| 1. | Many salts absorbs water from atmosphere. This property is called ? | |
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addition
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deliquescence
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hydration
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efflorescence
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Report Question| 2. | Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained ? | |
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Yellowish green
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Blue
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Yellow
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Red
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| 3. | NaOH is obtained by electrolysis of ? | |
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Molten NaCl
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Aq. NaHCO3
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Aq. Na2CO3
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Aq. solution of NaCl
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| 4. | What happens when a base is added to vanilla ? | |
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Nothing happens
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Color of vanilla changes into red
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Vanilla loses its smell
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Vanilla becomes colorless
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| 5. | Methyl orange is ? | |
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Colourless in acidic medium, pink in basic medium
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Pink in acidic medium, colourless in basic medium
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Pink in acidic medium, yellow in basic medium
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Yellow in acidic medium, pink in basic medium
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| 6. | Which one of the given is true, if a substance has a pH value of 4 ? | |
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The substance is a neutral substance
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The substance is a base
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The substance is an acid
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Either (1) or (2)
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| 7. | Black ash is ? | |
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Barium sulphide
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Hydrated KOH
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Dry KOH
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Charcoal
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| 8. | Sodium hydroxide turns phenolphthalein solution ? | |
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orange
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colourless
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pink
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yellow
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| 9. | Nettle sting is a natural source of which acid ? | |
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Tartaric acid
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Citric acid
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Lactic acid
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MetiWanoic acid
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| 10. | Lime water reacts with chlorine to form ? | |
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Ca(ClO3)2
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CaCl2
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CaOCl2
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CaO2Cl2
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