SATHEE: Transition and InnerTransition Elements

Transition and InnerTransition Elements - Result Question 43

####44. Which of the following halides react(s) with $A g N O_{3} (a q)$ to give a precipitate that dissolves in $N a_{2} S_{2} O_{3} (a q)$ ?

(a) $H C l$

(b) $H F$

(d) $H I$

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Answer:

Correct Answer: 44. $(a, c, d)$

Solution:

Solubilities of silver halides in water decreases from fluoride $(A g F)$ to iodide $(A g I)$ . Silver fluoride is readialy soluble in water, hence when $A g N O_{3}$ solution is added to HF solution (HF being weak acid, its solution maintain very low concentration of $F^{-}$ ) no precipitate of $A g F$ is formed.

$H C l, H B r$ and $H I$ being all strong acid, forms precipitates of $A g C l, A g B r$ and $A g I$ when $A g N O_{3}$ solution is added to their aqueous solution.

The solubilities decreases from $A g C l$ to $A g I, A g C l$ dissolves in aqueous ammonia, $A g B r$ dissolves only slightly in concentrated ammonia while $A g I$ does not dissolve in ammonia solution.

$N a_{2} S_{2} O_{3}$ solution dissolve all three, $A g C l, A g B r, A g I$ by forming complex ${[A g {(S_{2} O_{3})}_{2}]}^{3 -}$ as $S_{2} O_{3}^{2 -}$ is a stronger complexing agent than ammonia.

Transition and InnerTransition Elements - Result Question 43

Answer:

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Transition and InnerTransition Elements - Result Question 43

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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