Question

plzz give me answer plzz help me plzz help ur sister plzzz it's urgent plzzz help me
class 7
chapter acid bases and salt​

Answer 1

Answer:

indicators are the substances which is used to test whether the substance is acidic or basic....

indicators are of three types

natural = litmus

synthetic = methyl orange

olfactory = onion

if we take an example of litmus paper so the natural colour of litmus is purple

1)when you put it in a acidic solution it changes it colour red

2)in basic solution it shows blue colour

3)if the water is pure so litmus paper doesn't changes its colour

Answer 2

Answer:

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• Indicators are those substances which tell us whether a substance is acidic or basic by change in colour. For e.g., litmus solution. Olfactory indicators: Those substances whose odour changes in acidic or basic media are called lfactory indicators.