Identify the incorrect statement...

Identify the incorrect statement

`Delta_(0)` increasing order is `[CrCl_(6)]^(3-)lt[Cr(NH_(3))_(6)]^(3+)lt[Cr(CN)6]^(3-)`

CFSE for `[Ti(H_(2)O)_(6)]^(3+)` is `-0.4Delta_(0)`

`[NiCl_(4)]^(2-)` as well as `[Ni(CO)_(4)]` are paramagnetic

The halide ions are arranged as `I^(-)ltBr^(-)ltCl^(-)ltF^(-)` in the spectron chemical series

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The combination of several monomers under suitable experimental condition to form a giant, three dimensional polymer is known as polymerisation. Natural polymers are classified on the basis of their chemical composition. Synthetic polymers are classified on the basis of the physical properties, into elastomers, plastics and fibres. Identify the incorrect statement regarding thermosetting polymers

They soften on heating

They are formed by condensation reaction

They have cross-linked structure

They are hard rigid are brittle

1-I

2-II

3-III

4-IV

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