Ammonium hydroxide is
an acid
a base
a neutral

A base

Explanation:

Ammonium hydroxide has a pH of 11.1; therefore it is a weak base

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The electronegativity difference of the Al and Cl atoms in AlCl₃ molecule is 1.55 while the electronegativity difference of the Al and Br atoms in AlBr₃ is 1.35

The electronegativity difference of atoms in AlCl₃ molecules is as follows:
3.16 - 1.61 = 1.55
The electronegativity difference of atoms in AlBr₃ molecules is as follows:
2.96 - 1.61 = 1.35

- Both the molecules have a significant amount of difference in the electronegativity of atoms → This shows that both molecules have polar character.

- But, the electronegativity difference in molecule AlCl₃ is 1.55, which is greater than 1.35 of the AlBr₃.

Therefore AlCl₃ is more polar molecule than AlBr₃