A metallic element is converted into a compound 'A' after a series of reactions. Compound 'A' turns red litmus blue. 'A' on reaction with another compound B which turns blue litmus red gave a compound 'C' which responded to litmus test like compound 'B'. 'C' on further reaction with 'A' gave a compound 'D' Which did not respond to litmus test. Identify the correct sequence of steps for the formation of A, B, C and D. (a) NaOH + H_(2)SO_(4) rarr NaHSO_(4) + H_(2)O (b)4Na + O_(2) rarr 2Na_(2)O (c) NaHSO_(4) + NaOH rarr Na_(2)SO_(4) + H_(2)O ltBrgt (d) Na_(2)O + H_(2)O rarr 2NaOH

A metallic element is converted into a compound 'A' after a series of

1.	A metallic element is converted into a compound 'A' after a series of reactions. Compound 'A' turns red litmus blue. 'A' on reaction with another compound B which turns blue litmus red gave a compound 'C' which responded to litmus test like compound 'B'. 'C' on further reaction with 'A' gave a compound 'D' Which did not respond to litmus test. Identify the correct sequence of steps for the formation of A, B, C and D. (a) NaOH + H_(2)SO_(4) rarr NaHSO_(4) + H_(2)O (b)4Na + O_(2) rarr 2Na_(2)O (c) NaHSO_(4) + NaOH rarr Na_(2)SO_(4) + H_(2)O ltBrgt (d) Na_(2)O + H_(2)O rarr 2NaOH
Answer» acbd bcad bdac dbac Solution :(i) `4NA + O_(2) rarr 2Na_(2)O` (II) `Na_(2)O + H_(2)O rarr 2NaOH` (III) `NaOH + H_(2)SO_(4) rarr NaHSO_(4) + H_(2)O` ltBrgt (iv) `NaHSO_(4) + NaOH rarr Na_(2)SO_(4) + H_(2)O`