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`
(d) `Na_(2)O + H_(2)O rarr 2NaOH`

Options

A. 1324
B. 2314
C. 2413
D. 4213

Answer

C

Explanation

(i) `4Na + O_(2) to 2Na_(2)O`
(ii) `Na_(2)O + H_(2)O to 2NaOH`
(ii) `NaOH + H_(2)SO_(4) to NaHSO_(4) + H_(2)O`
(iv) `NaHSO_(4) + NaOH to Na_(2)SO_(4) + H_(2)O`