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. Give an example of a combination reaction.
Q.2. Name the device that measures electric current in a circuit.
Q.3. What is the main constituent of bio-gas?
Q.4. Define calcination.
Q.5. Explain why Bile juice is essential for digestion.
Q.6. Draw magnetic field lines due to current carrying through a straight conductor.
Q.7. What are phytohormones? What are the functions of the following phytohormones (i) Cytokinins (ii) Abscisic acid
Q.8. How is bleaching powder prepared? Write its chemical equation and two uses.
Q.9. Write any two properties of ionic compounds. Write the constituents of Bronze alloy.
Q.10. What do you mean by a displacement reaction? What condition is essential for it? Give one example.
Q.11. Draw the diagram of cross-section of a leaf and label the following in it: chloroplast, guard cell, lower epidermis, upper epidermis.
Q.12. Write the balanced equations for the following reactions:
Hydrogen + Oxygen ---> Water
Silver Chloride ---> Silver + Chlorine
Ferrous Sulphate ---> Ferric Oxide + Sulphur dioxide + Sulphur trioxide
Q.13. A piece of wire of resistance 25Ω is drawn so that its length is increased to twice its original length. Calculate the resistance of the wire in the new situation.
Q.14. Which arrangement is used for domestic circuits? Give reasons, and two.
Q.15. State the right hand thumb rule. What is its other name? How is it helpful?
Q.16. What is electromagnetic induction? Which rule is helpful to find the induced current and low?
Q.17. Define any three criteria for selecting and ideal fuel.
Q.18. What is the solar panel? Write two advantages and two disadvantages in use solar panel.
Q.19. What is the pH range for acid and base? What are the importance of pH in everyday life (any four).
Q.20. (a) What is reactivity series of metals?
Q.20. (b) How impure metals are refined? Draw the labeled diagram of electrolytic refining.
Q.21. (a) Draw a labeled diagram of human respiratory system.
Q.21. (b) Explain the mechanism of exchange of oxygen and carbon di-oxide in humans.
Q.22. Define hormone and which glands secrete it (exocrine or endocrine). Tabulate the hormones secreted from three different glands in animals. Write its role and the problems faced due to deficiency of hormones (any three).
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) Draw magnetic field lines in and around bar magnet.
Q.24. (b) List out the properties of magnetic field lines of force.
SECTION - B
Q.25. Over heating the colour of ferrous sulphate crystals changes to:
(a) blue (b) brown (c) green (d) colours
Q.26. 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 canonical flat to absorb:
(a) CO2 released by the germinating seeds
(b) O2 in the air in the flask
(c) Air in the flask
(d) Moisture in the flask & germinating seeds
Q.27. Barium sulphate is:
(a) soluble in water
(b) insoluble in water
(c) soluble in heating
(d) sparingly soluble
Q.28. In which of the following solution the blue litmus changes to red.
(a) milk water
(b) dilute hydrochloride acid
(d) dilute sodium hydroxide
Q.29. Which product will obtain when Zinc metal reacts with sodium hydroxide?
(a) Na2ZnO2 (b) NaZnO (c) Na2ZnO (d) Na2ZnO4
Q.30. When quick line is dissolved in water the bottom of the beaker
(a) remain same as earlier
(b) become hot
(c) become cool
(d) none of the above
Q.31. Which of the following is marble
Q.32. Calculate the least count of an ammeter of 3A, if total no. of divisions are 60.
Q.33. Ohm's law is valid for
Q.34. Write the balanced equation and the colour of the precipitate when solution of potassium iodide is added to lead nitrate solution.
Q.35. What will be the equivalent resistance of two resistors 3Ω and 12Ω in series combination?
Q.36. What is the stomata and write its function?