2. Write the following word equations as formula equations and balance them. (i) Aimonium dichromate 4, Chromium (III) oxide + Water + Nitrogen (ii) Copper + dil. Nitric acid - Copper nitrate + Water + Nitric oxide (iii) Zinc + conc. Sulphuric acid — Zinc sulphate + Water + Sulphur dioxide (iv) Aluminium + Water + Caustic soda - Sodium metaaluminate + Hydrogen (v) Zinc hydroxide + Caustic soda solution Sodium zincate + Water (vi) Potassium chlorate 4 Potassium chloride + Oxygen (vii) Lead dioxide + conc. Hydrochloric acid - Lead chloride + Water + Chlorine (viii) Copper + dil. Nitric acid → Copper nitrate + Water + Nitric oxide (ix) Sodium chloride + conc. Sulphuric acid-Sodium hydrogen sulphate + Hydrogen chloride gas (x) Calcium hydroxide + dil. Hydrochloric acid - Calcium chloride + Water -
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To verify that if two parallel lines are cut by a transversal, then
i) each pair of corresponding angles are equal
ii) each pair of alternate interior angles are equal
iii) each pair of interior angles on the same side of transversal are supplementary
by paper cutting and pasting.
Materials Required: Sheets of white and coloured papers, a pair of scissors, glue,
carbon paper and a pencil/pen.
Explanation:
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