Reversible reactions and equilibrium

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

Tags

NGSS.HS-PS1-4

What is the symbol which is used in reversible reactions?

• →

• Δ

• +

• ⇌

Why is a reaction described as irreversible?

• The products cannot be turned directly back into the reactants.

• You need to apply heat to make the reaction work.

• The products can be turned back into the reactants.

• The reactants cannot be turned into the products.

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

Tags

NGSS.HS-PS3-4

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse and concentrations are equal
• Forward and reverse reaction rates are equal and concentration is conctant
• Forward and revers reaction rates are equal and concentration is equal
• Forward reaction rate is faster than the reverse and concentration is equal

Tags

NGSS.HS-PS1-6

Identify the incorrect statement about achieving equilibrium.

• achieved when product and reactant concentrations are equal

• achieved when forward and reverse reaction rates are same

• achieved when concentration of reactants is stable/constant

• achieved when concentration ratio of reactants to products becomes stable, thus fixing the equilibrium constant (equilibrium position)

Tags

NGSS.HS-PS1-6

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

Tags

NGSS.HS-PS1-6

What are the usual conditions of the Haber Process

• 450'C, 550 atm, Iron Catalyst

• 100'C, 200 atm, Diamond Catalyst

• 450'C, 250 atm, Iron Catalyst

• -450'C, 250 atm, Iron Catalyst