Question

4.
Which of the following is used to
demask zinc from the zinc-cyanide
complex? A. Iron B. Potassium
iodide C. Chloral hydrate D.
Triethanolamine *​

Answer 1

Answer:

For selective demasking of zinc from its cyanide complex it has been observed that addition of a formaldehyde:acetone mixture is more effective than that of formaldehyde alone.