| 1. | Alkalis are ? | |
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acids, which are soluble in water
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acids, which are insoluble in water
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bases, which are soluble in water
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bases, which are insoluble in water
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Report Question| 2. | Brine is an ? | |
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aqueous solution of sodium bicarbonate
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aqueous solution of sodium carbonate
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aqueous solution of sodium hydroxide
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aqueous solution of sodium chloride
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| 3. | Egg shell is made up of ? | |
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CaCl2
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CaO
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CaCO3
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Ca(OH)2
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| 4. | Which one of the following can be used as an acid-base indicator by a visually impared (blind) student ? | |
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Turmeric
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Vanilla essence
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Litmus
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Petunia leaves
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| 5. | NaHCO, formed by reaction of ? | |
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NaOH + Na2CO3
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Na2CO3 + HCl
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NaCl + H2CO3
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NaOH + H2CO3
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| 6. | Ag2S reacts with H2SO4 to form ? | |
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AgOH + H2S
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AgSO4
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Ag2O + H2S
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Ag2SO4 + H2S
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| 7. | Sodium carbonate is a basic salt because it is a salt of a ? | |
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strong acid and weak base
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weak acid and strong base
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weak acid and weak base
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strong acid and strong base
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| 8. | An aqueous solution with pH zero is ? | |
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Amphoteric
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Neutral
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Acidic
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Alkaline
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| 9. | The H + ion concentration of a solution is 1.0×10-5m. The solution is ? | |
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Neutral
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Amphoteric
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Acidic
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Alkaline
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| 10. | Due to excess passing of CO2 through an aqueous solution of slaked lime, its milkiness fades because ? | |
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Due to the production of more heat
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Calcium oxide is produced
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Calcium carbonate is produced
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Calcium bi-carbonate is produced
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