Which of the following orders is correct - | vedclass

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(B) $1$. Basic character of oxides increases down the group as metallic character increases. Thus,$Li_2O < Na_2O < K_2O < Cs_2O$ is correct.$2$. Acidi

Vedclass · Accepted Answer

Acidic character $: Al_2O_3 < SiO_2 < P_2O_5 < Cl_2O_7$

Vedclass · Answer

(B) $1$. Basic character of oxides increases down the group as metallic character increases. Thus,$Li_2O $2$. Acidic character of oxides increases with the increase in oxidation state of the non-metal. For $Al_2O_3$ (amphoteric),$SiO_2$ (weakly acidic),$P_2O_5$ (acidic),and $Cl_2O_7$ (strongly acidic),the order $Al_2O_3 $3$. Acidic strength of hydrohalic acids increases down the group due to decrease in bond dissociation enthalpy. Thus,$HF $4$. Acidic character of nitrogen oxides increases with the oxidation state of nitrogen: $N_2O (+1) Since the question asks for the correct order,and multiple options provided in the original text were chemically incorrect,option $B$ represents the standard periodic trend for acidic oxides.

Element	$ \Delta_i H_1 $ $( kJ \ mol^{-1} )$	$ \Delta_i H_2 $ $( kJ \ mol^{-1} )$	$ \Delta_{eg} H $ $( kJ \ mol^{-1} )$
$ I $	$ 520 $	$ 7300 $	$ -60 $
$ I.I $	$ 490 $	$ 3051 $	$ -48 $
$ III $	$ 1681 $	$ 3374 $	$ -328 $
$ IV $	$ 2372 $	$ 5251 $	$ +48 $

Which of the following orders is correct $-$

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