Question

Section - 1: MCQ's with one correct answer
Hg[CO(NCS)4] is often used to calibrate the magnetic balance
What is the magnetic moment of complex?
in BM​

Answer 1

The magnetic moment of the complex is 3.87 B.M.

• An Evans balance is a tool for evaluating magnetic susceptibility.
• The Evans method is a practical and simple method for obtaining the magnetic balance of soluble metal complexes.
• It is also known as a Johnson-Matthey balance (after the commercial manufacturer of the Evans balance).
• The force that a substance feels in a magnetic field is related to magnetic susceptibility.
• The shape of the magnetic field and the method used to measure the force varies among the various devices available for susceptibility measurement.
• The Evans balance uses a sample setup that is comparable but this helps to gauge the force acting on the magnet.
• Co²+: 3d, Co³, 3d will be the magnetic balance of cobalt in the compound which can also be written as 3.87 B.M.
• Therefore, The magnetic moment of the complex is 3.87 B.M.

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