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11th Standard English Medium Chemistry Subject Alkali and Alkaline Earth Metals Book Back 1 Mark Questions with Solution Part - I

11th Standard

    Reg.No. :
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Chemistry

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

    Part I

    5 x 1 = 5
  1. In context with beryllium, which one of the following statements is incorrect ?

    (a)

    It is rendered passive by nitric acid

    (b)

    It forms Be2C

    (c)

    Its salts are rarely hydrolysed

    (d)

    Its hydride is electron deficient and polymeric

  2. A colourless solid substance (A) on heating evolved CO2 and also gave a white residue, soluble in water. Residue also gave CO2 when treated with dilute HCI ___________

    (a)

    Na2CO3

    (b)

    NaHCO3

    (c)

    CaCO3

    (d)

    Ca(HCO3)2

  3. Which of the following statement is false ?

    (a)

    Ca2+ ions are not important in maintaining the regular beating of the heart

    (b)

    Mg2+ ions are important in the green parts of the plants

    (c)

    Mg2+ ions form a complex with ATP

    (d)

    Ca2+ ions are important in blood clotting

  4. Formula of Gypsum is _______________

    (a)

    CaSO4.2H2O

    (b)

    CaSO4·1/2 H2O.

    (c)

    3CaSO4.H2O

    (d)

    2CaSO4.2H2O

  5. Among the following the least thermally stable is ___________

    (a)

    K2CO3

    (b)

    Na2CO3

    (c)

    BaCO3

    (d)

    Li2CO3

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