Chemical reaction and equations worksheet-6

Chemical reaction and equations worksheet-6

 

Multiple Choice Questions:

  1. What is the chemical formula -Calcium ion and bicarbonate ion

(A) Ca2+ HCO32–   (B) Ca+ HCO3      (C) Ca2+ HCO3     (D) Ca+ HCO32–

(E) Ca3+ HCO32–

 

  1. What is the chemical formula of -Magnesium ion and bromide ion -

(A) Mg2+ Br         (B) Mg+ Br           (C) Mg2+ Br2–       (D) Mg3+ Br

(E) Mg+ Br

 

  1. What is the chemical formula of -Lead sulphate

(A) PbSO4            (B) Pb(SO4)2            (C) Pb2SO4            (D) Pb(SO4)3

 

  1. What is the chemical formula of -Cuprous oxide

(A) Cu2O              (B) CuO                     (C) CuO2                 (D) Cu2O2

 

  1. What will be the coefficients on the reactant and product side in the balanced chemical equation of  given chemical equation

H2S + O2 → SO2 + H2O

(A) H2S, 3O2, 2SO2, 2H2O                 (B) 2H2S, 3O2, 2SO2, 2H2O

(C) 2H2S, 3O2, 2SO2, H2O                 (D) 2H2S, 3O2, 2SO2, 2H2O

 

  1. What will be the coefficients on the reactant and product side in the balanced chemical equation of  given chemical equation

Na + H2O → NaOH + H2

(A) 2Na, 2H2O, 2NaOH, H2              (B) Na, 2H2O, NaOH, H2

(C) 2Na, 2H2O, 2NaOH, H2              (D) 2Na, H2O, NaOH, H2

 

  1. What will be the coefficients on the reactant and product side in the balanced chemical equation of  given chemical equation

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

 

  1. Complete the  equation, what type of reaction it is -Cu + 2AgNO3

(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

 

  1. Complete the chemical equation- Fe + HNO3(conc.)

(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:

  1. (B)

  2. (A) Valency of magnesium is 2 and of bromide ion is 1

  3. (A) Valency of lead is 2 and sulphate is 2.

  4. (A) Cuprous ion has valency 1 and cupric has 2, oxygen has valency 2. Formula of cupric oxide will be CuO or Cu2 O2

  5. (D)

  6. (A)

  7. (C)

  8. (B)

  9. (A)