Chemical Reactions And Equations Mock Tests

29 questions available

Chemical Reactions And Equations Mock Test 1

Questions: 29

Sample Questions

Class 10 Science

When a solution of potassium iodide (KI) is added to a solution of lead nitrate (Pb(NO₃)₂), a precipitate of colour X is formed. The colour X and the reaction type are respectively:

A Yellow, double displacement

B White, decomposition

C Blue, combination

D Green, displacement

Class 10 Science

Which of the following chemical equations correctly represents a displacement reaction?

A 2Mg + O₂ → 2MgO

B Zn + CuSO₄ → ZnSO₄ + Cu

C CaCO₃ → CaO + CO₂

D NaOH + HCl → NaCl + H₂O

Class 10 Science

The reaction between lead nitrate and potassium iodide produces:

A Yellow precipitate of lead iodide

B White precipitate of lead iodide

C Red precipitate of lead iodide

D No reaction occurs

Class 10 Science

Which of the following chemical reactions is an example of a decomposition reaction?

A 2Mg + O₂ → 2MgO

B CaCO₃ → CaO + CO₂

C Zn + CuSO₄ → ZnSO₄ + Cu

D HCl + NaOH → NaCl + H₂O

Class 10 Science

The reaction between lead nitrate and potassium iodide in solution produces:

A A white precipitate of lead iodide

B A yellow precipitate of lead iodide

C A blue precipitate of copper iodide

D No reaction

Class 10 Science

The reaction between hydrogen sulphide gas and chlorine gas is:

A H₂S + Cl₂ → 2HCl + S

B H₂S + Cl₂ → H₂Cl₂ + S

C 2H₂S + 3Cl₂ → 2HCl + 3SO₂

D H₂S + 2Cl₂ → 4HCl + S

Class 10 Science

A chemical equation can be balanced by adjusting the:

A Formulae of the compounds

B Coefficients of the compounds

C Subscripts of the elements

D Positions of the elements

Class 10 Science

Which of the following reactions is an example of a double displacement reaction?

A Mn + CuO → MnO + Cu

B CaO + SiO₂ → CaSiO₃

C Fe + CuSO₄ → FeSO₄ + Cu

D AgNO₃ + NaCl → AgCl + NaNO₃

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