question_answer 1)

Write down the formulae of following compounds: (a) Mercury (II) chloride (b) Nickel (II) sulphate (c) Tin (IV)oxide (d) Thallium (I) sulphate (e) Iron (III) sulphate (f) Chromium (III) oxide  

Answer:

(a) \[HgC{{l}_{2}}\](b) \[NiS{{O}_{4}}\] (c)\[Sn{{O}_{2}}\] (d) \[{{T}_{2}}{{l}_{2}}OS{{O}_{4}}\] (e) \[F{{e}_{2}}{{(S{{O}_{4}})}_{3}}\](f) \[C{{r}_{2}}{{O}_{3}}\]