Chemistry · 2019
JEE Main · 12 January 2019, Shift 2 · Q51
8 g of NaOH is dissolved in 18 g of H_2 O. Mole fraction of NaOH in solution and molality (in mol kg^-1 ) of the solution respectively are:
$\displaystyle 8$ g of NaOH is dissolved in $\displaystyle 18$ g of $\displaystyle \mathrm{H}_2 \mathrm{O}$. Mole fraction of NaOH in solution and molality (in $\displaystyle \mathrm{mol} \mathrm{kg}^{-1}$ ) of the solution respectively are :
Official answer
(1)
$\displaystyle 0.167, 11.11$
More from Solutions
- Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and PQ_2. When 1 g of PQ is dissolved in 50 g of solvent 'A', Δ T_b was…2026
- At 363 K, the vapour pressure of A is 21 kPa and that of B is 18 kPa. One mole of A and 2 moles of B are mixed. Assuming that this solution is ideal,…2021
- Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non volatile solute are together sealed in a…2020
- The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H_2 C_2 O_4 · 2 H_2 O) in 250 mL of water in mol L^-1 is x × 10^-2. The…2021
- Solution A is prepared by dissolving 1 g of a protein (molar mass =50000 g mol^-1 ) in 0.5 L of water at 300 K. Its osmotic pressure is x bar.…2026
- Some amount of dichloromethane (CH_2 Cl_2) is added to 671.141 mL of chloroform (CHCl_3) to prepare 2.6 × 10^-3 M solution of CH_2 Cl_2(DCM). The…2023
- The osmotic pressure of a dilute solution is 7 × 10^5 Pa at 273 K. Osmotic pressure of the same solution at 283 K is ____ × 10^4 Nm^-2.2024
- C_6 H_6 freezes at 5.5^° C. The temperature at which a solution of 10 g of C_4 H_10 in 200 g of C_6 H_6 freeze is \ \ \ \ °C. (The molal freezing…2021
JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.