Consider the following statements and arrange in the order of true/false as given in the codes. S_1:In AB_2L_2 type, the BAB bond angle will be always greater than normal tetrahedral. S_2:Maleic acid has higher Ka_1 value than fumaric acid due to intramolecular hydrogen bonding. S_3:In CIO_3^(-), NH_3 and XeO_3, the hybridsation and the number of lone pairs on central atoms are same.

Consider the following statements and arrange in the order of true/fal

1.	Consider the following statements and arrange in the order of true/false as given in the codes. S_1:In AB_2L_2 type, the BAB bond angle will be always greater than normal tetrahedral. S_2:Maleic acid has higher Ka_1 value than fumaric acid due to intramolecular hydrogen bonding. S_3:In CIO_3^(-), NH_3 and XeO_3, the hybridsation and the number of lone pairs on central atoms are same.
Answer» T T T FTF F T T FFT Solution :`S_1:OF_2lt109.5^@ and Obr_2 gt 109.5^@` `OF_2` (appx.`102^@`):Fluorine being more electronegative attracts the bond pairs of electrons towards itself and THUS there is more lp-lp repulsion decreasing the bond angle. `Obr_2`(appx.`113^@`):The bond pairs are close to more electronegative oxygen ATOM and thus there is repulsion because bp-bp increasing the bond angle.The bulkier Br atoms also create STERIC repulsion which also increase bond angle. `S_2`:Anion of maleic acid (cis-form) gets stablised through intermolecular HYDROGEN bonding after giving one protons as given in following structure.In furmaric acid (trans-form) no such intramolecular H-bonding is possible.