An ……….. is drawn in between the reactants and products while writing the equation for a chemical reaction.

Question

Complete the statement by filling the gaps using appropriate term from the terms given in the brackets: 

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

(i) An ……….. is drawn in between the reactants and products while writing the equation for a chemical reaction.

(ii) Rusting of iron is a ……….. chemical change.

(iii) The spoiling of food is a chemical change which is recognized from the generation of certain …………. due to it.

(iv) A colourless solution of calcium hydroxide in a test tube turns ………….. on blowing in it through a blow tube for some time.

(v) The white particles of baking soda disappear when put in lemon juice. This means that it is a ……….. change.

(vi) Oxygen is a …………….. in respiration.

(vii) Sodium chloride is …………… compound while hydrogen chloride is compound.

(viii) Electron …………….. is complete in each hydrogen in a hydrogen molecule.

(ix) Chlorine (Cl₂) molecule is formed by ………….. of electrons between two chlorine atoms.

Answer 1

(i) An arrow is drawn in between the reactants and products while writing the equation for a chemical reaction.

(ii) Rusting of iron is a slow chemical change.

(iii) The spoiling of food is a chemical change which is recognized from the generation of certain smell due to it.

(iv) A colourless solution of calcium hydroxide in a test tube turns milky on blowing in it through a blow tube for some time.

(v) The white particles of baking soda disappear when put in lemon juice. This means that it is a chemical change.

(vi) Oxygen is a reactant in respiration.

(vii) Sodium chloride is ionic compound while hydrogen chloride is covalent compound.

(viii) Electron duplet is complete in each hydrogen in a hydrogen molecule.

(ix) Chlorine (Cl₂) molecule is formed by sharing of electrons between two chlorine atoms.