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Quiz 10th Science

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10th Science

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1. Hypertension is caused by the constriction of arterioles which can lead to the rupture of an artery and internal bleeding.

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2. What will the product in burning of magnesium?

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3. The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the
following types of reaction?

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4. The guard cells swell when water
flows into them, causing the stomatal pore to open.

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5. The heterotrophs survival depends directly or indirectly on autotrophs.

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6. Lipase converts  fats into fatty acids and glycerol.

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7. The hydrochloric acid creates an acidic medium which
facilitates the action of the enzyme pepsin.

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8. Parasitic nutritive strategy is used
by a wide variety of organisms like cuscuta (amar-bel), ticks, lice,
leeches and tape-worms.

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9. The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type compound it is?

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10.

  1. A solution turns red litmus blue, its pH is likely to be

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11. The atomic number of that element which can be cut with knife easily.

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12. Paramoecium has a definite shape and food is taken in at a specific spot.

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13. The molecular formula of an open chain organic compound is C3H6. The class of the compound
is

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14. Amphibians or many reptiles have two-chambered hearts.

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15. Villi  increases the surface area for absorption.

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16. Carnivores like tigers have a longer  small intestine.

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17. The mucus protects the inner lining of the stomach from the action of the acid under normal conditions.

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18. Breakdown of pyruvate using oxygen takes place in the mitochondria.

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19. Veins carry blood away from the heart to various organs of the body.

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20. If the alveolar surface were spread out, it would cover about 80 m2.

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21. Blood goes only once through the heart in the fish during one cycle of passage through the body.

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22. Reduction of carbon dioxide to
carbohydrates.

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23. Plasma transports food, carbon dioxide and nitrogenous wastes in dissolved form.

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24. The break-down of glucose, a six-carbon molecule, into  pyruvate takes place in the mitochondria.

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25. Which gas is released in the picture ?

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26. The trachea  provides a surface where the exchange of gases can take place.

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27. The normal systolic pressure is about 120 mm of Hg and diastolic pressure is 80 mm of Hg.

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28. In conversion of ATP into ADP energy is released.

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29. The pancreas secretes pancreatic juice which contains enzymes like trypsin for digesting proteins and lipase for breaking down emulsified fats.

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30. the complete digestion of carbohydrates, proteins and fats take place in stomach.

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31. pyruvate converts into CO2 and water molecule in mitochondria.

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32. H2(g) + Cl2(g) → 2HCl(g) is a

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33. Photolysis is a decomposition reaction caused by ___________

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34. Rings of cartilage are present in the throat. These ensure that the air-passage does not collapse.

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35. The food we eat is stored in our body in the form
of glucose.

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36. Bio-catalysts called enzymes.

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37. Sphygmomanometer measures blood pressure in human body.

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38. Exchange of material between the blood and surrounding cells takes place across the capillaries.

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39. The saliva contains an enzyme called salivary amylase that breaks down starch which is a complex molecule to give simple sugar.

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40. The reaction between carbon and oxygen is represented by C(s) + O2(g) → CO2(g) + Heat. In which
of the type(s), the above reaction can be classified?

(i) Combination Reaction (ii) Combustion Reaction
(iii) Decomposition Reaction (iv) Irreversible Reaction

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41. chlorophyll is not essential for photosynthesis.

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42. Arteries collect the blood from different organs and bring it back to the heart.

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43. Powdered CaCO3 reacts more rapidly than flaky CaCO3 because of ___________.

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44. Conversion of light energy to chemical
energy and splitting of water molecules
into hydrogen and oxygen.

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45. Which metal is found in liquid state at room temperature?

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46. Carbon dioxide is more soluble in water than oxygen is and hence is mostly transported in the dissolved form in our blood.

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47. In demonstration of photosynthesis carbon dioxide is used in it. The potassium
hydroxide is used to absorb
carbon dioxide.

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48. The exit of waste of digestive  material is regulated by the anal sphincter.

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49. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains

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50. The respiratory pigment is haemoglobin  has a very high affinity for carbon dioxide.

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