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    Home » Important Reactions of p – Block Elements Class 12

    Important Reactions of p – Block Elements Class 12

    Dr. Vikas JasrotiaBy Dr. Vikas JasrotiaAugust 16, 2021No Comments
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    Important Reactions of p – Block Elements Class 12

    Important Reactions of p – Block Elements Class 12

    Que 1. Complete the reaction:
    (a) XeF4 + SbF5 ⎯⎯→
    (b) XeF2 + PF5 ⎯⎯→
    (c) XeF4 + O2F2 ⎯⎯→
    (d) Ca(OH)2 (dry) + Cl2 →
    (e) MnO2 + HCl →
    (f) 2 HNO3 →
    (g) 6 XeF4 + 12 H2O →
    (h) XeF6 + 3 H2O →
    Ans 1. (a) [XeF3]+ [SbF6]–
    (b) [XeF]+ [PF6]–
    (c) XeF6 + O2
    (d) CaOCl2 + CaCl2 + H2O
    (e) MnCl2 + Cl2 + H2O
    (f) H2O + N2O5
    (g) 4 Xe + 2 XeO3 + 24HF + 3O2
    (h) XeO3 + 6 HF

    Important Reactions of p – Block Elements Class 12

    Que 2. Complete the following reactions:
    (a) (NH4)2Cr2O7 →
    (b) Ba(N3)2 →
    (c) Cu2+ + NH3 →
    (d) P4 + 3 NaOH + 3 H2O →
    (e) SO3 + H2SO4 →
    (f)) Cl2 + H2O →
    (g) Cl2 + NaOH (Hot & Conc.) →
    Ans 2. (a) N2 + 4 H2O + Cr2O7
    (b) Ba + 3H2
    (c) [Cu(NH3)4]+2
    (d) PH3 + 3 NaH2PO2
    (e) H2S2O7 (Oleum)
    (f) HCl + HClO (Yellow)
    (g) NaCl + NaClO + H2O

    Important Reactions of p – Block Elements Class 12

    Que 3. Write equations for
    (a) Reaction of Cu with dilute HNO3.
    (b) Reaction of Cu with concentrated HNO3.
    (c) Reaction of Zn with dilute HNO3.
    (d) Reaction of calcium phosphide with H2O.
    (e) Reaction of white phosphorus with an excess of Cl2
    Ans 3. (a) Cu + HNO3 (dil) → Cu(NO3)2 + NO + H2O
    (b) Cu + HNO3 (Conc.) → Cu(NO3)2 + NO2 + H2O
    (c) Zn + HNO3 (dil) → Zn(NO3)2 + N2O + H2O
    (d) Ca3P2 + H2O → Ca(OH)2 + PH3
    (e) P4 + 10 Cl2 → 4 PCl5

    Que 4. Complete the reaction:

    Ans 4. (1) XeF6
    (2) XeF2
    (3) XeF4
    (4) Na+ [XeF7]–
    (5) Xe + HF + O2

    Important Reactions of p – Block Elements Class 12

    Que 5. Complete the following Reactions
    (a) SO3 + H2SO4 →
    (b) Fe3+ + SO2 + H2O →
    (c) SO2 + MnO4 – + H2O →
    (d) 2 F2 + 2 H2O →
    (e) 4 HCl + O2 →
    (f) H2S + Cl2 →
    (g) In excess of NH3:‐ 8 NH3 + 3Cl2 →
    (h) I2 + 6 H2O + 5 Cl2 →
    Ans 5. (a) SO3 + H2SO4 → H2S2O7
    (b) 2 Fe3+ + SO2 + 2 H2O → 2Fe2+ + SO42– + 4 H+
    (c) 5 SO2 + 2 MnO4 – + 2 H2O → 5 SO42– + 4 H+ + 2 Mn2+
    (d) 4 HF + O2
    (e) 2 Cl2 + 2H2O
    (f) 2 HCl + S
    (g) 6 NH4Cl + N2
    (h) 2HIO3 + 10 HCl

    Important Reactions of p – Block Elements Class 12
     

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