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12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - II

12th Standard

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  1. \({ X }_{ m }{ Y }_{ n(s) }\overset { { H }_{ 2 }O }{ \rightleftharpoons } { mX }_{ (aq) }^{ n+ }+{ nY }_{ (aq) }^{ m- }\)

    (a)

    \({ [{ X }^{ n+ }] }^{ m }{ [Y^{ m- }] }^{ n }\)

    (b)

    \({ [X }^{ n+ }][{ Y }^{ m- }]\)

    (c)

    \({ [{ X }^{ n+ }] }^{ m }/{ [Y^{ m- }] }^{ n }\)

    (d)

    \({ [X }^{ n+ }]/[{ Y }^{ m- }]\)

  2.  Which among the following is incorrect regarding acids?

    (a)

    It produces H+ ions in aqueous solution

    (b)

    It can donate a proton to another substance

    (c)

    It can accept a proton from another substance

    (d)

    It accepts a pair of electrons

  3. When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid _______.

    (a)

    increases

    (b)

    decreases

    (c)

    dose not change

    (d)

    becomes zero

  4. Which one of the following formula represents Ostwald's dilution law for a binary whose degree of dissociation is a and concentration C.

    (a)

    \(K=\frac{(1-α)C}{α}\)

    (b)

    \(K=\frac{α^2C}{1-a}\)

    (c)

    K = \(\frac{(1-a)C}{a^2}\)

    (d)

    K = \(\frac{α^2C}{(1-α)c}\)

  5. Which one of the following relationship is correct?

    (a)

    \(pH=\frac { 1 }{ [{ H }^{ + }] } \)

    (b)

    \(pH={ \log }_{ 10 }[{ H }^{ + }]\)

    (c)

    \({ \log }_{ 10 }pH=[{ H }^{ + }]\)

    (d)

    \(pH={ \log }_{ 10 }\frac { 1 }{ [{ H }^{ + }] } \)

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