Metallurgy · JEE Main previous year questions

2020 3 questions

1. Q602020 · 9 Jan 2020 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: B

2. Q622020 · 7 Jan 2020 · Shift 2

   Within each pair of elements F & Cl, S & Se, and Li & Na, respectively, the elements that release more energy upon an electron gain are :

   1. A.F, S and Li
   2. B.Cl, Se and Na
   3. C.Cl, S and Li
   4. D.F, Se and Na
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   Answer: C

3. Q692020 · 7 Jan 2020 · Shift 2

   The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :

   1. A.liquation
   2. B.vapour phase refining
   3. C.distillation
   4. D.zone refining
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   Answer: A