The stopcocks of the bulbs X (containing NH3) and Y (containing HCl), both under identical conditions, are opened simultaneously. White fumes of NH4Cl, are formed at point B. If AB=36.5cm, then BC is approximately :
A
18.0 cm
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B
25.0 cm
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C
20.0 cm
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D
36.5 cm
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Solution
The correct option is B 25.0 cm rHClrNH3=μHClμNH3=√1736.5=0.682