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12th Standard Chemistry English Medium - p - Block Elements - II 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 Study Materials Sep-01 , 2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Chemistry Subject - p - Block Elements - II, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

12th Standard Chemistry English Medium - p - Block Elements - II 1 Mark Book Back Question Paper and Answer Key 2022 - 2023

p - Block Elements - II 1 Mark Book Back Question Paper With Answer Key

12th Standard

    Reg.No. :
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Chemistry

Time : 00:17:00 Hrs
Total Marks : 17

    Multiple Choice Question

    17 x 1 = 17

  1. In which of the following, NH3 is not used?

    (a)

    Nessler's reagent

    (b)

    Reagent for the analysis of IV group basic radical

    (c)

    Reagent for the analysis of III group basic radical

    (d)

    Tollen's reagent

  2. Which is true regarding nitrogen?

    (a)

    least electronegative element

    (b)

    has low ionisation enthalpy than oxygen

    (c)

    d- orbitals available

    (d)

    ability to form pπ-pπ bonds with itself

  3. An element belongs to group 15 and 3rd period of the periodic table, its electronic configuration would be_______.

    (a)

    1s2 2s2 2p4

    (b)

    1s2 2s2 2p3

    (c)

    1s2 2s2 2p6 3s2 3p2

    (d)

    1s2 2s2 2p6 3s2 3p3

  4. Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

    (a)

    P4(red) & PH3

    (b)

    P4(white) & PH3

    (c)

    S8 & H2S

    (d)

    P4(white) & H2S

  5. On hydrolysis, PCl3 gives________.

    (a)

    H3PO3

    (b)

    PH3

    (c)

    H3PO4

    (d)

    POCl3

  6. P4O6 reacts with cold water to give _______.

    (a)

    H3PO3

    (b)

    H4P2O7

    (c)

    HPO3

    (d)

    H3PO4

  7. The basicity of pyrophosphorous acid ( H4P2O5) is _______.

    (a)

    4

    (b)

    2

    (c)

    3

    (d)

    5

  8. The molarity of given orthophosphoric acid solution is 2M. Its normality is _______.

    (a)

    6N

    (b)

    4N

    (c)

    2N

    (d)

    none of these

  9. Among the following, which is the strongest oxidizing agent?

    (a)

    Cl2

    (b)

    F2

    (c)

    Br2

    (d)

    l2

  10. The correct order of the thermal stability of hydrogen halide is_______.

    (a)

    HI > HBr > HCl > HF

    (b)

    HF > HCl > HBr > HI

    (c)

    HCl > HF > HBr > HI

    (d)

    HI > HCl > HF > HBr

  11. Which one of the following compounds is not formed?

    (a)

    XeOF4

    (b)

    XeO3

    (c)

    XeF2

    (d)

    NeF2

  12. Most easily liquefiable gas is _______.

    (a)

    Ar

    (b)

    Ne

    (c)

    He

    (d)

    Kr

  13. XeF6 on complete hydrolysis produces________.

    (a)

    XeOF4

    (b)

    XeO2F2

    (c)

    XeO3

    (d)

    XeO2

  14. Which of the following is strongest acid among all?

    (a)

    HI

    (b)

    HF

    (c)

    HBr

    (d)

    HCl

  15. Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

    (a)

    Br2 > I2 > F2 > Cl2

    (b)

    F2 > Cl2 > Br2 > l2

    (c)

    I2 > Br2 > Cl2 > F2

    (d)

    Cl2 > Br2 > F2 > I2

  16. Among the following the correct order of acidity is ________.

    (a)

    HClO2 < HClO < HClO3 < HClO4

    (b)

    HClO4 < HClO2 < HClO < HClO3

    (c)

    HClO3 < HClO4 < HClO2 < HClO

    (d)

    HClO < HClO2 < HClO3 < HClO4

  17. When copper is heated with conc HNO3 it produces ________.

    (a)

    Cu(NO3)2, NO and NO2

    (b)

    Cu(NO3)2 and N2O

    (c)

    Cu(NO3)2 and NO2

    (d)

    Cu(NO3)2 and NO

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