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The percentage of oxygen in NaOH is

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The percentage of oxygen in NaOH is

(A) 40 

(B) 60 

(C) 8 

(D) 10 

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The percentage of oxygen in NaOH is  40 .

∵ 40gm NaOH contains 16gm of oxygen 

∴ 100gm of NaOH contains 16/40 × 100 = 40% oxygen.  

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