IIT-JEE Exam

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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IIT-JEE Other Question

The maximum number of electrons that can have principal quantum number, n = 3, and spin quantum
number, ms=-1/2,is To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of
an unknown compound (vapour pressure 0.68 atm. at 0oC) are introduced. Considering the ideal gas
behaviour, the total volume (in litre) of the gases at 0oC is close to