A) zinc blende and iron pyrites are sulphides
B) calamine and siderite are carbonates
C) malachite and azurite are ores of copper
D) argentite and cuprite are oxides
Correct Answer: D
Solution :
Statement : Zinc blende and iron pyrites are sulphides. This statement is correct because zinc blende is ZnS and iron pyrites is \[Fe{{S}_{2}}\]. Statement : Calamine and siderite are carbonates. This statement is correct because calamine is \[ZnC{{O}_{3}}\] and siderite is \[FeC{{O}_{3}}\]. Statement : Malachite and azurite are ores of copper. This statement is also correct because malachite is \[Cu{{(OH)}_{2}}\,.\,\,CuC{{O}_{3}}\] and azurite is\[Cu{{(OH)}_{2}}\,.\,\,2CuC{{O}_{3}}\]. Statement : Argentite and cuprite are oxides. This statement is incorrect because argentite is \[A{{g}_{2}}S\] and cuprite is \[C{{u}_{2}}O\].
You need to login to perform this action.
You will be redirected in
3 sec
