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Q#1
GATE CH 2017
NAT
+2 marks
-0 marks
An aqueous salt-solution enters a crystallizer operating at steady state at 25°C. The feed temperature is 
and the salt concentration in the feed is 40 weight 
. The salt crystallizes as a pentahydrate. The crystals and the mother liquor leave the crystallizer. The molecular weight of the anhydrous salt is 135 . The solubility of the salt at 
is 20 weight .
The feed flowrate required for a production rate of 
of the hydrated salt, rounded to the nearest integer, is 
kg/s.
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| Topic | Questions | Attempted | Correct | |
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| Heat Transfer | 26 | 0 | 0 | |
| Chemical Technology | 17 | 0 | 0 | |
| Mechanical Operations | 12 | 0 | 0 | |
| Mass Transfer | 42 | 0 | 0 | |
| Instrumentation and Process Control | 26 | 0 | 0 | |
| Fluid Mechanics | 24 | 0 | 0 | |
| Engineering Mathematics | 41 | 0 | 0 | |
| General Aptitude | 60 | 0 | 0 | |
| Chemical Reaction Engineering | 26 | 0 | 0 | |
| Process Calculation | 9 | 0 | 0 | |
| Plant Design Economics | 10 | 0 | 0 | |
| Thermodynamics | 24 | 0 | 0 |
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