What are the general characteristics of acids?

An organic compound burns with a sooty flame. Is it a saturated or an unsaturated compound?

(i) Alcohols are converted into carboxylic acid only under ……….

(ii) In partial oxidation; alcohols are converted into …………..

i. What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube?

ii. What type of reaction is this?

iii. Write a balanced chemical equation to represent the above reaction.

OR

A brown substance ‘X’ on heating in air forms a substance ‘Y’. When hydrogen gas is passed over heated ‘Y’, it again changes back into ‘X’.

i. Name the substance ‘X’ and ‘Y’

ii. Name the type of chemical reactions occurring during both the changes.

iii. Write the chemical equations of the reactions.