A student placed a pinch of solid sodium hydrogencarbonate on a strip of red litmus paper. He found that the colour of red litmus paper strip :(1) turned green (2) turned blue(3) turned violet (4) did not change

A student placed a pinch of solid sodium hydrogencarbonate on a strip

1.	A student placed a pinch of solid sodium hydrogencarbonate on a strip of red litmus paper. He found that the colour of red litmus paper strip :(1) turned green (2) turned blue(3) turned violet (4) did not change
Answer» A student placed a pinch of solid sodium hydrogencarbonate on a strip of red litmus paper. He found that the colour of red litmus paper strip : (1) turned green (2) turned blue (3) turned violet (4) did not change