The common acid used in the manufacture of rayon and plastics is

For the reaction below, the product is $Q$.
The compound $Q$ is

Which of the following would be expected to be most highly ionised in water?

The correct order of decreasing acidity of the following aliphatic acids is $:-$

How many organic products will be formed when the following compound undergoes decarboxylation?
(Image: $A$ substituted cyclopentane ring with two $-COOH$ groups at the same carbon atom,and two $-CH_3$ groups at adjacent carbons.)

Which of the following acids will form an $(a)$ anhydride on heating and $(b)$ an acid imide on strong heating with ammonia?