Question

10. How can you obtain hydrogen from a mixture of hydrogen
and carbon monoxide ?
11. Name a metal which cannot be used for the preparation
of hydrogen using dilute acid.
12. Name the salt formed when aluminium reacts with
potassium hydroxide.
13. Name the product formed when hydrogen burns in air
with a pale blue flame.​

Answer 1

10)Cool the mixture of hydrogen and carbon monoxide at -200°C temperature where CO will be liquefied. Hydrogen will be in the gaseous state and thus so the mixture is separated.

11)metals such as Aluminum, Copper, Mercury does not react with and HCl to produce Hydrogen.

12)The salt formed when aluminium reacts with potassium hydroxide is aluminium chloride.

13)Hydrogen burns with a pop sound in oxygen with a pale blue flame forming water as a steam

hope it helps:)...