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

12th Standard

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 5

    Part I

    5 x 1 = 5
  1. H2PO4- the conjugate base of _______.

    (a)

    PO43−

    (b)

    P2O5

    (c)

    H3PO4

    (d)

    HPO42-

  2. Which of the following can act as Lowery – Bronsted acid well as base?

    (a)

    HCl

    (b)

    SO42−

    (c)

    HPO42−

    (d)

    Br-

  3. The pH of an aqueous solution is Zero. The solution is _______.

    (a)

    slightly acidic

    (b)

    strongly acidic

    (c)

    neutral

    (d)

    basic

  4. The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by _______.

    (a)

    \([{ H }^{ + }]=\frac { { K }_{ a }[acid] }{ [salt] } \)

    (b)

    \([{ H }^{ + }]={ K }_{ a }[salt]\)

    (c)

    \([{ H }^{ + }]={ K }_{ a }[acid]\)

    (d)

    \([{ H }^{ + }]=\frac { { K }_{ a }[salt] }{ [acid] } \)

  5. Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

    (a)

    \(h=\sqrt { \frac { { K }_{ h } }{ C } } \)

    (b)

    \(h=\sqrt { \frac { { K }_{ a } }{ K_b } } \)

    (c)

    \(h=\sqrt { \frac { { K }_{ w } }{ { K }_{ a }.{ K }_{ b } } } \)

    (d)

    \(h=\sqrt { \frac { { { K }_{ a }.{ K }_{ b } } }{ { K }_{ w } } } \)

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