Which among the following is the heaviest iso | vedclass

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(D) The molecular weight of water isotopes depends on the mass of the hydrogen isotopes $(H=1, D=2, T=3)$ and oxygen isotopes $(^{16}O=16, ^{17}O=17,

Vedclass · Accepted Answer

$T_{2}{ }^{18}O$

Vedclass · Answer

(D) The molecular weight of water isotopes depends on the mass of the hydrogen isotopes $(H=1, D=2, T=3)$ and oxygen isotopes $(^{16}O=16, ^{17}O=17, ^{18}O=18)$.Calculating the molar mass for each option:$A$. $T_{2}{ }^{17}O = (3 	imes 2) + 17 = 23 \ g/mol$$B$. $T_{2}{ }^{16}O = (3 	imes 2) + 16 = 22 \ g/mol$$C$. $HD^{18}O = (1 + 2) + 18 = 21 \ g/mol$$D$. $T_{2}{ }^{18}O = (3 	imes 2) + 18 = 24 \ g/mol$Comparing the values,$T_{2}{ }^{18}O$ has the highest molecular weight,making it the heaviest isotope of water.

List-$I$	List-$II$
$(a). H_2O + H_2S$	$(i). (H_3O^{+}, HS^{-})$
$(b). H_2O + N^{3-}$	$(ii). (NH_3, OH^{-})$
$(c). H_2O + SiCl_4$	$(iii). (OH^{-}, H_3S^{+})$
$(d). H_2O + F_2$	$(iv). (SiO_2, HCl)$
	$(v). (SiO_4^{4-}, Cl_2)$
	$(vi). (O_2, F^{-})$
	$(vii). (HF, OH^{-})$
	$(viii). (OH^{-}, NH_3)$

Which among the following is the heaviest isotope of water?

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