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Explain why: (1) Mercury loses its meniscus in contact with ozone. (2) Halogens are coloured and…
(i)
Explain why:
(1) Mercury loses its meniscus in contact with ozone.
(2) Halogens are coloured and the colour deepens on moving down in the group from fluorine to iodine.
(3) Hydride of sulphur is a gas while hydride of oxygen is a liquid.
(ii)
Complete and balance the following reactions:
(1) $\text{NaCl} + \text{MnO}_2 + \text{H}_2\text{SO}_4 \rightarrow$ _______ + _______ + ________ + _____
(2) $\text{KMnO}_4 + \text{SO}_2 + \text{H}_2\text{O} \rightarrow$ _______ + _______ + __________
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From ISC 2018 Chemistry Paper 1, question 17(b).