An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
Base |
Acid |
End point |
(1) Strong |
Strong |
Pinkish red to yellow |
(2) Weak |
Strong |
Yellow to pinkish red |
(3) Strong |
Strong |
Pink to colourless |
(4) Weak |
Strong |
Colourless to pink |