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12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I Question Bank Software Jun-02 , 2021

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12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 15

    Part I

    5 x 3 = 15

  1. Give the uses of silicones.

  2. Describe the structure of diborane.

  3. Give one example for each of the following
    (i) icosogens
    (ii) Tetragens
    (iii) pnictogens
    (iv) chalcogens

  4. Write a note on metallic nature of p-block elements.

  5. Complete the following reactions.
    a. \(B(OH)_3 + NH_3\longrightarrow \)
    b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
    c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
    d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
    e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
    f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
    g. \(2SiCl_{ 4 }+NH\)3
    h. SiCl4 + 4C2H5OH \(\rightarrow\)
    i. 2\(B+6NaOH\longrightarrow \)
    j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

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