Question

Identify the substance which matches the description given below:

1. White crystalline substance which sublimes on heating.

2. The gas which turns lime water milky but has no effect on potassium

dichromate paper.

3. The metal that cannot displace hydrogen from dilute hydrochloric

acid.​

Answer 1

1. Substances that get converted to vapors without passing through the liquid state on heating sublime. Naphthalene, benzoic acid, and camphor are some example of substances that sublime on heating.
2. CO2 also termed as carbon dioxide has no effect on potassium dichromate paper. it is also a Greenhouse gas and leading to global warming on earth.
3. ron and aluminium will displace hydrogen from dilute acids as they more reactive then hydrogen. Mercury and copper cannot displace hydrogen from dilute acids as they are less reactive than hydrogen.

Answer 2

Answer:

Substances that get converted to vapors without passing through the liquid state on heating sublime.

CO2 also termed as carbon dioxide

aluminium and iron

Explanation: