Home

CBSE

NIOS

B.COM

B.A. (SOL)

GOVT. EXAM

Blog

Contact Us

Science
SCIENCE
(Question for Practice)

Q.1. Give an example of metal which:
(i) Is liquid at room temperature?
(ii) Can be easily cut with knife

Q.2. Give an example of a metal which:
(i) Is the best conductor of heat
(ii) Is a poorest conductor of heat

Q.3. Explain the meaning of malleable and ductile?

Q.4. What are amphoteric oxides?

Q.5. Give example of two amphoteric oxides?

Q.6. What is anodizing?

Q.7. What happens when metal react with water?

Q.8. What happens when metals react with dilute acid? Give one example.

Q.9. What is the reactivity series of metals?

Q.10. Why is sodium or potassium metals kept immersed in kerosene oil?

Q.11. Define minerals and ores?

Q.12. What is the basis of removal of the ore?

Q.13. What is roasting?

Q.14. What is calcination?

Q.15. What is an amalgam?

Q.16. Why are foodcans coated with tin metal and not zinc metal?

Q.17. State two ways to prevent the rusting of iron?

Q.18. What types of oxides are formed when non metals combine with oxygen?

Q.19. Differentiate between metals and non-metals on the basis of their physical properties?

Q.20. Explain the refining of impure copper metal?

Q.21. Write an activity to show that ionic compounds are good conductors of electric current in their aqueous solution?

Q.22. An incident ray makes an angle of 35 degree with the surface of plane mirror. What is the angle of reflection? 

Q.23. David is observing his image in a plane mirror. The distance between mirror and his image is 4m. If he moves 1m towards mirror then the distance between him and his image will be?

Q.24. If the radius of the curvature of a spherical mirror is 20cm, what is his focal length?

Q.25. We wish to obtain an erect image of an object using a concave mirror of focal length is 15cm. what is the nature of the image?

Q.26. Find the size, nature and position of an image formed when an object of size 1cm is placed at a distance which with give us the position of image?

Q.27. Find the size, nature and position of an image formed when an object of size 1cm is placed at a distance which with give us the position of image?

Q.28. A beam of light passes from air into substance X. If the angle of incidence be 72 degree and the angle of reflection is 40 degree. Calculate the reflective index of X. Sin 72= 0.951, Sin 40= 0.642? (2)

Q.29. Light enters from air into a glass plate having refractive index 1.50. What is the speed of light in glass? (Speed of light in vacuum= 3x10-8)

Q.30. Convex lens is of focal length 10cm. What is its power?
Q.31. Define Accommodation?

Q.32. What happens to the image distance in the eye when we increase the distance of an object from an eye?

Q.33. Give the 3 defects of eye and explain any one?

Q.34. The far point of myopic person is 80cm in front of the eyes. What is the nature and power of lens is required to correct it?

Q.35. Explain the Tyndall Effect?

Q.31. When the sun is setting, the light from it has to travel a ___ thickness of the earth’s atmosphere and only ___ wavelength ___ light is able to reach us sunset is therefore ___.
(Greater, Longer, Red, Red)
 
Download here Latest CBSE Sample Paper
 
 

About Study Online Help

We provide notes for good marks in Exam. You can download and share with friends. Sample Paper, Practice Paper, Model Test Paper, Important Question, VBQ Question, HOTS Question. Download free PDF and Video. Prepared by expert teachers from the latest edition of CBSE (NCERT) books.

Disclaimer: This website is not affiliated with any Education Board/University in any manner what so ever.

info@studyonlinehelp.com