p-Block Elements · JEE Main previous year questions

2015 2 questions

1. Q682015 · 4 Apr 2015 · Shift 1

   In Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg of AgBr. The percentage of bromine in the compound is: (at. Mass Ag = 108; Br = 80)

   1. A.48
   2. B.60
   3. C.36
   4. D.24
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   Answer: D

2. Q722015 · 4 Apr 2015 · Shift 1

   Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction between nitrogen and oxygen requires high temperature.

   1. A.Both assertion and reason are correct, and the reason is the correct explanation for the assertion
   2. B.Both assertion and reason are correct, but the reason is not the correct explanation for the assertion
   3. C.The assertion is incorrect, but the reason is correct
   4. D.Both the assertion and reason are incorrect
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   Answer: A