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Q#1
GATE CH 2018
NAT
+2 marks
-0 marks
It is decided to extract 
from a feed containing 20 mol% and 80 mol% 
in two ideal cross-current stages as shown below, using equal amount of pure solvent 
in each stage.
Components and are immiscible. 60% of in the feed is extracted in Stage 1. The equilibrium relation is given by 
where,
moles of per mole of in raffinate
moles of per mole of in extract in equilibrium with raffinate
The mol % of in raffinate from Stage 2 is 
(rounded off to second decimal place).
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| Topic | Questions | Attempted | Correct | |
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| Heat Transfer | 26 | 0 | 0 | |
| Chemical Technology | 17 | 0 | 0 | |
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| Mass Transfer | 42 | 0 | 0 | |
| Instrumentation and Process Control | 26 | 0 | 0 | |
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| Plant Design Economics | 10 | 0 | 0 | |
| Thermodynamics | 24 | 0 | 0 |
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