PYQ Vault
EbooksTutor

Borax bead test colours of transition metal ions

This type of question, asked 3 times: 5 Apr 2024, 28 Jan 2025, 2 Apr 2026 S2. All 3 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    5 Apr 2024

    52
    In a borax bead test under hot condition, a metal salt (one from the given) is heated at point BB of the flame, resulted in green colour salt bead. The spin-only magnetic moment value of the salt is ............. BM (Nearest integer) [Given atomic number of Cu=29,Ni=28Cu = 29,Ni = 28, Mn=25,Fe=26]Mn = 25,Fe = 26\rbrack

  2. Question 2

    28 Jan 2025

    36
    The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

    Tap an option to check your answer.

  3. Question 3

    2 Apr 2026 S2

    45
    Among Fe2+,Fe3+,Cr2+Fe^{2 +},Fe^{3 +},Cr^{2 +} and Zn2+Zn^{2 +}, the ion that shows positive borax bead test and with highest ionisation enthalpy is:

    Tap an option to check your answer.