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
