General Principles and processes of Isolation of Elements
medium

निम्नलिखित में से कौनसे अयस्क का सांद्रण, वर्ग 1 सायनाइड लवण का प्रयोग करके किया जाता है $?$

A

स्फेलेराइट

B

कैलामाइन

C

सिडराइट

D

मेलाकाइट

(JEE MAIN-2021)

Solution

Sphalerite ore : $ZnS$

Calamine ore : $ZnCO _{3}$

Siderite ore : $FeCO _{3}$

Malachite ore : $Cu ( OH )_{2} \cdot CuCO _{3}$

It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants'. In case of an ore containing $ZnS$ and $PbS$, the depressant used is $NaCN$.

Standard 12
Chemistry

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