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ChemistryMole ConceptExpetimental Determination of Atomic Mass/Molecuair massMedium2 minQB

ChemistryMediuminteger

Passage / Comprehension

For the following reactions:

Microcosmic salt $Δ$ P ↑+ Q (solid) + $x H_{2} O$ ↑

$M n^{2 +}$ (aq) + P↑+ $H_{2} O_{2}$ $\to$ R ↓(Brown)

Q (solid) + $C o O$ $Δ o x i d i s i n g f l am e$ S (Blue coloured solid)

Answer the following questions :

When solid ' R ' is fused with KOH in the presence of air, then Molecular weight of compound formed = $____$ $(K = 39, Mn = 55, p = 31, Co = 59, Na = 23)$

Answer:

197

Solution:

$P \to NH_{3}, Q \to NaPO_{3}, R \to MnO_{2}, S \to NaCoPO_{4}$

$MnO_{2} + KOH + O_{2} Δ K_{2} MnO_{4}$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Expetimental Determination of Atomic Mass/Molecuair mass

⏱ 2mℹ️ Source: QB

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