6.3 Reversible reactions

What type of reactions can able to change products back to the their original form?

• Reversible reactions

• Irreversible reactions

• Combustion reactions

• Combination reactions

Which of the following combination is correct?

• reversible ⇌

  irreversible →

• reversible ←

  irreversible →

• reversible ⇌

  irreversible ←

• irreversible ⇌

  reversible →

If a reversible reaction is exothermic in the forward direction, it will be ...

• exothermic in the reverse direction

• endothermic in the forward direction too

• endothermic in the reverse direction

• not involve energy in reverse direction

What is the symbol which is used in reversible reactions?

• →

• Δ

• +

• ⇌

Which of the following reactions never goes completion in a closed container?

• H_{2 +} I₂ ⇌ 2HI

• C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O

• NaOH + HCl → NaCl + H₂O

• CuSO₄ + Zn → ZnSO₄ + Cu

Heating aqueous Copper sulfate gives

• Black powder

• Orange juice

• White powder

• Blue powder

What is a closed system

• It gives out energy

• The reactants and the products do not escape from reaction mixture

• It takes in energy

• The reactants and the products escape from he reaction mixture to be kept in the system

In an exothermic reaction, heat is ...

• taken in
• given out

The ______________is required to break the bonds of the reactants.

• Carbonic energy

• Activation energy

• Plutonic energy

• Energi Gaib

Why don't all collisions between particles cause a reaction?

• the particles also need to collide with a catalyst
• not all the particles collide with enough energy
• not all the particles collide at a high enough temperature
• the particles need to collide with each other twice