A) 2
B) 8
C) 5
D) 0.5
E) 10
Correct Answer: C
Solution :
By using the relation \[\Delta {{T}_{b}}=\frac{{{k}_{b}}\times {{w}_{B}}\times 1000}{{{M}_{B}}\times {{w}_{A}}}\] Here, \[\Delta {{T}_{b}}=1\,K,\]\[{{w}_{B}}=0.5g,\] \[{{w}_{A}}=25g\] \[{{M}_{B}}=100\,g\,\text{mo}{{\text{l}}^{-1}}\] \[\therefore \] \[1=\frac{{{k}_{b}}\times 0.5\times 1000}{100\times 25}\] \[{{k}_{b}}=5\]You need to login to perform this action.
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