Question

Minimum pH is shown by aqueous solution of :
(1) 0.1 M BaCl, (2) 0.1 M Ba(NO),
(3) 0.1 M BeCl, (4) 0.1 M Ba(OH),​

Answer 1

Answer: 3rd option

Explanation

-Acidic character increases across a period from left to right.

- Acidic character decreases down the group.

Using above two statements, we see that Barium salts are basic in nature, while Be salt is acidic as Be is metalloid.

Thus, BeCl​2 has the lowest pH.

Answer 2

Answer:1

Explanation:In the given options all 3 are Ba and its compounds

Its basicity increases down the grp

Be

Mg

Ca

Sr

Ba

Therefore Be is the most acidic one