SolveItClass 10 · NCERT

NCERT Solutions · Class 10 Science Acids, Bases and Salts

15 questions · 15 still being checked

EXERCISES 1–10 (part 1 of 2)

  1. Exercise 1

    A solution turns red litmus blue, its pH is likely to be (a) (b) (c) (d)
    NCERT’s answer
    (d)

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  2. Exercise 2

    A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains
    (a)
    NaCl
    (b)
    HCl
    (c)
    LiCl
    (d)
    KCl
    NCERT’s answer
    (b)

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  3. Exercise 3

    10\displaystyle 10 mL of a solution of NaOH is found to be completely neutralised by 8\displaystyle 8 mL of a given solution of HCl. If we take 20\displaystyle 20 mL of the same solution of NaOH, the amount HCl solution (the same solution as before) required to neutralise it will be
    (a)
    4\displaystyle 4 mL
    (b)
    8\displaystyle 8 mL
    (c)
    12\displaystyle 12 mL
    (d)
    16\displaystyle 16 mL
    NCERT’s answer
    (d)

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  4. Exercise 4

    Which one of the following types of medicines is used for treating indigestion?
    (a)
    Antibiotic
    (b)
    Analgesic
    (c)
    Antacid
    (d)
    Antiseptic
    NCERT’s answer
    (c)

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  5. Exercise 5

    Write word equations and then balanced equations for the reaction taking place when –
    (a)
    dilute sulphuric acid reacts with zinc granules.
    (b)
    dilute hydrochloric acid reacts with magnesium ribbon.
    (c)
    dilute sulphuric acid reacts with aluminium powder.
    (d)
    dilute hydrochloric acid reacts with iron filings.

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  6. Exercise 6

    Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.

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  7. Exercise 7

    Why does distilled water not conduct electricity, whereas rain water does?

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  8. Exercise 8

    Why does dry HCL gas not show acidic behaviour in the absence of water?

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  9. Exercise 9

    Five solutions A,B,C,D and E when tested with universal indicator showed pH as 4,1,11,7\displaystyle 4,1,11,7 and 9\displaystyle 9, respectively. Which solution is
    (a)
    neutral?
    (b)
    strongly alkaline?
    (c)
    strongly acidic?
    (d)
    weakly acidic?
    (e)
    weakly alkaline? Arrange the pH in increasing order of hydrogen-ion concentration.

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  10. Exercise 10

    Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?

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