1.

Which one of the following does not correctly represent the correct order of the propertyindicated against it?

Answer»

`Ti lt V lt Cr lt Mn :` INCREASING MELTING points
`Ti lt V lt Mn lt Cr :` increasing2nd ionization ENTHALPY
`Ti lt V lt Cr lt Mn :` increasing number of oxidation states
`Ti^(3+) lt V^(3+) lt Cr^(3+)Mn^(3+) :`increasing magnetic moment.

Solution :(a) does not represent the correct order of melting points.The correct order is `: Ti lt V lt Cr gtMn`. The melting points of transitoin elements first increase to a maximum and then fall as atomic number INCREASES. Mn, HOWEVER,has abnormally low melting point due to stable configuration and weak intermetallic bonding.


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