Tests Flashcards by Jade Rayquaza | Brainscape

Q

Test for Alkene

A

Shake with bromine water

Turns colourless

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Q

Test for primary/ secondary alcohol

A

Acidified potassium dichromate on heating

Orange to green

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Q

Test for Aldehyde

A

Tollen’s Reagent -silver mirror

Fehling’s solution - red PPT

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Q

Test for carboxylic acid

A

Na2CO3 - effervescence

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Q

Test for carbonate

A

Acid - fizzing

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Q

Test for sulfate

A

Add HNO3 (to eliminate BaCO3 producing white PPT)

Add BaNO3 - white PPT

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Q

Hydroxide test

A

Add MgSO4 - produces white PPT Mg(OH)2

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Q

Cl- test

A

Acidified AgNO3 - white PPT

then add dilute NH3 - PPT dissolves

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Q

Br- test

A

Acidified AgNO3

Cream PPT Dissolves in concentrated NH3

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Q

I- test

A

Add acidified AgNO3

Yellow PPT will not dissolve in concentrated NH3

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Q

Test for Ag+

A

NaCl

White PPT that dissolves in dilute NH3

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Q

Test for Ba2+

A

Na2SO4

White PPT of BaSO4

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Q

Test for Mg2+

A

NaOH

White PPT of Mg(OH)2

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Q

Test for NH4+

A

Add NaOH or heat

DAMP litmus turns blue

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