Prepare for NEET Chemistry Isolation Of Elements with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert explanations of extraction processes.
NEET Questions / Chemistry / General Principles And Processes Of Isolation Of Elements
Smelting involves heating the ore with a reducing agent. Which of the following is commonly used as a reducing agent in smelting?
Oxygen
Water
Coke
Sodium chloride
Why is carbon not used to displace silver from the complex in the extraction process?
Carbon is a non-metal and a weaker reducing agent than silver, hence it cannot displace silver from its complex.
Carbon reacts with the cyanide ions to form a more stable complex.
Carbon forms a stable carbide with silver, preventing its displacement.
The reaction between carbon and the silver complex is thermodynamically unfavorable.
In the extraction of silver from its ore, after leaching with , the solution containing is treated with zinc dust. What is the role of zinc in this process?
To displace silver from the cyanide complex
To form a complex with cyanide ions
To oxidize silver ions
To purify the silver obtained
