ACIDS, BASES AND SALTS
38 minutes ago
chemdinesh2007_19254
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  • Question 1
    30 seconds
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    Q.

    which does not contain any water of crystallisation

    answer choices

    blue vitriol

    baking soda

    washing soda

    gypsum

  • Question 2
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    Q.

    sodium carbonate is a basic salt because it is a salt of

    answer choices

    strong acid and strong base

    weak cid and weak base

    strong acid and weak base

    weak acid and strong base

  • Question 3
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    Q.

    Calcium phosphate is present in tooth enamel. its nature is

    answer choices

    basic

    acidic

    neutral

    amphoteric

  • Question 4
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    Q.

    Which of the correct increasing order of acidic strength

    answer choices

    water< acetic acid< HCl

    water < HCl< acetic acid

    acetic acid < water < HCl

    HCl < water < acetic acid

  • Question 5
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    Q.

    Sodium hydrogen carbonates when added to acetic acid evolves a gas. Which of the following statements are not correct about the gas evolved

    answer choices

    it turn lime water milky

    it extingushes a burning splinter

    It dissolves in a solution of sodium hydroxide

    it has a pungent odour

  • Question 6
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    Q.

    One of the constituents of baking powder is sodium hydrogen carbonate. The other constituent is:

    answer choices

    hydrochloric acid

    tartaric acid

    acetic acid

    sulphuric acid

  • Question 7
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    Q.

    to protect tooth decay, we are advised to brush our teeth regularly. The nature of the tooth paste is

    answer choices

    basic

    acidic

    neutral

    corrosive

  • Question 8
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    Q.

    The pH of gastric juice released during digestion is

    answer choices

    < 7

    >7

    7

    0

  • Question 9
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    Q.

    which of the following can be used as an acid-base indicator by a visually impared student

    answer choices

    litmus

    turmuric

    vanilla essence

    petunia leaves

  • Question 10
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    Q.

    Which of the following is acidic in nature

    answer choices

    lime juice

    human blood

    lime water

    antacid

  • Question 11
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    Q.

    Which of the following statement is true for acids

    answer choices

    bitter and change red litmus to blue

    sour and change red litmus to blue

    sour and blue litmus to red

    bitter and change blue litmus to red

  • Question 12
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    Q.

    acid present in ant sting

    answer choices

    methanoic acid

    ethanoic acid

    propanoic acid

    butanoic acid

  • Question 13
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    Q.

    plaster of paris contains

    answer choices

    1/2 water molecules

    1 water molecules

    1 and half water molecules

    2 water molecules

  • Question 14
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    Q.

    brine solution is

    answer choices

    aq KCl

    aq NaCl

    aq CaCl2

    aq CaO

  • Question 15
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    Q.

    a compound X react with a gas Y to give a compound C which is used for bleaching purposes. Identify A, B and C

    answer choices

    slaked lime, chlorine, bleaching powder

    quick lime, chlorine, bleaching powder

    slaked lime, hydrogen, bleaching powder

    milk of magnesia, carbondioxide, gypsum

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