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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3bn038

Select the species in which the named element is in the $+ 5$ oxidation state (H is $+ 1$ , Na is $+ 1$ , O is $- 2$ ).

AP in $HPO X_{3}$
BP in $H X_{4} P X_{2} O X_{7}$
CCl in $ClO X_{3} X^{-}$
DP in $Na X_{2} HPO X_{3}$

Answer: A, B, C

HPO X_{3}

:

1 + x - 6 = 0

gives P

+ 5

.

ClO X_{3} X^{-}

:

x - 6 = - 1

gives Cl

+ 5

.

H X_{4} P X_{2} O X_{7}

:

4 + 2 x - 14 = 0

gives P

+ 5

.

Na X_{2} HPO X_{3}

:

2 + 1 + x - 6 = 0

gives P

+ 3

.

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