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Chem > INDICATORS > Flashcards

INDICATORS Flashcards

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1
Q

What are various colours of Methyl Orange indicator under different pH?

A

Acid- Red (Changes at 4)
Neutral- Orange
Alkali- Yellow

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2
Q

What are various colours of Universal indicator under different pH?

A

Acid- Red to Orange
Neutral- Green
Alkali- Light Blue to Purple

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3
Q

What are various colours of Screened Methyl Orange indicator under different pH?

A

Acid- Red (0-3.2)
Neutral- Grey (3.2-4.2)
Alkali- Green (4.2++)

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4
Q

What are various colours of phenolphtalein indicator under different pH?

A

Acid- Colourless
Neutral- NIL
Alkali- Red (10)

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5
Q

What are various colours of thymolphtalein indicator under different pH?

A

9 and above- Blue

Anything else- Colourless

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Chem (14 decks)

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