Consider the following statements - In the aluminothermite process, aluminium acts as reducing agent. The process of extraction of gold involves the formation of [Au(CN)_2 ]^(-)and [Zn(CN)_4 ]^(2-) In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called sintering and reduction of ore to the molten metal is called smelting.Extractive metallurgy of silver from its ore argentite involves complex formation and displacement by more electropositive metal. Choose the correct options -

Consider the following statements - In the aluminothermite process, al

1.	Consider the following statements - In the aluminothermite process, aluminium acts as reducing agent. The process of extraction of gold involves the formation of [Au(CN)_2 ]^(-)and [Zn(CN)_4 ]^(2-) In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called sintering and reduction of ore to the molten metal is called smelting.Extractive metallurgy of silver from its ore argentite involves complex formation and displacement by more electropositive metal. Choose the correct options -
Answer» A and B B and C A, B and C A, B, C and D SOLUTION :`(A )Cr_2O_3 + 2AltoAl_2O_3+ 2Cr ` `(b )Au+ 2CN^(-) +H_2O + 1/2O_2to[ Au(CN)_2 ]^(-) + 2 OH^(-)` `2[Au(CN )_2]^(- )+ zn to[Zn (CN)_4 ]^(2- )+ 2Au` (c )STATEMENTIS true 9 (D )`Ag_2 S + 4 NaCN overset( O_2 ) to2Na[Ag (CN)_2 ] +Na _2 S ` ` 2Na[Ag(CN)_2 ]+Znto[Zn(CN )_4 ]+2Ag `