A colourless solid substance (A) on heating evolved CO_2 and also gave a white residue, soluble in water. Residue also gave CO_2 when treated with dilute HCI.

A colourless solid substance (A) on heating evolved CO_2 and also gave

1.	A colourless solid substance (A) on heating evolved CO_2 and also gave a white residue, soluble in water. Residue also gave CO_2 when treated with dilute HCI.
Answer» <html><body><p>`Na_(2)<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a>)_(3)`<br/>`NaHCO_(3)` <br/>`CaCO_(3)`<br/>`Ca(HCO_(3))_(2)`</p>Solution :`2NaHCO_(3)tounderset(downarrow)(<a href="https://interviewquestions.tuteehub.com/tag/2hci-1835823" style="font-weight:bold;" target="_blank" title="Click to know more about 2HCI">2HCI</a>)("Soluble in water")Na_(2)CO_(3)+H_(2)O+CO_(2)uparrow` <br/>`NaCI+H_(2)O+CO_(2)uparrow`</body></html>