Changes around us Worksheet-8
Multiple-Choice Question:
(A) A physical change is always an irreversible change
(B) A chemical change is always a reversible change
(C) Both of these
(D) None of these
(A) Physical (B) Chemical (C) No
(A) It’s a reversible change (B) It’s an irreversible change
(C) None of these
(A) It’s an irreversible change (B) It’s a reversible change
(C) None of these
(A) None of these (B) A chemical change
(C) A physical change
(A) It is a physical and irreversible change
(B) It is a chemical and reversible change
(C) It is a physical and reversible change
(D) It is a chemical and irreversible change
(A) Irreversible change (B) None of these
(C) Reversible change
Comprehension:
Take 100 ml of water and some amount of salt. Gradually add the salt to the liquid until it has completely dissolved and a saturated solution is formed. Take four saucers and put about 30 ml of this saturated solution in each one. Place one saucer (a) on a sunny window sill, (b) one near the heated and (c) one on a shelf away from the sunlight. Cover the fourth saucer with a plate and place it anywhere in the room. Answer the following questions on the basis of observation after one week.
Answer Key:
