s-Block ElementsHard
Question
Select the correct statement(s) with respect to sodium hydroxide.
Options
A.It is used in paper industry
B.Zinc and aluminium liberates hydrogen gas on heating with NaOH.
C.It is prepared by reaction of sodium carbonate with milk of lime.
D.It is hygroscopic in nature.
Solution
(A) It is used for making pulp in paper industry.
(B) 6NaOH + 2Al → 2Na3AlO3 + H2
2NaOH + Zn → Na2ZnO2 + H2
(C) Ca(OH)2 (milk of lime) + Na2CO3 → CaCO3 ↓ + 2NaOH
(D) It readily absorbs water on exposure to atmosphere and turns in to a liquid.
(B) 6NaOH + 2Al → 2Na3AlO3 + H2
2NaOH + Zn → Na2ZnO2 + H2
(C) Ca(OH)2 (milk of lime) + Na2CO3 → CaCO3 ↓ + 2NaOH
(D) It readily absorbs water on exposure to atmosphere and turns in to a liquid.
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