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JEE Advance - Chemistry (1993 - No. 10)

The basic nature of the hydroxides of group 13 (Gr. III B) decreases progressively down the group.
TRUE
FALSE

설명

The answer is FALSE.

Here's why:

  • Basic Nature and Metallic Character: The basic nature of hydroxides is related to the metallic character of the element forming the hydroxide. As you move down a group in the periodic table, metallic character increases.

  • Group 13 Trends: In Group 13, as you move down the group from Boron (B) to Thallium (Tl):

  • Metallic character increases.

  • The size of the atom increases.

  • The tendency to lose electrons increases.

  • Hydroxide Formation: This increased metallic character leads to more ionic bonds between the metal and the hydroxide (OH-) group. More ionic bonds mean easier dissociation into ions in solution, making the hydroxide more basic.
Therefore, the basic nature of the hydroxides of group 13 elements INCREASES down the group.

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