EXERCISE
Subject Experts Chemistry Solutions for EXERCISE
Simple step-by-step solutions to EXERCISE questions of Physical And Chemical Changes from Foundation Course Chemistry. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from EXERCISE with Hints & Solutions
_____ is the process of depositing a layer of zinc on iron to prevent the iron from rusting.
When magnesium is burnt, a new substance _____ is formed.
Give three reasons why the melting of wax is considered a physical change while burning a candle is a chemical change.
In this section, each question has two matching lists. Choices for the correct combination of elements from List-I and List-II are given as options (a), (b), (c) and (d) out of which one is correct.
| List-I | List-II |
| (P) Burning of coal | 1. Rusting |
| (Q) Painting of a surface | 2. Evaporation |
| (R) Dipping iron in water | 3. Chemical change |
| (S) Salt from sea water | 4. Prevention of rusting |
In this section, each question has two matching lists. Choices for the correct combination of elements from List-I and List-II are given as options (a), (b), (c) and (d) out of which one is correct.
| List-I | List-II |
| (P) Change in temperature | 1. Magnesium reacting with dilute sulphuric acid |
| (Q) Evolution of a gas | 2. Potassium iodide reacting with lead nitrate |
| (R) Formation of a precipitate | 3. Sulphur dioxide gas reacting with acidified potassium dichromate solution |
| (S) Change in colour | 4. Zinc granules reacting with dilute sulphuric acid |
Why does stainless steel not rust?
What kind of change is digestion of food?
In which type of change a new substance is formed?
