Question

A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute sulphuric acid, but gives no precipitate with sodium chloride or iodide. The white precipitate obtained when sodium carbonate is added to the metal salt solution consists of:
A) Lead carbonate
B) Basic lead carbonate
C) Barium carbonate
D) Strontium carbonate

Answer 1

HintFirstly we should be clear that what exactly is the ccp structure and what it represents along with that. So we get that it is a specific way of lattice integration in which we have the atoms arranged accordingly creating voids. Now after that we get that there is only one octahedral void created in the middle of the lattice. So the answer is one.

Complete step by step answer:
Firstly we should be aware of the concept of anode and terms associated with it .
Precipitation is defined as the creation of a solid from a solution. When the reaction occurs in a liquid solution, the solid formed is called the 'precipitate'. The chemical that causes the solid to form is called the 'precipitant'. Without sufficient force of gravity (settling) to bring the solid particles together, the precipitate remains in suspension. After sedimentation, especially when using a centrifuge to press it into a compact mass, the precipitate may be referred to as a 'pellet'.
The white precipitate obtained when sodium carbonate is added to the metal salt solution consists of barium carbonate.
Potassium chromate \[{K_2}Cr{O_4}\] solution gives a yellow precipitate of barium chromate when the solution of fifth group precipitate in acetic acid is treated with it.
So, clearly we can conclude that the correct answer is Option C.

Note:Barium carbonate is the inorganic compound with the formula \[BaC{O_3}\] . Like most alkali metal carbonates, it is a white solid that is poorly soluble in water. It occurs as the mineral known as witherite. In a commercial sense, it is one of the most important barium compounds.