Classification of Chemical Reactions Super Review

Which of the following is not a chemical reaction?

• Souring of milk

• Dissolution of sugar in water

• Rusting of iron

• Digestion of food in our body

Which of the following is not a thermal decomposition reaction

• 2FeSO₄ →Fe₂O₃ +SO₂ + SO₃

• 2H₂O→2H₂ + O₂

• ZnCO₃→ZnO + CO₂

• 2KClO₃→2KCl + 3 O₂

Combustion is an .................Process

• Endothermic

• Exothermic

• Both (a) and (b)

• None of the above

Which of the following is an example of displacement reaction?

• 2 KClO₃→KCl + O₂

• 2H₂ + O₂ →2 H₂O

• Zn + 2 HCl → ZnCl₂ + H₂

• N₂ + 3 H₂ → 2 NH₃

Burning of magnesium ribbon is a

• Chemical reaction

• Exothermic reaction

• A white color powder forms

• All of these

The symbol for a substance dissolved in solution is ______

• (s)

• (l)

• (aq)

• (g)

Predict the products of this synthesis reaction: H₂ + Cl₂ →

• HCl

• H₂Cl₂

• H₂Cl

• HCl₂

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO₃ → Ag + _____

• Cu(NO₃)₂

• CuNO₃

• CuAg

• Cu

What type of reaction is this?

2 C₆H₁₄ + 19 O₂ → 12 CO₂ + 14 H₂O

• Single Replacement

• Double Replacement

• Combustion

• Decomposition

Predict the products for the this Single Replacement reaction:

K + HCl →

• KCl + H₂

• KHCl

• KH + Cl₂

• HCl + K₂