Time: 3 Hrs.
Max. Marks: 90
- The question paper comprises of two sections A and B. You are to attempt both the sections.
- All the questions are compulsory.
- There is no overall choice in any of the questions.
- All questions of Section A and all questions of the Section B are to be attempted separately.
- Question nos. 1 to 3 in Section A are very short answer (VSA) type questions of 1 mark each, should be answered in one word or in one sentence.
- Question nos. 4 to 6 in Section A are short answer (SA) type questions of 2 mark each, should be answered in 20 to 40 words.
- Question nos. 7 to 18 in Section A are long answer (LA) type questions of 3 mark each, should be answered in 40 to 60 words.
- Question nos. 19 to 24 in Section A are very long answer (VLA) type questions of 5 mark each, should be answered in 60 to 100 words.
- Question nos. 25 to 33 in Section B are multiple choice question based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four choices provided to you.
- Question nos. 34 to 36 in Section B are two marks questions based on practical skills. These are to be answered in brief.
SECTION - A
Q.1. What is an oxidation reaction?
Q.2. Name the device that measure potential difference between two points in an electric circuit.
Q.3. What is the main constituent of bio-gas?
Q.4. Define ores. Name the ore of mercury.
Q.5. What is the role of trypsin and lipase in digestion?
Q.6. Draw magnetic field lines due to current carrying through a solenoid.
Q.7. What is respiration and write the reaction for it. State whether it is an exothermic or endothermic reaction.
Q.8. How is sodium hydroxide prepared? What is the name of this process? Write its chemical equation.
Q.9. Write two differences between roasting and calcination. Write the constituents of Brass alloy.
Q.10. When lead nitrate powder is taken in a boiling tube and heated it over a flame. State the type of reaction, colour of the fumes evolved and write the balanced equation.
Q.11. Draw a neat labelled diagram of neuron & label the following parts (i) Dendrite (ii) Axon and (iii) nerve ending.
Q.12. Write the balanced equations for the following reactions:
Hydrogen + Qxygen ---> Water
Silver Chloride ---> Silver + Chlorine
Ferrous Sulphate ---> Ferric Oxide + Sulphur dioxide + Sulphur trioxide
Q.13. A bulb is rated 220V and 500mA. Calculate the (i) power, (ii) resistance and (iii) energy consumed if this bulb is lighted for four hours.
Q.14. Which arrangement is used for domestic circuits? Give any two reasons.
Q.15. State the right hand thumb rule? What is its other name? How is it helpful?
Q.16. How the concept of magnetism (MRI) is used in medicines? Name the two organs in which magnetic field is produced?
Q.17. Write two points difference between renewable and non-renewable sources of energy. Choose the renewable sources of energy from the following list - coal, petroleum, solar energy, natural gas.
Q.18. What is a solar panel? Write two advantages and two disadvantages of use solar panel.
Q.19. What is the pH range for acid & base? What are the importance of pH in everyday life (any four).
Q.20. (a) Write the electron dot structure of Mg and Na.
Q.20. (b) Show the formation of Magnesium Chloride (MgCl2) and Na2O.
Q.21. (a) Draw the labeled diagram of human circulatory system.
Q.21. (b) Explain the mechanism of circulation of blood in Human.
Q.22. Describe different parts of the human brain and write one function each of the following parts of brain (a) Medulla (b) Cerebellum.
Q.23. (a) State Ohm's law. Draw V-I graph for a conductor.
Q.23. (b) On what factors does the resistance of a conductor depend?
Q.24. (a) How to find out the magnetic field lines of a bar magnet?
Q.24. (b) List out the properties of magnetic field lines of force.
Q.25. The colour of metal deposited when iron nails are dipped in aqueous solution of copper sulphate (a) Yellow (b) Reddish Brown (c) Grey (d) Silvery White.
Q.26. When CO2 is passed through lime water, the solution becomes milky due to the formation of
Q.27. Choose the correct sequence of their reactivity:
(a) K > Ca > Na > Mg
(b) Na > K > Mg > Ca
(c) K > Na > Ca > Mg
(d) Na > Ca > Mg > K
Q.28. In which of the following solution the blue litmus changes to red
(a) milk water
(b) dilute hydrochloric acid
(d) dilute sodium hydroxide
Q.29. Which product will obtain when Zinc metal reacts with sodium hydroxide?
Q.30. The following experiment is set up to show that a gas is released during respiration. In this set up, the small test tube containing pellets of KOH is kept in the conical flask to absorb:
(a) CO2 rleased by the germinating seeds.
(b) O2 in the air in the flask.
(c) Air in the flask.
(d) Moisture in the flask.
Q.31. Which of the following is slaked like.
Q.32. Calculate the least count of an ammeter of 5A, if total no. of divisions are 100.
Q.33. Ohm's law is valid for
Q.34. How do magnesium and Calcium float when react with hot water and cold water respectively?
Q.35. Write the symbol for variable resistance, wire crossing, ammeter and battery.
Q.36. What is the usual shape of guard cells in monocots and dicots?