Question

4. The substance used as indicator is
a. turmeric
b. litmus
c. china rose petals
d. all of these​

Answer 1

Answer:

all of these

Explanation:

these are all indicators and identify acid and bases

Answer 2

Answer:

d. all of these​

Explanation

Indicators are chemical compounds that tell us whether a substance is acidic or basic by changing its colour. ... The indicators that are obtained from plants are known as natural indicators. Examples – Turmeric, china rosa, red cabbage and grape juice.

Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often adsorbed onto filter paper to produce one of the oldest forms of pH indicator .

PLS MARK AS BRAINLIEST !!!!!!!!!!!!!!!!!!!!!!!!!!