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- 1. Multiple Choice
What type of reactions can able to change products back to the their original form?
Reversible reactions
Irreversible reactions
Combustion reactions
Combination reactions
- 2. Multiple Choice
Which of the following changes is irreversible change?
Melting of ice cube
Heating hydrated CuSO4
Frying an egg
Thermal decomposing NH4Cl
- 3. Multiple Choice
Which of the following combination is correct?
reversible ⇌
irreversible →
reversible ←
irreversible →
reversible ⇌
irreversible ←
irreversible ⇌
reversible →
- 4. Multiple Choice
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
- 5. Multiple Choice
What is the symbol which is used in reversible reactions?
→
Δ
+
⇌
- 6. Multiple Choice
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.
- 7. Multiple Choice
Which of the following chemical reactions is reversible?
CH4 + O2 ⇌ CO2 + H2O
CuSO4.5H2O → CuSO4 + 5H2O
NH4Cl ⇌ NH3 + HCl
CaCO3 → CaO +CO2
- 8. Multiple Choice
Which of the following reactions is irreversible?
Thermal decomposition of ammonium chloride.
Heating hydrated copper sulfate.
Composition of ammonia gas from nitrogen and hydrogen gases.
Combustion of ethanol.
- 9. Multiple Choice
Which of the following reactions never goes completion in a closed container?
H2 + I2 ⇌ 2HI
C2H5OH + 3O2 → 2CO2 + 3H2O
NaOH + HCl → NaCl + H2O
CuSO4 + Zn → ZnSO4 + Cu
- 10. Multiple Choice
This symbol indicates that a reaction is ____________reversibleirreversible - 11. Multiple ChoiceWhich of these is NOT a reversible change?Water to IceJuice to ice lollyCookie Dough to CookieMelting Chocolate
- 12. Multiple Choice
Heating aqueous Copper sulfate gives
Black powder
Orange juice
White powder
Blue powder
- 13. Multiple Choice
What is a Reversible reaction
A reaction going forward and backward at same time
A reaction going forward and backward at different time
forward reaction
backward reaction
- 14. Multiple Choice
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
- Answer choicesTagsAnswer choicesTags