JEE Advanced 2025 Paper 1 Online | p-Block Elements Question 3 | Chemistry

JEE Advanced 2025 Paper 1 Online

MCQ (Single Correct Answer)

-1

The heating of NH₄NO₂ at 60–70 °C and NH₄NO₃ at 200–250 °C is associated with the formation of nitrogen containing compounds X and Y, respectively. X and Y, respectively, are

N₂ and N₂O

NH₃ and NO₂

NO and N₂O

N₂ and NH₃

JEE Advanced 2024 Paper 2 Online

MCQ (Single Correct Answer)

-1

The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are

$\left[\mathrm{PF}_4\right]^{+}\left[\mathrm{PF}_6\right]^{-}$and $\left[\mathrm{PCl}_4\right]^{+}\left[\mathrm{PF}_6\right]^{-}$

$\left[\mathrm{PCl}_4\right]^{+}\left[\mathrm{PCl}_4 \mathrm{~F}_2\right]^{-}$and $\left[\mathrm{PCl}_4\right]^{+}\left[\mathrm{PF}_6\right]^{-}$

$\mathrm{PF}_3$ and $\mathrm{PCl}_3$

$\mathrm{PF}_5$ and $\mathrm{PCl}_3$

JEE Advanced 2024 Paper 1 Online

MCQ (Single Correct Answer)

-1

At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid $\left(\mathrm{HNO}_2\right)$ gives the species

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}_3^{-}$and $\mathrm{NO}$

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}_3{ }^{-}$and $\mathrm{NO}_2$

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}^{-}$and $\mathrm{NO}_2$

$\mathrm{H}_3 \mathrm{O}^{+}, \mathrm{NO}_3{ }^{-}$and $\mathrm{N}_2 \mathrm{O}$

JEE Advanced 2023 Paper 1 Online

MCQ (Single Correct Answer)

-1

Match the reactions (in the given stoichiometry of the reactants) in List-I with one of their products given in List-II and choose the correct option.

List - I	List - II
(P) $\mathrm{P}_2 \mathrm{O}_3+3 \mathrm{H}_2 \mathrm{O} \rightarrow$	(1) $\mathrm{P}(\mathrm{O})\left(\mathrm{OCH}_3\right) \mathrm{Cl}_2$
(Q) $\mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \rightarrow$	(2) $\mathrm{H}_3 \mathrm{PO}_3$
(R) $\mathrm{PCl}_5+\mathrm{CH}_3 \mathrm{COOH} \rightarrow$	(3) $\mathrm{PH}_3$
(S) $\mathrm{H}_3 \mathrm{PO}_2+2 \mathrm{H}_2 \mathrm{O}+4 \mathrm{AgNO}_3 \rightarrow$	(4) $\mathrm{POCl}_3$
	(5) $\mathrm{H}_3 \mathrm{PO}_4$

$\mathrm{P} \rightarrow 2 ; \mathrm{Q} \rightarrow 3 ; \mathrm{R} \rightarrow 1 ; \mathrm{S} \rightarrow 5$

$\mathrm{P} \rightarrow 3 ; \mathrm{Q} \rightarrow 5 ; \mathrm{R} \rightarrow 4 ; \mathrm{S} \rightarrow 2$

$\mathrm{P} \rightarrow 5 ; \mathrm{Q} \rightarrow 2 ; \mathrm{R} \rightarrow 1 ; \mathrm{S} \rightarrow 3$

$\mathrm{P} \rightarrow 2 ; \mathrm{Q} \rightarrow 3 ; \mathrm{R} \rightarrow 4 ; \mathrm{S} \rightarrow 5$

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