The incorrect order is:

CHEMISTRY · Single correct · CBSE · Chemistry · Classification of Elements and Periodicity in Properties · Classification of Elements and Periodicity in Properties

Problem

The incorrect order is: (1) N>P>As\mathrm{N}>\mathrm{P}>\mathrm{As}: strength of the π\pi bond with an oxygen atom (2) SiF4>SiCl4>SiBr4>SiI4\mathrm{SiF_4}>\mathrm{SiCl_4}>\mathrm{SiBr_4}>\mathrm{SiI_4}: thermal stability (3) H2S>H2Se>H2Te\mathrm{H_2S}>\mathrm{H_2Se}>\mathrm{H_2Te}: Arrhenius acid character (4) CaBr2>MgBr2>BeBr2\mathrm{CaBr_2}>\mathrm{MgBr_2}>\mathrm{BeBr_2}: melting point

Related theory

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