The indicators which turn red in acid solution are :

(a) turmeric and litmus

(b) phenolphthalein and methyl orange

(c) litmus and methyl orange

(d) phenolphthalein and litmus

Q. Which of the following indicator gives pink colour in a​
basic solution?​
(A) Methyl orange​
(B) Turmeric​
(C) Phenolphthalein​
(D) Red litmus paper​

Q. Mention the colour changes observed when the following indicators are added to acids:
(a) Alkaline phenolphthalein solution.
(b) Methyl orange solution.
(c) Neutral litmus solution.

Q. Identify the following solutions, whether they are acid or alkali.

Solution	Change in Indicator			Acid/Alkali
	Litmus	Phenolphthalein	Methyl orange
1.	...	No change	...
2.	...	...	Orange colur turns red
3.	Red litmus turns blue	...	...

Q. Which of the following is incorrectly matched?

	Indicator	Colour change in basic medium
(1)	Litmus paper	Red to blue
(2)	Methyl orange	Orange to red
(3)	Phenolphthalein	Colourless to pink
(4)	Turmeric	Yellow to reddish brown

Q. Match the following:
$$\begin{array}{cc}\text{a) Litmus}& \text{1) Blue in acidic, pink in basic soils}\\ \text{b) Methyl orange}& \text{2) Red in acidic, yellow in basic solutions}\\ \text{c) Phenolphthalein}& \text{3) Blue in basic, red in acidic solutions}\\ \text{d) Color of Hydrangea}& \text{4) Pink in basic, colorless in acidic solutions}\end{array}$$