JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Mock Test - Some Basic Concepts of Chemistry

Valency factors for \[C{{u}_{2}}S\] and \[C{{u}_{{}}}S\] is x and y respectively when they react with KMn\[{{O}_{4}}\] in acidic medium. What is the value of x- y?

A) 4

B) 2

C) 5

D) 6

Correct Answer: B

Solution :

\[In\,\,C{{u}_{2}}S,\]	Valency factor
\[2C{{u}^{+}}\xrightarrow{{}}\underset{+2}{\mathop{2C{{u}^{2+}}}}\,+2{{e}^{-}}\]	\[2\]
\[{{S}_{-2}}^{2-}\xrightarrow{{}}\underset{+4}{\mathop{S{{O}_{2}}}}\,+6{{e}^{-}}\]	\[6\]

\[\Rightarrow \] In \[C{{u}_{2}}S\]valency factor \[x=8\] \[In\,\,CuS,\] \[C{{u}^{2+}}\]doesnot undergo any change \[{{S}^{2-}}\]undergoes the same change as above. Thus valency factor for \[CuS\,\,is\,\,y=6\] Thus, \[x-y=2.\]

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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Mock Test - Some Basic Concepts of Chemistry

question_answer Valency factors for \[C{{u}_{2}}S\] and \[C{{u}_{{}}}S\] is x and y respectively when they react with KMn\[{{O}_{4}}\] in acidic medium. What is the value of x- y? A) 4 B) 2 C) 5 D) 6

Valency factors for \[C{{u}_{2}}S\] and \[C{{u}_{{}}}S\] is x and y respectively when they react with KMn\[{{O}_{4}}\] in acidic medium. What is the value of x- y?

A) 4

B) 2

C) 5

D) 6