –
9. If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
10. The velocity of light in vacuum is 3 x 108 ms-1 and in glass is 2 x 108 ms-1. The refractive index of glass is .
11. If you apply some heat energy to a substance, which of the following can take place in it?
12. Assertion : Radiation is a form of heat transfer which takes place even in vacuum. Reason : The thermal energy is transferred from one part of a substance to another part without the actual movement of the atoms or molecules.
13. Which of the following is not a scale of temperature?
14. Substances which allow heat to pass through them are called …………….
15. An electroscope has been charged by induction with the help of charged glassrod. The charge on the electroscope is –
16. The value of charge of an electron is equal to ……………….
17. The material which does not allow electric current is called ………………..
18. Most common industrial application of chemical effects of electric current is ………………..
19. Which of the following are the characteristics of vibrations? (i) Frequency (ii) Time period (iii) Pitch (iv) Loudness
20. ……………….. instruments produce a specific sound when they are struck, scrapped or clashed
21. One of the following is an example for a permanent magnet.
22. The south pole of a bar magnet and the north pole of a U-shaped magnet will ……………….
23. Who laid the foundation for magnetism and suggested that the Earth has a giant bar magnet?
24. __________is the ore of iron which is the strongest natural magnet.
25. Chandrayaan -1 was launched on …………….
26. Which of the following is the working principle of Rockets?
27. Liquid hydrogen, hydrazine and ……………. are the liquid fuels.
28. To provide information about the future possibility of life and past existence of life on the planet. This is one the objectives of …………….
29. Which one of the element name not derived from planet?
30. The metal which is stored in kerosene
31. The metal which can be cut with a knife
32. Brine is a concentrated solution of ………………
33. In Haber’s process of producing ammonia is used as a catalyst.
34. Dissolved gases like sulphur dioxide, nitrogen oxides in rain water causes
35. Solvay process is a method to manufacture –
36. Venus atmosphere consists of roughly 96 – 97% of …………….
37. Lighter metals like Na, K combine with CO2 to form corresponding …………….
38. The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of
39. ……………. is a prokaryotic micro organisms.
40. Assertion : Malaria is caused by Protozoa. Reason : The disease is transmitted by mosquito.
41. Floridean starch is a reserve food material of …………….
42. Assertion (A): Bryophytes are called Amphibians of the plant kingdom. Reason (R) : Bryophytes are land plants but they need water for the completion of their life cycle.
43. …………… is used in space travel.
44. The erythrocyte is placed in ……………… solution which has lesser concentration of solutes and greater concentration of water than in the cytoplasm.
45. ____________is not an example of diffusion.
46. The wrist bones are examples of ……………….. joint.
47. Chipko Movement was started in ……………
48. Each year …………… is celebrated as ‘World Biodiversity Day’.
49. Yeoman Butterfly has been declared as state butterfly of ……………
50. ICSH refers to ………………..
