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UHS Past Papers /
Chemistry /
Chap No 14 /
Quiz 3

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MDCAT - UHS Past Papers - Chemistry - Chap No 14 Quiz

Attempt 10 MCQs on MDCAT - UHS Past Papers - Chemistry - Chap No 14 | Quiz 3

21. Aqueous solutions of Iodine and sodium hydroxide were mixed in a round bottom flask at 70°C. Following chemical reaction: 3I₂ + 6NaOH → NaIO₃ + NaI + H₂O This reaction is termed as:

Redox reaction
Free radical reaction
Precipitation reaction
Substitution reaction

22. Which of the following alcohol can give iodoform reaction?

Methanol
1-Butanol
1-Propanol
Ethanol

23. Which of the following will give a positive test with Tollen's reagent?

Aldehydes
Tertiary alcohols
Ketones
Carboxylic acids

24. Tollen's reagent is ammonical silver nitrate solution, which identifies a functional group X with observation O. Identify X and O:

X = Ketone, O = Grey precipitate
X = Ketone, O = Silver mirror
X = Aldehyde, O = Silver mirror
X = Aldehyde, O = Red precipitate

25. The appearance of silver mirror in Tollen's test indicates the presence of which of the following?

Ketone
An acid
Aldehyde
Alcohol

26. The blue color of Fehling's solution changes to red when warmed with an aldehyde due to the formation of:

NO₂
Cu₂O
Ag
SO₂

27. Reaction of HCN with formaldehyde is a/an:

Nucleophilic addition reaction
Nucleophilic substitution reaction
Electrophilic addition reaction
Electrophilic substitution reaction

28. Which of the following is also called silver mirror test?

Benedict's solution test
Fehling's solution test
Iodoform test
Tollen's reagent test

29. Acetaldehyde undergoes oxidation to produce acetic acid, in this reaction oxidizing agent used is:

H2SO4
LiAlH4
K2Cr2O7
NaBiH4

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