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D and F Block Elements question

2005 · Shift 0 · Q30

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D and F Block Elements
2005 · Shift 0 · Q30

D and F Block Elements question

2005 · Shift 0 · Q30

JEE MainChemistryD and F Block ElementsMCQ+4 / −1

On heating mixture of

C{u_2}O

and

C{u_2}S

will give :

A
$C{u_2}S{O_3}$
B
$CuO + CuS$
C
$Cu + S{O_3}$
D
$Cu + S{O_2}$

View written solutionFree

Correct answer: D

Identify the reaction involved

A mixture of cuprous oxide and cuprous sulphide on heating undergoes self-reduction (also called auto-reduction), which is used in copper metallurgy.

The reaction is:

$Cu_2S + 2Cu_2O \xrightarrow{\Delta} 6Cu + SO_2$

Understand the products

From the balanced equation, the products formed are:

Copper metal: $Cu$
Sulphur dioxide gas: $SO_2$

Match with the options

A: $Cu_2SO_3$ — not formed
B: $CuO + CuS$ — not the reaction products
C: $Cu + SO_3$ — incorrect oxide of sulphur
D: $Cu + SO_2$ — correct

Final answer

Therefore, on heating a mixture of $Cu_2O$ and $Cu_2S$ , the products are:

$Cu + SO_2$

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