This Question: 1 pt 10 Write the negation of the proposition. Then state the tru

Question

This Question: 1 pt 10 Write the negation of the proposition. Then state the truth value of the original proposition and its negation Saturday does not come before Sunday Write the negation of the proposition Choose the correct answer below OA. Sometimes Saturday does not come before Sunday O B. Sunday does come before Saturday ° C. It is not true that Saturday comes before Sunday 0 D. Saturday comes before Sunday The truth value of the original proposition is The truth value of the negation is Click to select your answer

Explanation / Answer

Organic chemistry

B. functional group tests

distinguishing between pair of compounds

a) secondary alcohol (first) and primary alcohol (second)

Reagent : PCC [oxidant] : converts secondary alcohol to ketone and primary alcohol to an aldehyde

The ketone and aldehyde are then reacted with Tollen's reagent

Secondary alcohol gives a negative test

Primary alcohol gives a positive test with Tollen's reagent and forms silver mirror.

b) An alcohol (first) and a ketone (second)

Reagent : 2,4-DNP, H+

Ketones form a deep orange/yellow colored hydrazone derrivative with 2,4-DNP reagent : positive

Alcohols : negative test

c) both ketones

Reagent : Iodoform

The second alcohol is a terminal methyl ketone which gives positive test with iodoform reagent

The first alcohol gives a negative test with iodoform reagent.

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Two compounds of ,

formula = C4H8O

IHD = 1

a) A gives positive test with Tollen's reagent, but negative test with Iodoform

aldehyde present

Compound,

CH3-CH2-CH2-CHO

b) B forms yellow precipitate with iodoform and negative test with Tollen's reagent

ketone present

Compound

CH3-CO-CH2-CH3

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