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Explanation

Q 119     Sucrose is glucose linked to fructose by a glycosidic bond from the carbon 1 of the glucose to carbon 2 of fructose. The formation of this bond involves the elimination of water from two - OH groups to produce one - O- linkage. Thus if glucose is C₆H₁₂O₆ and fructose is C₆H₁₂O₆, sucrose is C₁₂H₂₂O₁₁ and not C₁₂H₂₄O₁₂.

Q 132     Oxygen is O=O
Q 133     Carbon dioxide dissolves in water to produce an acidic solution.
Q 134     Nitrogen is N₂, therefore one mole of it contains 12 × 10²³ atoms of nitrogen.
Q 135     Addition of H₂ to a double bond. Remember OILRIG.
Q 136     Removal of H₂ to form a double bond. Remember OILRIG.
Q 137     Addition of water to a double bond.
Q 140     Hydrolysis of the glycosidic bond from question 119.