Question

A colourless salt colours a bunsen flame as golden yellow, and, also turns moistened litmus paper into blue colour. The substance is:

• A. $N{a}_{2}C{O}_3$
• B. $NaCl$
• C. $Cu(OH{)}_2$
• D. $K_{2}C{O}_3$

Answer 1

The correct option is A $N{a}_{2}C{O}_3$

Golden yellow colour in bunsen flame indicates the presence of sodium. The colour change of moist litmus, from red to blue, indicates alkaline medium. Hence, the substance is sodium carbonate ($N{a}_{2}C{O}_3$).

Hence, the correct option is $\left(A\right)$.