Podcast
Questions and Answers
What is the primary purpose of passing an excess of air through the solution in the extraction of silver?
What is the primary purpose of passing an excess of air through the solution in the extraction of silver?
- To separate Zn-Ag alloy from molten Pb
- To purify the silver alloy
- To reduce AgNO3 to metallic silver
- To oxidize Na2S into sulphate and thiosulphate (correct)
What is the significance of Zn being volatile in Parke's Process?
What is the significance of Zn being volatile in Parke's Process?
- It helps in the separation of Ag from Pb (correct)
- It helps in the purification of silver
- It increases the solubility of Ag in molten Zn
- It allows for the formation of a Zn-Ag alloy
What is the composition of the silver alloy used for making jewelry?
What is the composition of the silver alloy used for making jewelry?
- 80% Ag and 20% Cu (correct)
- 70% Ag and 30% Cu
- 90% Ag and 10% Cu
- 80% Ag and 20% Zn
What is the purpose of cupellation in the purification of silver?
What is the purpose of cupellation in the purification of silver?
What is the use of AgNO3 in the preparation of ink and hair dyes?
What is the use of AgNO3 in the preparation of ink and hair dyes?
What is the product of the decomposition of silver nitrate when heated above its melting point?
What is the product of the decomposition of silver nitrate when heated above its melting point?
Which silver halide is soluble in water?
Which silver halide is soluble in water?
What is the name of the pigment formed from the reaction of silver nitrate with NH4OH?
What is the name of the pigment formed from the reaction of silver nitrate with NH4OH?
What happens when silver oxide is treated with ammonium hydroxide?
What happens when silver oxide is treated with ammonium hydroxide?
What is the ore from which silver is extracted?
What is the ore from which silver is extracted?
What is the product of the reaction of silver chloride with KCN?
What is the product of the reaction of silver chloride with KCN?
What is the purpose of blowing air in the extraction of silver using the cyanide process?
What is the purpose of blowing air in the extraction of silver using the cyanide process?
What is the nature of the complex formed when silver reacts with alkali cyanides?
What is the nature of the complex formed when silver reacts with alkali cyanides?
What is the product of the reaction between silver nitrate and sodium cyanide?
What is the product of the reaction between silver nitrate and sodium cyanide?
Why is it necessary to prevent the accumulation of sodium sulphide during the extraction of silver?
Why is it necessary to prevent the accumulation of sodium sulphide during the extraction of silver?
What is the oxidation state of gold in auric chloride?
What is the oxidation state of gold in auric chloride?
Which of the following gold compounds is not attached by dilute mineral acids?
Which of the following gold compounds is not attached by dilute mineral acids?
What is the use of chloroauric acid in photography?
What is the use of chloroauric acid in photography?
What is the colour of calaverite, an ore of gold?
What is the colour of calaverite, an ore of gold?
Which process is used to extract gold from its ores?
Which process is used to extract gold from its ores?
What is the ratio of potassium dichromate to sodium dichromate in a hot concentrated solution?
What is the ratio of potassium dichromate to sodium dichromate in a hot concentrated solution?
What is formed when chromyl chloride vapours are passed through water?
What is formed when chromyl chloride vapours are passed through water?
What is the use of potassium dichromate as an oxidising agent?
What is the use of potassium dichromate as an oxidising agent?
What is the structure of the chromate ion?
What is the structure of the chromate ion?
What is the equilibrium reaction between chromates and dichromates?
What is the equilibrium reaction between chromates and dichromates?
What is the oxidation state of manganese in potassium permanganate?
What is the oxidation state of manganese in potassium permanganate?
What is the intermediate compound formed during the conversion of pyrolusite to potassium manganate?
What is the intermediate compound formed during the conversion of pyrolusite to potassium manganate?
Which of the following is used to oxidize potassium manganate to potassium permanganate?
Which of the following is used to oxidize potassium manganate to potassium permanganate?
What is the byproduct formed during the oxidation of potassium manganate to potassium permanganate?
What is the byproduct formed during the oxidation of potassium manganate to potassium permanganate?
What is the original source of manganese used to produce potassium permanganate?
What is the original source of manganese used to produce potassium permanganate?
