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Number of pairs of isotonic solutions from a given list

This type of question, asked 2 times: 25 Jan 2023, 6 Apr 2023. All 2 questions below, oldest first.

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  1. Question 1

    25 Jan 2023

    147
    The number of pairs of the solutions having the same value of the osmotic pressure from the following is (Assume 100%100\% ionization) A. 0.500MC2H5OH(aq)0.500MC_{2}H_{5}OH\left( aq \right) and 0.25MKBr(aq)0.25MKBr\left( aq \right) B. 0.100MK4[Fe(CN)6]0.100MK_{4}\left\lbrack Fe(CN)_{6} \right\rbrack (aq) and 0.100MFeSO4(NH4)2SO40.100MFeSO_{4}\left( NH_{4} \right)_{2}SO_{4} (aq) C. 0.05MK4[Fe(CN)6]0.05MK_{4}\left\lbrack Fe(CN)_{6} \right\rbrack (aq) and 0.25MNaCl(aq)0.25MNaCl\left( aq \right) D. 0.15MNaCl(aq)0.15MNaCl\left( aq \right) and 0.1MBaCl20.1MBaCl_{2} (aq) E. 0.02MKCl⋅MgCl2⋅6H2O(aq)0.02MKCl \cdot MgCl_{2}\cdot 6H_{2}O\left( aq \right) and 0.05MKCl(aq)0.05MKCl\left( aq \right)

  2. Question 2

    6 Apr 2023

    143
    Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is/are A. 1M1M aq. NaClNaCl and 2M2M aq. Urea B. 1M1M aq. CaCl2CaCl_{2} and 1.5M1.5M aq. KClKCl C. 1.5M1.5M aq. AlCl3AlCl_{3} and 2M2M aq. Na2SO4Na_{2}SO_{4} D. 2.5M2.5M aq. KClKCl and 1M1M aq. Al2(SO4)3Al_{2}\left( SO_{4} \right)_{3}