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61. Which of the following salt does not contain the water of crystallization? (NTSE Uttar Pradesh, Stage-I, 2016-17)
Blue vitriol
Baking soda
Washing soda
Gypsum
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62. Acidic solvents are (NTSE Uttar Pradesh, Stage-I, 2016-17)
Those who donate proton
Accept proton
Either can give or accept proton
Neither give nor accept proton
63. Which natural indicator (acid-base) is used in kitchens of our homes? (NTSE Haryana, Stage-I, 2016-17)
Sodium chloride
Tea leaves
Sodium carbonate
Tunneric
64. A milkman added a small pinch of baking soda to fresh milk which had pH close to 6. As a result, pH of the medium (NTSE Jharkhand, Stage-I, 2016-17)
Became close to 2
Became close to 4
Did not undergo any change
Became close to 8
65. Which of the following salts does not contain any water of crystallisation? (NTSE Jharkhand, Stage-I, 2016-17)
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