An organic compound A reacts with `PCl_(5)` to give compound B. Compound B reacts with Na/ether to give n-butane. What are compounds A and B ?

Which compound reacted with CO_2 gives an organic compound?

Compound (A) racts with SOCl_2 to give compound (B). The compound (B) reacts with Mg metal give Grignard's reagent , which is treated with acetone and product is hydrolysed to give 2-methyl-2-butanol . What is (A)?

An organic compound [A] is C_(5)H_(8)O_(3). On heating with soda lime, it gives [B]. The compound [B] reacts with HCN to give another compound [C] which reacts with thionyl chloride to produce [D]. When the compound [A] is heated with potassium dichromate the product is acetic acid and malonic acid. The compound [A] is a