Kerala Board Solutions for Chapter: Chemical Changes, Exercise 4: Exercise 4
Kerala Board Science Solutions for Exercise - Kerala Board Solutions for Chapter: Chemical Changes, Exercise 4: Exercise 4
Attempt the practice questions on Chapter 6: Chemical Changes, Exercise 4: Exercise 4 with hints and solutions to strengthen your understanding. Science for Class 8 - Part 1 solutions are prepared by Experienced Embibe Experts.
Questions from Kerala Board Solutions for Chapter: Chemical Changes, Exercise 4: Exercise 4 with Hints & Solutions
Take some silver bromide in two dry watch glasses. Wrap one of them with a black paper. Keep both of them in sunlight for some time.
- What do you observe?
- In which watch glass does the colour of silver bromide change?
- Which form of energy was responsible for this chemical change?
What could be the reason for storing certain medicines and chemicals in brown bottles? Think of it.
Set up the apparatus. What changes do you observe when electricity is passed through the circuit?
• In the colour of copper sulphate solution:
• On the carbon rods.
• Does it happen if a carbon rod is simply kept in copper sulphate solution? Which form of energy was responsible for this chemical change? Was the energy liberated or absorbed?
