Chemical reaction and equations

A reaction in which one reactants break down into two or more products

• Displacement reaction

• Redox reaction

• Decomposition reaction

• Combination reaction

Which one of the following is an unbalanced equation

• Zn + H₂SO₂ -----> ZnSO₄ + H₂

• C + O₂ -----> CO₂

• NaCl + AgNO₃ -----> AgCl + NaNO₃

• BaCl₂ + H₂SO₂ -----> BaSO₄ + HCl

What will happen when iron nail is putted into copper sulphate solution

• Iron nail becomes brownish

• Iron nail remains as same

• Iron nail will get dissolve in the solution

• Blue colour of copper sulphate solution fades

Which type of reaction is this ?

• Double displacement reaction

• Decomposition reaction

• Redox reaction

• None of the Above

What are the types of decomposition reaction

• Thermal, oxidation,Photolytic

• Thermal,Photolytic,

  Electrolytic

• Endothermic,

  Exothermic,Reduction

• None of the above

Pb + CuCl2 → PbCl2 + Cu

The above reaction is an example of:

• combination reaction

• Double displacement

• Decomposition

• Displacement reaction

The process by which addition of oxygen takes place is called

• Oxidation reaction

• Reduction reaction

• Exothermic reaction

• Endothermic reaction

Reaction in which heat is given out is known as

• Thermal decomposition reaction

• Endothermic reaction

• Exothermic reaction

• Displacement reaction

Before burning in air, the magnesium ribbon is cleaned to:

• Make the ribbon surface shinier

• Remove the layer of magnesium oxide from the ribbon surface

• Remove the layer of magnesium carbonate from the ribbon surface

• Remove the moisture from the ribbon surface

The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of:

• Exothermic process

• Endothermic process

• Physical process

• Reversible process