NCERT Solutions for Chapter: Physical and Chemical Changes, Exercise 3: SHORT ANSWER QUESTIONS
NCERT Science Solutions for Exercise - NCERT Solutions for Chapter: Physical and Chemical Changes, Exercise 3: SHORT ANSWER QUESTIONS
Attempt the practice questions on Chapter 6: Physical and Chemical Changes, Exercise 3: SHORT ANSWER QUESTIONS with hints and solutions to strengthen your understanding. NCERT Exemplar Science - Class 7 solutions are prepared by Experienced Embibe Experts.
Questions from NCERT Solutions for Chapter: Physical and Chemical Changes, Exercise 3: SHORT ANSWER QUESTIONS with Hints & Solutions
Match the items of column I with the items of column II.
| Column I | Column II |
| (a) Large crystals | (i) Turns lime water milky |
| (b) Deposition a layer of zinc on iron | (ii) Physical change |
| (c) Souring of milk | (iii) Rust |
| (d) Carbon dioxide | (iv) Sugar candy (Mishri) |
| (e) Iron oxide | (v) Chemical change |
| (f) Dissolving common salt in water | (vi) Galvanisation |
Classify the following process into physical or chemical change:
Beating of aluminium metal to make aluminium foil.
Classify the following process into physical or chemical change:
Digestion of food.
Classify the following process into physical or chemical change:
Cutting of a log of wood into pieces.
Classify the following process into physical or chemical change:
Burning of crackers.
Write word equations for two chemical reactions with the help of materials given in the box.
[Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water]
Explain the following:
Lime water turns milky on passing carbon dioxide gas into it.
Explain the following:
Bubbles are produced when acetic acid is added to a solution of sodium hydrogen carbonate.
