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In preparation of chlorine from HCl, $ MnO_2 $ acts as
In the preparation of chlorine from HCl, $MnO_2$ acts as an oxidizing agent. The reaction is: $$ 4HCl + MnO_2 \rightarrow MnCl_2 + Cl_2 + 2H_2O $$ Here, $MnO_2$ helps in the oxidation of HCl, releasing chlorine gas.
In KI solution$ I_2 $ readily dissolves & forms
$ KI + I_2 \rightarrow KI_3 $
When Cl is passed over dry slaked lime at room temperature, main reaction product is,
$ Ca(OH)_2 + Cl_2 \rightarrow CaOCl_2 + H_2O $
$ Br^– is converted to Br_2 $ by,
$ Cl_2 + 2Br ^- \rightarrow 2Cl ^ - + Br_2 $ .
Which reaction can't be used for production of halogen acid.
$ 2KBr + H_2SO_4 \rightarrow K_2SO_4 + 2HBr $
When cold NaOH reacts with $ Cl_2 $ it forms
$ 2NaOH + Cl_2 \rightarrow NaClO + NaCl + H_2O $
Which one is anhydride of HClO4
$ 2HClO_4 \rightarrow H_2O + Cl_2O_7 $
In dark, which of following reacts with Hydrogen?
$ H_2 + F_2 \rightarrow 2HF (anode) $
Electrolysis of a liquid resulted in formation of Hydrogen at cathode & $ Cl_2 $ at anode. Liquid is
$ 2NaCl + 2H_2O \rightarrow 2NaOH + Cl_2 + H_2 $ (cathode)
Manufacture of Bromine from sea water, the mother liquor containing bromides is treated with
$ Mg Br_2 + Cl_2 \rightarrow MgCl_2 + Br_2 $
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