Turmeric paper changes colour to red or reddish-brown when dipped in a basic solution. It remains yellow in an acidic or neutral solution. Therefore, if the turmeric paper turns reddish-brown, the solution is basic. If it stays yellow, we cannot distinguish between acidic and neutral solutions using only turmeric. To differentiate between acidic and neutral, one would typically need another indicator like blue litmus paper or China rose indicator, as acidic solutions turn blue litmus red and China rose indicator to dark pink/magenta, while neutral solutions cause no change.