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SAMPLE PAPER. CLASS - X SCIENCE (MCQ). PRACTICAL SKILL IN SCEINCE
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CBSE SAMPLE PAPER CLASS - X SCIENCE (MCQ) PRACTICAL SKILL IN SCEINCE AND TECHNOLOGY [Time: 1:30 hrs.]
[M. M.: 20]
General Instructions:(1) Attempt all the questions both the sections (2) The questions of section A carry half mark each and questions of section B carry one marks each. (3) Please tick (√) correct answer. SECTION – A Q1. Which lens has virtual focus? a. Convex lens b. Concave lens c. Both convex and concave lens d. None Q2. A small electric lamp placed at the focal point of convex lens producesa. Converging flam of light b. Parallel beam of light c. Diverging beam of light d. Diffused beam of light. Q3. In a circuita. Ammeter is always connected in parallel and voltmeter in series b. Both are connected in series c. Both are connected in parallel d. Ammeter is always connected in series and voltmeter is parallel with resistor Q4. A convex lens of focal length forms an images of an object equal in size of the object the object is placed at a distancea. Greater then 2f b. Less than f c. Equal to 2f
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d. Between f and 2f Q5. The central point on the surface of the mirror is called a. Centre of curvature b. Focus c. Pole d. Aperture Qa6. Lime water is an aqueous solution of a. Calcium Carbone b. Calcium chloride c. Calcium hydroxide d. Calcium bicarbonate Q7. When red litmus paper is added to NaOH solution it turnsa. Blue b. Red c. Colourless d. May turn blue or red depending upon the concentration of NaOH. Q8. PH of a dilute solution of Hcl is expected to be a. Greater then 7 but less than 10 b. Equal to 7 c. Less than 2 d. Greater than 5 but less than 7 Q9. The acid present in vinegar is a. CH3COOH b. Dill HCl c. Carbonic acid d. Citric acid Q10. The molecular formula of potassium dichromate is a. K2Cr2O7 b. K2CrO4 c. KMnO4 d. K2MnO4 Q11. Zinc reacts with an acid as well as with a base to liberate H2? On this basis what should to the nature of zinc metal? a. Basic b. Acidic c. Amphoteric d. Neutral Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
Q12. A convex lens a. Is thicker at the edges than at the middle b. Has uniform thickness all through c. Is thicker at the middle than at the edges d. Is called a diverging lens. Q13. A ray of light incident on one of the parallel faces of rectangular glass slab, emerges out of the opposite parallel face. a. Inclined to the incident ray b. Along the same straight line as the incident ray c. Parallel to the incident ray but laterally displaced. d. Gets absorbed into the body of the glass and does not emerge out of it. Q14. The S.I. Unit of electric current is a. Ohm b. Volt c. Ampere d. Coulomb Q15. If V, R and I are the symbols for potential difference, resistance & current respectively for an electrical circuit, then form ohm’s law, we have R a. V = I I b. V = R c. V = IR d. I = RV Q16. The instrument used opt measure transpiration is a. Poto meter b. Porometer c. Axonometer d. Clinostat Q17. We put the cover slips on the slide very greatly to avoid a. Entry for air bubbles b. Crushing of the material c. Oozing of glycerin d. Folding of the material Q18. Which of the following stain is used to see the stomata during temporary mount a leaf peel? a. Safranin Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
b. Methylene blue c. Cotton blue d. Non of these Q19. Name the multicellular organism which shows budding a. Entamoeba b. Earthworm c. Hydra d. Mosquito Q20. In which of the following solvent leaf is boiled to remove chlorophyll? a. Water b. Alcohol c. Lodine solution d. Starch solution SECTION – B Q21. A student draws the following sketch of stomatal aperture and numbers the part to label them The chloroplast is denoted by a. 1 b. 2 c. 3 d. 4 Q22. During the refraction of light through a rectangular glass slab, the lateral shifta. decreases with increase in the thickness of the slab b. Increases with increase in the thickness of the slab c. Does not change with the thickness of the slab d. None of the above Q23. Photosynthesis is maximum in a. Green light b. Blue light c. Red light d. Violet light Q24. The process of calcinations is used for a. Carbonate ores b. Sulphide ores Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
c. Nitrate ores d. Sulphate ores Q25. Iron filings were added to a solution of copper sulphate. After 10 minutes it was observed that the blue colour of the solution has changed & layer of coating has deposited on iron filings. Which one of the following set of colours correspond to the colour of the solution and the colour of the coating respectively? a. Yellow and green b. Brown and blue c. Red and greenish blue d. Light and reddish brown Q26. Which on of the following in the best set up for taking the path of a ray of light through a rectangular glass slab?
a.
b.
c.
d. Q27. Image formed in a photographic cornea is a. Virtual and diminished b. Real and magnified c. Real and diminished d. Sometimes real and sometimes virtual Q28. The graph between current (i) and potential difference (v) in the experimental verification of ohm’s law should be of the type. a.
b. Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
c.
d.
Q29. What is the missing term in the following equations? 2HCl(aq) + Na3CO3(s) 2NaCl(aq) + CO2(g) + ………………………… a. H2CO3 b. Na2CO3 c. H2O d. NaOH Q30. Which on of the following will be required to identify the gas evolved when dilute hydrochloric acid reacts with zinc metal? a. Blue litmus paper b. Red litmus paper c. A burning splinter d. Lime water
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