This option is correct because sea weeds of lamanaria family react in iodine compound, these weeds are collected, dried, and burnt to obtain ash called Kelp.

This option is correct because Sb₂O₃ is treated with HF to form SbF₃. It is mild Lewis acid and is called as Swart's reagent.

This option is correct because when a little amount of mercury is poured into silver nitrate solution, a tree-like growth of silver amalgam is produced called mercury tree.

This option is correct because silver obtained from argintiferous lead still contains lead impurities. Thus, the lead is removed by silver.

This option is correct because the molten metal is taken out of the converter and is allowed to cool. This is dissolved in sulphur dioxide slowly given out by molten metal. It causes the blister on surface of metal. Hence, Cu obtained is called blister copper. It is an impure copper.

This option is correct because the salt cake, when heated with cold limestone dust, gives black ash.

This option is correct because the action of nitric acid on excess lime produces basic calcium nitrate. It is called Norwegian salt.

This option is correct because sodium carbonate and potassium carbonate are comprised in fusion mixture.

This option is correct because alkali metals and their salts impart colour when introduced in non-luminous flame of bunsen burner. The outer most electron of the metal goes into excited state due to absorption of the heat (energy). When these electrons return in ground state, they emit energy in the of the radiations of visible range, produced by a golden yellow colour.

This option is correct because sodium silicate is called as water glass.

This option is correct because silver chloride gives white precipitate when silver nitrate is dissolved in HCl. These precipitates are insoluble in nitric acid but dissolve in ammonium hydroxide.

This option is correct because tetrammine copper (II) sulphate is called as Schweitzer's reagent. It dissolves cellulose and is therefore, used in the manufacture of rayon.

This option is correct because this complex is called as fischer salt. It is a yellow powder which decomposes at melting point 200 ⁰C and used in medicine as yellow pigment.

This option is correct because when sulphur dioxide is present in the air, a layer of basic sulphate is formed and it is called as bronchanite.

This option is correct because the crystal of sodium carbonate are exposed to air to form a fine powder in which nine water molecules are exposed to air. It gives monohydrated sodium carbonate. These types of crystal are called as efflorescence.