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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