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Chem Lab > Viva > Flashcards

Viva Flashcards

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1
Q

Name a test to detect an alcoholic group

A

Ceric ammonium nitrate test

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2
Q

Mention one reagent used to test alcohol

A

Lucas reagent
Ceric ammonium nitrate

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3
Q

What happens when ceric ammonium nitrate is added to alcohol

A

Pink or red colour is obtained

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4
Q

Which organic compound is identified by using ceric ammonium nitrate

A

Alcohol

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5
Q

What colour is seen when ceric ammonium nitrate is added to alcohol

A

Pink or red colour

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6
Q

Lucas reagent

A

A mixture of anhyd. ZnCl2 and conc HCl

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7
Q

Name the reagent used to distinguish between primary, secondary and tertiary alcohol

A

Lucas reagent test

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8
Q

What happens when a primary alcohol is treated with Lucas reagent

A

White turbidity appears only on heating

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9
Q

What happens when a secondary alcohol is treated with Lucas reagent

A

White turbidity appears after five to 10 mins

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10
Q

What happens when a tertiary alcohol is treated with Lucas reagent

A

White turbidity appears immediately

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11
Q

Which alc immediately forms turbidity with Lucas reagent

A

Tertiary

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12
Q

Which alcohol forms turbidity with Lucas reagent in 5 mins

A

Secondary

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13
Q

Which alcohol do not form turbidity when treated with Lucas reagent at room temp

A

Primary

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14
Q

Which organic compound gives violet colour with neutral ferric chloride solution

A

Phenol

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15
Q

Which organic compound answers pthalein fusion test

A

Phenol

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16
Q

Name the product obtained in pthalein fusion test

A

Phenolapthein

17
Q

Mention the reagents used in pthalein fusion test

A

Phenol+pthalic anhydride + conc. h2so4

18
Q

How do you detect phenol

A

Natural ferric chloride test
Pthalein fusion test

19
Q

Which colour is obtained when phenol undergoes pthalic fusion test

A

Pale pink colour

20
Q

What is 2,4-DNP reagent test used

A

To detect carbonyl group (aldehyde or ketone)

Chem Lab (4 decks)

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