1
IIT-JEE 2011 Paper 1 Offline
Numerical
+3
-0

Reaction of Br2 with Na2CO3 in aqueous solution gives sodium bromide and sodium bromate with evolution of CO2 gas. The number of sodium bromide molecules involved in the balanced chemical equation is ________.

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2
IIT-JEE 2011 Paper 1 Offline
Numerical
+3
-0

The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is.

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3
IIT-JEE 2011 Paper 1 Offline
Numerical
+4
-0
The positive integer value of $$n\, > \,3$$ satisfying the equation $${1 \over {\sin \left( {{\pi \over n}} \right)}} = {1 \over {\sin \left( {{{2\pi } \over n}} \right)}} + {1 \over {\sin \left( {{{3\pi } \over n}} \right)}}$$ is
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4
IIT-JEE 2011 Paper 1 Offline
Numerical
+4
-0
If z is any complex number satisfying $$\,\left| {z - 3 - 2i} \right| \le 2$$, then the minimum value of $$\left| {2z - 6 + 5i} \right|$$ is
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