Chemistry · 2019
JEE Main · 9 January 2019, Shift 1 · Q51
A solution of sodium sulfate contains 92 g of Na^+ ions per kilogram of water. The molality of Na^+ ions in that solution in mol kg^-1 is:
A solution of sodium sulfate contains $\displaystyle 92$ g of $\displaystyle \mathrm{Na}^{+}$ions per kilogram of water. The molality of $\displaystyle \mathrm{Na}^{+}$ions in that solution in $\displaystyle \mathrm{mol} \mathrm{kg}^{-1}$ is :
Official answer
(1)
$\displaystyle 4$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.