Metallurgy · JEE Main previous year questions

2012 2 questions

1. Q882012 · 26 May 2012 · Shift 1

   The substance used as froth stabilisers in froth-floatation process is

   1. A.Potassium ethyl xanthate
   2. B.Aniline
   3. C.Sodium cyanide
   4. D.Copper sulphate
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   Answer: B

2. Q622012 · 12 May 2012 · Shift 1

   $5\mathrm{g}$ of benzene on nitration gave $6.6\mathrm{g}$ of nitrobenzene. The theoretical yield of the nitrobenzene will be

   1. A.$4.5\mathrm{g}$
   2. B.$5.6\mathrm{g}$
   3. C.$8.09\mathrm{g}$
   4. D.$6.6\mathrm{g}$
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   Answer: C