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JEE MainChemistryModeratePhysical Chemistry

Suppose 40 w/w aqueous solution of glucose (C_6H_12O_6) and
20 w/w aqueous solution of urea(NH_2CONH_2) have equal molarity, then
which solution has higher density

Show answer and solution
Given: M_1 = M_2
10d1x1M1=10d2x2M2\frac{10d_{1}x_{1}}{M_{1}} = \frac{10d_{2}x_{2}}{M_{2}}
∴d1d2=x2x1×M1M2=2040×18060       =32\therefore\frac{d_{1}}{d_{2}} = \frac{x_{2}}{x_{1}} \times \frac{M_{1}}{M_{2}} = \frac{20}{40} \times \frac{180}{60}\ \ \ \ \ \ \ = \frac{3}{2}
Thus, d_1> d_2

Source: Grass-G / CH-05 Chemistry Paper 10 October.docx

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