How do the water (aqueous) solutions of Magnesium oxide and calcium oxide respond to litmus paper ? How would you classify them ?

What do you get by dissolving magnesium oxide in water?

Plants also respond to external stimuli. How do you feel about this ?

You are provided with three test tubes containing distilled water, an acid and a base solution respectively. If you are given only blue litmus paper, how do you identify the contents of each test tube ?

What are the different types of fibres? Where do they come from? How do you classify them?

Suppose lemon are given to you how would you preserve them?

Suppose fish are given to you how would you preserve them?

Suppose raw mango are given to you how would you preserve them?

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

Oxides of magnesium dissolved in water forms ___ solution.

How do calcium phosphide and heavy water react ?