MCQGeeks
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Science
Reversible And Irreversible Reaction
Quiz 1
Solution
Q.1.
What is the symbol which is used in reversible reactions?
→
Δ
+
⇌
Q.2.
What are the names of the ways a liquid changes to a gas
Evaporation
Boiling
Condensation
Both A & B
Q.3.
Which of the following is a sign that a chemical reaction has occurred?
change in shape
melting
formation of a gas
dissolving
Q.4.
To put out a fire, we need to
Remove one of the elements of the fire triangle.
Call the ambulance.
Run away.
All of above
Q.5.
Water can't be used on
Wood.
Paper.
Flammable liquids, like oil.
All of above
Q.6.
Fuels are _____ that are very good at burning.
Substances
Cars
Q.7.
Irreversible changes can also be called
Physical changes
Chemical changes
Q.8.
Reversible changes are also called
Physical changes
Chemical changes
Q.9.
A ______ change can be undone and generally refers to a change of state.
Reversible
Irreversible
Q.10.
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
Q.11.
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
Q.12.
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.
Q.13.
Which of the following changes is irreversible change?
Melting of ice cube
Heating hydrated CuSO4
Frying an egg
Thermal decomposing NH4Cl
Q.14.
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
Q.15.
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.
Q.16.
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
Q.17.
When amounts of reactants and products become constant in reversible reaction, what might happen to the reversible reaction?
Reversible reaction reaches equilibrium.
Reversible reaction fastens forward reaction.
Reversible reaction fastens reverse reaction.
Reversible reaction slows down forward reaction.
Q.18.
Which of the following chemical reactions is reversible?
CH4 + O2 ⇌ CO2 + H2O
CuSO4.5H2O → CuSO4 + 5H2O
NH4Cl ⇌ NH3 + HCl
CaCO3 → CaO +CO2
Q.19.
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
Q.20.
Which of the following combination is correct?
reversible ⇌irreversible →
reversible ←irreversible →
reversible ⇌irreversible ←
irreversible ⇌reversible →
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page