MCQEasyJEE 2023Group 13 Elements

JEE Chemistry 2023 Question with Solution

For compound having the formula GaCl3\mathrm{GaCl_3}, the correct option from the following is:

  • A

    Ga forms bond with Cl in GaCl3\mathrm{GaCl_3}.

  • B

    Ga is coordinated with Cl in GaCl3\mathrm{GaCl_3}.

  • C

    Ga is more electronegative than Cl and is present as a cationic part of the salt.

  • D

    Oxidation state of Ga in GaCl3\mathrm{GaCl_3} is +3+3.

Answer

Correct answer:D

Step-by-step solution

Standard Method

Given: The compound is GaCl3\mathrm{GaCl_3}.

Find: Which statement is correct.

From the solution text, gallium in GaCl3\mathrm{GaCl_3} is in the oxidation state +3+3. The explanation also states that gallium has lower electronegativity than chlorine, so the statement claiming Ga is more electronegative than Cl is incorrect.

Thus, the correct statement is that the oxidation state of Ga in GaCl3\mathrm{GaCl_3} is +3+3.

Therefore, the correct option is D.

Option Check

Given: The compound is GaCl3\mathrm{GaCl_3}.

Find: Evaluate each option using the provided explanation.

  1. The solution contains an inconsistency about the nature of bonding, so this statement is not taken as the correct option.
  2. The explanation does not support this as the final correct statement.
  3. This is incorrect because Ga is less electronegative than Cl.
  4. In GaCl3\mathrm{GaCl_3}, each Cl has oxidation state 1-1, so for a neutral compound:
Oxidation state of Ga+3(1)=0\text{Oxidation state of Ga} + 3(-1) = 0 Oxidation state of Ga=+3\text{Oxidation state of Ga} = +3

Therefore, the correct option is D.

Common mistakes

  • Assuming GaCl3\mathrm{GaCl_3} is purely ionic because it contains a metal and a non-metal is incorrect. Here, the reliable conclusion from the given solution is the oxidation state, not a simplistic bonding classification. Focus on the statement directly supported by the data.

  • Thinking Ga is more electronegative than Cl is wrong because chlorine is more electronegative. Compare periodic trends before accepting such statements.

  • Confusing coordination description with oxidation state can lead to the wrong option. First calculate oxidation state using charge balance, then judge the remaining statements.

Practice more Group 13 Elements questions

Get unlimited AI-adaptive practice, mastery tracking, and an AI tutor that explains every step — free to start.

Related questions