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Which of the following statements is incorrect about sodium hydroxide ? 

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Which of the following statements is incorrect about sodium hydroxide ? 

(a) It is a white, translucent crystalline solid 

(b) It is highly soluble in water to give a strong alkaline solution which is bitter in taste, corrosive and soapy to touch 

(c) Crystals of NaOH are not hygroscopic

(d) If reacts with CO2 in the atmosphere to form Na CO3

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Answer is (c) Crystals of NaOH are not hygroscopic

Crystals of NaOH are highly deliquescent, i.e. have the ability to absorb moisture from the air to such an extent that they dissolve in it. Thus,NaOH becomes liquid on exposure to air.

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