Chemical reaction and equations worksheet-6
Multiple Choice Questions:
(A) Ca2+ HCO32– (B) Ca+ HCO3– (C) Ca2+ HCO3– (D) Ca+ HCO32–
(E) Ca3+ HCO32–
(A) Mg2+ Br– (B) Mg+ Br– (C) Mg2+ Br2– (D) Mg3+ Br–
(E) Mg+ Br–
(A) PbSO4 (B) Pb(SO4)2 (C) Pb2SO4 (D) Pb(SO4)3
(A) Cu2O (B) CuO (C) CuO2 (D) Cu2O2
H2S + O2 → SO2 + H2O
(A) H2S, 3O2, 2SO2, 2H2O (B) 2H2S, 3O2, 2SO2, 2H2O
(C) 2H2S, 3O2, 2SO2, H2O (D) 2H2S, 3O2, 2SO2, 2H2O
Na + H2O → NaOH + H2
(A) 2Na, 2H2O, 2NaOH, H2 (B) Na, 2H2O, NaOH, H2
(C) 2Na, 2H2O, 2NaOH, H2 (D) 2Na, H2O, NaOH, H2
BaCl2(aq) + Al2(SO4)3(aq) → AlCl3(aq) + BaSO4
(A) BaCl2, Al2 (SO4)3, 2AlCl3, 3BaSO4
(B) 3BaCl2, Al2(SO4)3, 2AlCl3, BaSO4
(C) 3BaCl2, Al2(SO4)3, 2AlCl3, 3BaSO4
(D) 3BaCl2, Al2(SO4)3, AlCl3, 3BaSO4
(A) Cu2NO3 + Ag, displacement reaction
(B) Cu(NO3)2 + 2Ag, displacement reaction
(C) 2Cu(NO3)2 + Ag, double displacement reaction
(D) CuNO2 + Ag, combination reaction
(A) Fe + 4HNO3 → Fe(NO3)3 + NO + 2H2O
(B) Fe + 4HNO3 → Fe(NO3)3 + NO2 + 2H2O
(C) Fe + HNO3 → 2Fe(NO3)2 + 3NO2
(D) Fe + 4HNO3 → FeNO3 + N2O + H2O
Answer keys:
(B)
(A) Valency of magnesium is 2 and of bromide ion is 1
(A) Valency of lead is 2 and sulphate is 2.
(A) Cuprous ion has valency 1 and cupric has 2, oxygen has valency 2. Formula of cupric oxide will be CuO or Cu2 O2
(D)
(A)
(C)
(B)
(A)