MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Extraction of Aluminium

In the extrac...

Question

In the extraction of silver, some lead is also present as an impurity in the final step. This lead can be removed by process, which is/are:

A

cupellation process

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

froth flotation

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

parkes or pattinson process

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

none of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C parkes or pattinson process
The Parkes process is a pyrometallurgical industrial process for removing silver from lead during the production of bullion. It is an example of liquid extraction.
The process takes advantage of two liquid-state properties of zinc. The first is that, zinc is immiscible with lead and the other is that silver is 3000 times more soluble in zinc than it is in lead.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Lead as impurity in the extraction of silver is removed by :

Predict if the method to remove the following impurities is true or false.

An impurity of lead in silver: Cupellation

Q. The following questions refer to the extraction of aluminium and iron from their ores:
(a) Name the principle ore from which (i) iron, and (ii) aluminium are extracted.
(b) What is the most important chemical process in the extraction of any metal? State how this essential step is carried out in the extraction of: (i) iron, (ii) aluminium.
(c) Iron and aluminium ores both, contain impurities. Explain, briefly how these impurities are removed in each case.
(d) What is the major impurity present in iron when it is removed from the furnace?
Name an alloy of zinc is used in simple voltaic cells.

Q. Lead obtained from galena ore (PbS) by air reduction or carbon reduction process contains base metal (Cu, Bi, As, Sn, Zn) as impurities. The removal of the impurity of Ag from the commercial lead is called:

Q. Complexes formed in the following methods are–
(I) Mond's process for purification of nickel
(II) Removal of unreacted AgBr from photographic plate
(III) Removal of lead poisoning from the body
(IV) Cyanide process for extraction of silver
(V) Froth floatation process for separation of ZnS from galena ore by using depressant.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Metallurgy of Aluminium

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Extraction of Aluminium

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon