Kerala Board Solutions for Chapter: Solutions, Exercise 9: Let us assess
Kerala Board Science Solutions for Exercise - Kerala Board Solutions for Chapter: Solutions, Exercise 9: Let us assess
Attempt the practice questions on Chapter 4: Solutions, Exercise 9: Let us assess with hints and solutions to strengthen your understanding. Science for Class 8 - Part 2 solutions are prepared by Experienced Embibe Experts.
Questions from Kerala Board Solutions for Chapter: Solutions, Exercise 9: Let us assess with Hints & Solutions
Given below are some solutions. Identify and write down the solvent and the solute present in them. (Hint: Those present in large amount is the solvent and that in small amount is the solute).
| Solution | Solvent | Solute |
| Salt water | ||
| Ornamental gold | ||
| Soda water | ||
| Dilute hydrochloric acid |
Haven’t you noticed the caption “Shake well before use” in certain medicine bottles?
(a) To which class does the substances in them belong? (Colloid, Solution, Suspension)
(b) What is the relevance of such instructions on these bottles?
Given below are some activities and observations done by a student using samples of dilute rice water, saltwater, and muddy water.
| Activity | Observation | ||
| Muddy water | Salt water | Dilute rice water | |
| Passing a beam of light | _____ | Path of the beam of light is not visible | _____ |
| Filtering using a filter paper | Components can be separated by filtration | _____ | |
| Keeping undisturbed for some time | _____ | _____ | Particles do not settle down |
a) Complete the table with the missing observations.
b) Classify these samples into solution, colloid, and suspension.
There are numerous instances in daily life where solutions are being used. Tabulate some of them.
You are now familiar with different types of solutions. What is the difference between saturated and supersaturated solutions?
You are now familiar with different types of solutions. How will you prepare a supersaturated solution of common salt?
You are now familiar with different types of solutions. Unsaturated and saturated solutions of copper sulphate are prepared in separate beakers and a crystal of copper sulphate is dipped into each one of them. What would be the observation after a day? Give reason.
Classify and tabulate the mixtures given below into solution, colloid and suspension:
Milk, fog, atmospheric air, dilute acid, lime water, ink, smoke.
