NMMS CLASS 7 Acids, Bases and Salts 31 - 60

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NMMS CLASS 7 Acids, Bases and Salts 31 - 60👇




31. Which of the following acids is known as muriatic acid?

  • Nitric acid
  • Acetic acid
  • Sulphuric acid
  • Hydrochloric acid

32. Which acid is used in soft drinks?

  • Acetic acid
  • Nitric acid
  • Carbonic acid
  • Formic acid

33. Which of the following is a weak base?

  • Sodium hydroxide
  • Potassium hydroxide
  • Ammonium hydroxide
  • Calcium hydroxide

34. Which of the following substances is neutral?

  • Vinegar
  • Soap
  • Common salt
  • Lemon juice

35. Which of these is used to test acids and bases?

  • Cotton paper
  • Wax paper
  • Filter paper
  • Litmus paper

36. Which of the following changes red litmus to blue?

  • Acid
  • Salt
  • Base
  • Water

37. Which of these is formed when carbon dioxide reacts with lime water?

  • Calcium carbonate
  • Calcium hydroxide
  • Sodium carbonate
  • Calcium chloride

38. Which one is used as an antacid in medicines?

  • Sodium chloride
  • Magnesium hydroxide
  • Ammonium nitrate
  • Copper sulphate

39. Which acid is present in tomato?

  • Acetic acid
  • Formic acid
  • Oxalic acid
  • Carbonic acid

40. What type of substances are used to neutralize acids in the stomach?

  • Acids
  • Salts
  • Bases
  • Indicators

41. Which salt is used for bleaching clothes?

  • Washing soda
  • Bleaching powder
  • Baking soda
  • Rock salt

42. Which acid is used in making explosives?

  • Nitric acid
  • Acetic acid
  • Sulphuric acid
  • Formic acid

43. What happens when an acid reacts with metal carbonate?

  • Carbon dioxide is released
  • Hydrogen is released
  • Ammonia is released
  • Oxygen is released

44. Which of the following is not an indicator?

  • Litmus
  • Turmeric
  • Sugar solution
  • Phenolphthalein

45. Which base is also known as caustic soda?

  • Potassium hydroxide
  • Calcium hydroxide
  • Sodium hydroxide
  • Magnesium hydroxide

46. Which acid is used in pickles to preserve them?

  • Lactic acid
  • Nitric acid
  • Citric acid
  • Acetic acid

47. Which of the following turns phenolphthalein pink?

  • Acid
  • Salt
  • Base
  • Neutral solution

48. Which gas is produced when an acid reacts with a metal?

  • Oxygen
  • Nitrogen
  • Hydrogen
  • Carbon dioxide

49. Which base is commonly known as slaked lime?

  • Magnesium hydroxide
  • Sodium hydroxide
  • Potassium hydroxide
  • Calcium hydroxide

50. Which of the following is used to make toothpastes slightly basic?

  • Sulphuric acid
  • Calcium carbonate
  • Ammonium chloride
  • Acetic acid

51. Which of the following is used to make baking powder?

  • Lemon juice and salt
  • Vinegar and ammonia
  • Baking soda and tartaric acid
  • Calcium oxide and water

52. Which of the following can neutralize a base?

  • A salt
  • Another base
  • An acid
  • Water

53. Which solution has pH less than 7?

  • Basic solution
  • Neutral solution
  • Salt solution
  • Acidic solution

54. Which acid is found in apples?

  • Formic acid
  • Lactic acid
  • Malic acid
  • Citric acid

55. What does pH scale measure?

  • Density
  • Temperature
  • Acidity or basicity
  • Purity

56. Which of the following can be used to detect pH value?

  • Salt solution
  • Water
  • Universal indicator
  • Turmeric paste

57. Which of the following salts gives a neutral solution in water?

  • Sodium chloride
  • Ammonium chloride
  • Sodium carbonate
  • Copper sulphate

58. What is the taste of acids?

  • Bitter
  • Sweet
  • Sour
  • Salty

59. Which acid is used for cleaning metals before galvanization?

  • Sulphuric acid
  • Nitric acid
  • Hydrochloric acid
  • Acetic acid

60. Which gas is produced when zinc reacts with hydrochloric acid?

  • Carbon dioxide
  • Oxygen
  • Nitrogen
  • Hydrogen
Location: Mogalturu, Andhra Pradesh 534281, India

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