Reversible And Irreversible Reaction(General Knowledge > General Science ) Questions and Answers

Question 1. What is a liquid?
  1.    Liquids have their own shape and size.
  2.    Liquids take the shape of their container.
  3.    Liquids spread out to fill space.
  4.    All of above
Explanation:-
Answer: Option B. -> Liquids take the shape of their container.
Question 2. When you burn logs from trees, is that change reversible or irreversible?
  1.    reversible
  2.    irreversible
Explanation:-
Answer: Option B. -> irreversible
Question 3. Ms
  1.    reversible
  2.    irreversible
Explanation:-
Answer: Option B. -> irreversible
Question 4. Which of these is NOT a reversible change?
  1.    Water to Ice
  2.    Juice to Popsicle
  3.    Cookie Dough to Cookie
  4.    Melting Chocolate
Explanation:-
Answer: Option C. -> Cookie Dough to Cookie
Question 5. When you cook pancakes, is the change reversible or irreversible?
  1.    reversible
  2.    irreversible
Explanation:-
Answer: Option B. -> irreversible
Question 6. Which of the following reactions never goes completion in a closed container?
  1.    H2 + I2 ⇌ 2HI
  2.    C2H5OH + 3O2 → 2CO2 + 3H2O
  3.    NaOH + HCl → NaCl + H2O
  4.    CuSO4 + Zn → ZnSO4 + Cu
Explanation:-
Answer: Option A. -> H2 + I2 ⇌ 2HI
Question 7. What is a solid?
  1.    Solids have their own shape and size.
  2.    Solids take the shape of their container.
  3.    Solids spread out to fill space.
  4.    None of these
Explanation:-
Answer: Option A. -> Solids have their own shape and size.
Question 8. Which of the following reactions is irreversible?
  1.    Thermal decomposition of ammonium chloride.
  2.    Heating hydrated copper sulfate.
  3.    Composition of ammonia gas from nitrogen and hydrogen gases.
  4.    Combustion of ethanol.
Explanation:-
Answer: Option D. -> Combustion of ethanol.
Question 9. When you boil water on the stove, is the change reversible or irreversible?
  1.    reversible
  2.    irreversible
Explanation:-
Answer: Option A. -> reversible
Question 10. Which of the following changes is irreversible change?
  1.    Melting of ice cube
  2.    Heating hydrated CuSO4
  3.    Frying an egg
  4.    Thermal decomposing NH4Cl
Explanation:-
Answer: Option C. -> Frying an egg
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