Chapter 15: Reversible & Irreversible Changes - Science For Grade 6(Science ) Questions and Answers

Question 1. Raw egg is completely different in shape, color, taste, smell from
  1.    boiled egg
  2.    fried egg
  3.    both a and b
  4.    organic egg
Explanation:-
Answer: Option C. -> both a and b
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Heat gain makes the ice to
  1.    freeze
  2.    evaporate
  3.    melt
  4.    dissolve
Explanation:-
Answer: Option C. -> melt
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. Burnt sparklers and burnt books pages are examples of
  1.    reversible
  2.    irreversible
  3.    same
  4.    constant
Explanation:-
Answer: Option B. -> irreversible
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. The gas release on mixing fruits salt with water is
  1.    oxygen
  2.    nitrogen
  3.    carbonmono oxide
  4.    carbon dioxide
Explanation:-
Answer: Option D. -> carbon dioxide
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. Iron adopts changes slowly and gradually by process of
  1.    rusting
  2.    moldings
  3.    fermentation
  4.    explosions
Explanation:-
Answer: Option A. -> rusting
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. Formation of gas from any liquid on boiling is due to
  1.    water
  2.    heat
  3.    pressure
  4.    density
Explanation:-
Answer: Option B. -> heat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Changes in matter can be observed upon
  1.    separating
  2.    filtering
  3.    mixing
  4.    heating
Explanation:-
Answer: Option C. -> mixing
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. To fry or boil an egg we need
  1.    pan
  2.    heat
  3.    water
  4.    match stick
Explanation:-
Answer: Option B. -> heat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. Liquid water evaporate or boil to turn into water vapor and steam by gaining
  1.    water
  2.    heat
  3.    pressure
  4.    density
Explanation:-
Answer: Option B. -> heat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Oil and gas catch fire
  1.    easily
  2.    slowly
  3.    not at all
  4.    extinguisher
Explanation:-
Answer: Option A. -> easily
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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