Which of the following pairs of indicator and its colour in given medium are correct?

Litmus - Blue in acidic medium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Methyl orange - Red in acidic medium

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Phenolphthalein - Pink in basic medium

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Litmus - Red in basic medium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct options are
B Methyl orange - Red in acidic medium
C Phenolphthalein - Pink in basic medium
Acid-base indicators are those substances which show different colours in acidic and basic medium. Thus, they help to identify the nature of solution.
The table given below shows the list of indicators and the colour change they show in acidic or basic medium.
$\begin{matrix} Indicator & Colour in acidic medium & Colour in basic medium Litmus & Red & Blue Methyl orange & Red & Yellow Phenolphthalein & Colourless & Pink \end{matrix}$

Suggest Corrections

Similar questions

Q. Match the following:

\begin{matrix} A) L i t m u s & 1) B l u e i n a c i d i c, p i n k i n b a s i c s o i l s B) M e t h y l o r a n g e & 2) R e d i n a c i d i c, y e l l o w i n b a s i c s o l u t i o n s C) P h e n o l p h t h a l e i n & 3) B l u e i n b a s i c, r e d i n a c i d i c s o l u t i o n s D) C o l o u r o f H y d r a n g e a & 4) P i n k i n b a s i c, c o l o r l e s s i n a c i d i c s o l u t i o n s \end{matrix}

Question 4

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are
(a) red and blue.
(b) blue and red.
(c) pink and colourless.
(d) colourless and pink

Choose the correct option regarding the statements given below:

Statement 1: Blue litmus changes into red in acidic medium.
Statement 2: Red litmus changes into blue in basic medium.
Statement 3: Blue litmus changes into red in basic medium.
Statement 4: Red litmus changes into blue in acidic medium.

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

Q. What volume of

0.1 M N a O H

will be required to neutralize

100

mL of

0.1 M H_{3} P O_{4}

using methyl red indicator to change the colour form pink (acidic medium) to yellow (basic medium)?

Join BYJU'S Learning Program