Consider the following reactions. Na2B4O7 2X + Y CuSO4 + Y Non-Luminous flame Z + SO3 2Z + 2X + Carbon Luminous flame 2Q + Na2B4O7 + CO The oxidation states of Cu in Z and Q, respectively are : (A) +2

Question

Consider the following reactions. Na2B4O7 2X + Y CuSO4 + Y Non-Luminous flame Z + SO3 2Z + 2X + Carbon Luminous flame 2Q + Na2B4O7 + CO The oxidation states of Cu in Z and Q, respectively are :

(A) +2 and +2
(B) +2 and +1
(C) +1 and +2
(D) +1 and +1

Prashant Kotian · Accepted Answer

Correct answer: B.    4 2 3 X Na B O 2NaBO B O    (Z) 4 3 2 Non-Luminous flame (Blue bead) CuSO B O Cu(BO ) SO      2Cu(BO2)2 + 2NaBO2 + C Lu minous Flame   (Q) 2 Colorless 2Cu BO  + Na2B4O7 + CO

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