Telangana Board Solutions for Chapter: Is Matter Pure?, Exercise 8: Exercise 8

Classify the following into elements, compounds and mixture.

Methane

Classify the following into elements, compounds and mixtures.

Carbon dioxide

Classify the following into element, compound or mixture.

Seawater

Determine the mass by mass percentage concentration of a $100\mathrm{g}$ salt solution which contain $20 \mathrm{g}$ salt?

Calculate the concentration in terms of mass by volume percentage of the solution containing $2.5\mathrm{g}$ potassium chloride in $50 \mathrm{ml}$ of potassium chloride $\left(\mathrm{KCl}\right)$ solutions?

Classify the following substances in the given table.

Ink, soda water, brass, fog, blood, aerosol sprays, fruit salad, black coffee, oil and water, boot polish, air, nail polish, starch solution, milk.

How would you confirm that a colourless liquid given to you is pure water?

Write the steps you would use for making tea. Use the words given below and write the steps for making tea.

Solution, solvent, solute, dissolve, soluble, insoluble, filter and residue.