Chemistry - Complete d-block Question with Solution | TestHub

ChemistryComplete d-blockd-blockEasy2 minPYQ_2003

ChemistryEasysingle choice

Assertion : Solution of $Na_{2} CrO_{4}$ in water is coloured. Reason: Oxidation state of $Cr$ in $Na_{2} CrO_{4}$ is +6 .

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Solution:

$Na_{2} CrO_{4}$ solution in water is yellow in colour, when acidified changes to orange colour (due to the formation of $Cr_{2} O_{7}^{2 -}$ ions). $Na_{2} CrO_{4} + H_{2} SO_{4} \to Na_{2} Cr_{2} O_{7} + Na_{2} SO_{4} + H_{2} O$ Oxidation state : $Na_{2} CrO_{4}$ Let oxidation state of $Cr$ be $x$ . $\Rightarrow 2 (+ 1) + x + 4 (- 2) = 0 \Rightarrow x = + 6 .$

Stream:AIIMSSubject:ChemistryTopic:Complete d-blockSubtopic:d-block

⏱ 2mℹ️ Source: PYQ_2003

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