Question

Change of Na2CO3. 10H20 to Na2CO3. H20 on exposure to air is called:
(i) efflorescence
(ii) effervescence
(iii) fluorescence
(iv) luminescence ​

Answer 1

$\huge{\underline{\underline{\boxed{\mathscr{\red{Aɴsᴡᴇʀ\: ࿐}}}}}}$

${ \textsf{ \textbf{ \orange{ \underline{(i) efflorescence }}}}}$

Answer 2

Answer:

(III) fluorescence

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