Match items of Column I with the items of Column II and assign the correct code: `{:(ColumnI,ColumnII),((A)"Cyanide process",(1)"Ultrapure Ge"),((B)"F

Question

Match items of Column I with the items of Column II and assign the correct code: `{:(ColumnI,ColumnII),((A)"Cyanide process",(1)"Ultrapure Ge"),((B)"F

Match items of Column I with the items of Column II and assign the correct code:
`{:(ColumnI,ColumnII),((A)"Cyanide process",(1)"Ultrapure Ge"),((B)"Froth Floatation Process",(2)"Dressing of"ZnS),((C)"Electrolytic reduction",(3)"Extraction of Al"),((D)"Zone refining",(4)"Extraction of Au"),(,(5)"Purification of Ni"):}`
A. I-(c ), II-(a), III-(d), IV-(b)
B. I-(d), II-(b), III-(c ), IV-(a)
C. I-(c ), II-(b), III-(d), IV-(a)
D. I-(d), II-(a), III-( c ), IV-(b)

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Related Questions

Match Column I with Column Il and choose the correct options: Column I: Column II (I) Andhra Pradesh: (A)Kuruwa

2 Answers 9 Views

Match the transformation in column I with appropriate option in column II `{:(,"Column I",,"Column II"),((A),CO_(2)(s) rarr CO_(2) (g),(p),"phase tran

2 Answers 6 Views

Match the column-I with Column - II Note that column- I may have more than one matching options in column-II. `{:(,"Column-I" , "Column-II",),(("A"),"

2 Answers 5 Views

Match the pair of complexes given in Column-I and the characteristic given in column-II. `{:("Column-I","Column-II"),((A)(NH_4)_2[NiCl_4] and (NH_(4))

2 Answers 5 Views

Statement-1:In cyanide process for the extraction of gold and silver from their native ores, the cyanide solution acts as a reducing agent to reduce t

2 Answers 4 Views

Match the following considering the reaction of `CH_3MgBr` with the compounds in column A and products as written in column B. `{:("Column I","Column

2 Answers 4 Views

Match the salts listed in column I with the colour of the precipitate and reagent listed in column II. `{:("Column I","Column II"),((A)FeSO_4,(p)"Gree

2 Answers 5 Views

Match column `I` with column `II` for housefly classification and select the correct option using the codes given below `{:(,"Column I",,"Column II"),

2 Answers 5 Views

Match the disease in Column I with the appropriate items (pathogen/prevention/treatment) in Column II: `{:("Column-I","Column-II"),(A" Amoebiasis",1"

2 Answers 4 Views

Match the terms in column I with their description in column II and choose the correct option. `{:(,"Column I",,"Column II"),("A.","Dominance",1.,"Man

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - B
(I)`4Au//Ag(s)+8CN^(-)(aq)+2H_2O(aq)+O_2(g) to 4[Au//Ag(CN)_2]^(-)(aq)+4OH^(-)(aq)`
`2[Au//Ag (CN)_2]^(-)(aq)+Zn(s)to2Au//Ag(s)+[Zn(CN)_4]^(2-)(aq)`
(II)This method is based on the fact that gangue and ore particles have different degree of wettability with water and pine oil, the gangue particles are preferentially wetted by water while the ore particles are wetted by oil.
(III)Electrolytic reduction (Hall-Heroult process) :
The purified `Al_2O_3` is mixed with `Na_3AIF_5`(cryolite) or `CaF_2` (fluorspar) which lowers the melting point of the mixture and increases conductivity. The fused matrix is electrolysed. the electrolytic reactions are :
Cathode: `Al^(3+)` ("melt")+`3e^(-) to A(l)`
`C(s)+2O^(2-)("melt")toCO_2(g)+4e^(-)`
(IV) This process is used when metals are reqired in very high purity , for specific application. For example pure Si and Ge are used in semiconductors and hence are purified by this method.Zone refining method is based on the principle that an impure molten metal on gradual cooling will deposit crystals of the pure metal. while the impurities will be left in the remaining part of the molten metal.