• Find the % composition of the following-
    1. Oxygen in Hg2(NO3)2
    2. Sulphur in Na2S2O3
    3. Nitrogen in NH4NO2
    4. Hydrogen in (NH4)3PO4
    5. Oxygen in Fe2O3. 3H2O                                                                         

[Hg= 200, N=14,O=16,Na=23,S=32,H=1,P=31,Fe=56,Cl=35.5,C=12,Br=80]

  • Write the formula of the following:
    1. Ammonium sulphate
    2. Aluminium phosphate
    3. Calcium borate
    4. Zinc nitride
    5. Ammonium dichromate                                     
  • Write the name of the following:
    1. K2ZnO2
    2. Na2PbO2
    3. (NH4)3PO4
    4. Fe(C2O4)
    5. (CH3COO)Cu                                                                  
  • Sulfate of an element M is MSO4. Find the formula of its-
    1. Hydroxide
    2. Permanganate
    3. Oxalate
    4. Oxide
    5. Nitride                                                                       
  • Balance the following:
    1. Na2S2O3 + HCl →NaCl + H2O + SO2 + S
    2. NH3 + P2O5 + H2O → (NH4)3PO4
    3. Mg3N2 + H2O → Mg(OH)2 + NH3
    4. NH3 + Cl2 → HCl + NCl3
    5. C + HNO3 → CO2 + H2O + NO2
    6. S + HNO3 → H2SO4 + H2O + NO2
    7. Cu + H2SO4 → CuSO4 + H2O + SO2
    8. FeSO4 + H2SO4 + HNO3 → Fe2(SO4)3 + H2O + NO
    9. P2O5 + HCl → POCl3 + HPO3
    10. HNO3 + HCl → NOCl + H2O +[Cl]                                   

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