Chhattisgarh Board Solutions for Chapter: Matter : Nature and Behaviour, Exercise 1: Questions

$20\mathrm{g}$ 'A' and $40\mathrm{g}$ 'B' give $25\mathrm{g}$ 'C', $15\mathrm{g}$ 'D' and $20\mathrm{g}$ 'E' in a reaction. Use these observations to explain the law of conservation of mass.

Identify solutions, suspensions and colloids from among the given mixtures –

salt dissolved in water, mud in water, milk in water.

Which amongst the following mixtures will show Tyndall effect

sugar in water, ink in water, starch solution, salt solution.

$250\mathrm{g}$ of washing soda was dissolved in $1\mathrm{kg}$ of water. Find the concentration of the solution in terms of mass percentage.

When we add 1-2 drops of rice water (pasiya) in $100\mathrm{mL}$ water, what do we get a colloid or a suspension? Explain with reasons.

Group the following substances into elements or compounds: potassium, lime water, sulphur, washing soda, carbon, lead, vinegar.

We get a white powder when we burn magnesium ribbon in the air. Is this powder an element or a compound? Give reasons for your answer.

What is common salt – element, compound or mixture? Explain.