CBSE Board Guess Paper
Subject – Science
Class - X
1. Write the product formed when Ferrous Sulphate is heated?
2. Name the process by which sulphide ores converted into oxides.
3. What is the basic difference between asexual and sexual reproduction?
4. What do you mean by dispersion of light ? Name the various colours of spectrum.
5. Name two natural indicators.
6. What is the Composition of Aqua regia?
7. Differentiate between resistor and resistance.
8. Why do ionic compounds have high melting point?
9. What is resistance? State and explain the factors on which it depends.
10. A baker found that cake prepared is hard and small in size. Which ingredient has he for gotten to add? Write the name and formula of ingredient and explain how it would be help to make cake spongy and soft
11. What is vegetative propagation? State two advantages of it.
12. What are amphoteric oxides? Explain with the help of chemical reaction.
13. Which is better series combination or parallel combination in electric circuit and why?
14. Why metals replace hydrogen from dilute acids where non metal do not ? Explain.
15. What are the two methods of producing magnetic field? Which of these is better and why?
16. Calculate the potential difference, if there are 5000 charge carrier are flowing for 10 min through a resistance of 100 ohm.
17. A potential difference V across a conductor of length L & cross section area A how is the resistance R of conductor affected when only V is halved only L is halved and only A is halved?
18. Draw a sketch of pattern of field lines due to a solenoid carrying current . Why does a current carrying solenoid when suspended freely rests along particular direction.
19. A potential difference V across a conductor of length L & cross section area A how is the resistance R of conductor affected when only V is halved only L is halved and only A is halved?
20. Describe an experiment to study refraction of a light ray through a rectangular glass slab what are the important result obtained from the experiment?
21. What is meant by vegetative propagation? Describe its various ways. What is significance of vegetative propagation?
22. The reaction metal X and Fe2 O3 is highly exothermic and is used to join railway
(a) Identify metal X and name the reaction
(b) Write the chemical equation of its reaction with fe2 O3.