What is the trend in acid strength going down a group and what is the trend based on?

Going down a group the acid strength increases because the bond strength decreases as a function of increasing size of the nonmetal, and this has a larger effect than the electronegativity.

How does basicity increase?

2. Basicity Trend #1: Basicity Increases With Increasing Negative Charge On Nitrogen. This is possibly the simplest factor to evaluate. If “basicity” can roughly be translated as “electron-pair instability”, and instability increases with charge density, then basicity should increase with increased negative charge.

Why does basicity down the group decrease?

The elements placed down the group in the periodic table have their atomic size in an ascending order with relevance to the other, thereby when the atom size increases, atomic radius increases, and when the atomic radius increases, electron density of the atom decreases, so, when the electron density decreases.

Does basicity increase down the group?

In general, basicity increases down a group (e.g., in the alkaline earth oxides, BeO < MgO < CaO < SrO < BaO). Acidity increases with increasing oxidation number of the element.

Why does basicity increase down a group?

When the non-metal is more electronegative, it has more acidic oxide in nature. Electronegativity decreases down the group because the “distance between the nucleus and the valence shell electron increases. While on moving down the group, basic character increases due to its increase in metallic character.

Which of the following group decreases the basicity of amines?

23.5 Basicity of Amines Thus, the basicity of amines can be explained only for amines with similar structures at the nitrogen atoms. The basicity of an amine is increased by electron-donating groups and decreased by electron-withdrawing groups.

Why does basicity decrease in Group 15?

In group 15, the hydrides have a lone pair on the central atom. Going down the group, size of the atom increases. And hence, electron density over the group 15 elements decreases. Thus tendency to donate electrons decreases and basicity decreases.

What will be the correct trend of basic character?

Therefore, as per the discussion made above, we can say that the basic character decreases from left to right and increases from top to bottom. Hence, the correct answer is option (c) decreases from left to right and increases from top to bottom.