Collect different flowers and prepare their natural indicators with the help of filter paper.

Test the following salt substances with red litmus and blue litmus papers. Record your observations in the table.

How can you prepare turmeric indicator ? What is the use of it ?

Collect some salt substances with the help of your teacher. Make their salt solutions. Test the salt solutions with blue litmus and red litmus papers. Classify these salts and record your observations in the table.

Can flowers and turmeric papers also be called as indicators. Why?

Which of the following is/are true about indicators ? (i) Hibiscus and turmeric papers are examples for natural indicators (ii) Phenolpthalein and Methyl orange are examples for Synthetic indicators (iii) Indicators show different colours in acidic and basic solutions (iv) These tell us whether a substance is acidic or basic

Test the nature of lemon juice and milk sample with the help of natural indicators prepared from different flowers. Explain their nature.

Collect the salt samples like sodium chloride, aluminium chloride, copper sulphate, sodium acetate, ammonium chloride, sodium hydrogen carbonate and sodium carbonate. Dissolve them in distilled water. Check the action of these solutions with litmus papers. Find the pH using pH paper. Classify them into acidic, basic or neutral salts. Identify the acid and base used to form the above salts. Record your observations in table

Test the pH value of solutions given in table. Record your observations in the three colu.pm of table. Write approximate pH value using in using universal indicator solution. What is the nature of each substance on the basis of your observations ?

A tomato, brinjal, potato, iron nail, sponge, wood, stone, leaf, piece of chalk and paper are given. Predict which of them sink or float in water. Record your predictions in table.