Decreasing order (first having highest and then other following it) of mass of pure NaOH in each of the aqueous solution (P) 50 gm of `40%(w//w)` NaOH (Q) 50 gm of `50%(w//w)` NaOH `[d_("soln.")=1.2gm//ml]` (R) 50 gm of 20 M NaOH `[d_("soln").=1gm//ml]`
A
(i), (ii), (iii)
B
(iii), (ii), (i)
C
(ii), (iii), (i)
D
All contain same wt. of NaOH
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