S N Jha, Geeta Negi and, Neelima Jain Solutions for Chapter: Changes Around Us, Exercise 5: EXERCISES
S N Jha Science Solutions for Exercise - S N Jha, Geeta Negi and, Neelima Jain Solutions for Chapter: Changes Around Us, Exercise 5: EXERCISES
Attempt the free practice questions on Chapter 6: Changes Around Us, Exercise 5: EXERCISES with hints and solutions to strengthen your understanding. Science Success solutions are prepared by Experienced Embibe Experts.
Questions from S N Jha, Geeta Negi and, Neelima Jain Solutions for Chapter: Changes Around Us, Exercise 5: EXERCISES with Hints & Solutions
Match the items of column A with those of column B.
| Column A | Column B |
| 1. Batter to the cake | (a) Produces ash |
| 2. Irreversible change | (b) Chemical reaction |
| 3. Reversible change | (c) Rice grain to cooked rice |
| 4. Burning of paper | (d) Water to steam |
Write P if the sentence describes physical change or C if it describes a chemical change.
_____ We use detergent and bleach to wash clothes and remove the stains.
Write P if the sentence describes physical change or C if it describes a chemical change.
Modelling clay is shaped into a vase.
Write P if the sentence describes physical change or C if it describes a chemical change.
_____ Cream is whipped with air to make a whipped cream.
Write P if the sentence describes physical change or C if it describes a chemical change.
_____ Gasoline is burned in the car's engine.
Classify the following as reversible or irreversible changes (in tabular form):
Ripening of a fruit, burning of dry leaves, cooling of the air, melting of ice cream, baking a cake, dissolving sugar in water, blooming of flowers, development of a baby into an old man, bursting of a cracker.
On a cold day, Harish tried to open the metallic cup of an ink bottle. His mother told him to pour hot water on it. He poured hot water on the cap for a minute. Now the metallic cup opened easily. He surprised and asked this observation to his elder brother Ritesh. Being a student of science Ritesh explained such things properly.
Answer the following based on the above information.
Why it is easy to open metallic cap when warmed with water?
