Quiz 10th Science

1. Bio-catalysts called enzymes.

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

3. Carnivores like tigers have a longer  small intestine.

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

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

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

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

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

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

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

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

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

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

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

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

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

17. Villi  increases the surface area for absorption.

18. Sphygmomanometer measures blood pressure in human body.

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

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

21. H2(g) + Cl2(g) → 2HCl(g) is a

22. Reduction of carbon dioxide to
carbohydrates.

23. Photolysis is a decomposition reaction caused by ___________

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

25. What will the product in burning of magnesium?

26. chlorophyll is not essential for photosynthesis.

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

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

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

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

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

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

33. 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

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

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

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

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

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

39. Which gas is released in the picture ?

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

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

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

43.

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

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

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

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

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

48. Lipase converts  fats into fatty acids and glycerol.

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

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