JEE Main 2022 · 28 Jun · Shift 1 · Chemistry Q67

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ChemistrySingle correct+4 / -1Question 67 of 90

Given below are two statements :

Statement I : The pentavalent oxide of group-15 element, $\mathrm{E_2O_5}$ , is less acidic than trivalent oxide, $\mathrm{E_2O_3}$ , of the same element.

Statement II : The acidic character of trivalent oxide of group 15 elements, $\mathrm{E_2O_3}$ , decreases down the group.

In light of the above statements, choose most appropriate answer from the options given below :

Both Statement I and Statement II are true.

Both Statement I and Statement II are false.

Statement I true, but statement II is false.

Statement I is false but statement II is true.

Answer and worked solution

Official answer: D

Statement I is false: the higher oxidation state oxide $\mathrm{E_2O_5}$ is more acidic. Statement II is true: $\mathrm{E_2O_3}$ goes from acidic ( $\mathrm{N_2O_3}$ ) to basic ( $\mathrm{Bi_2O_3}$ ) down the group.

(D)

Topics:Group 15

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JEE Main 2022 · 28 Jun · Shift 1, Chemistry question 67