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UHS Past Papers /
Chemistry /
Chap No 14 /
Quiz 2

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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 2

11. Consider the following reaction: R–CHO + 2[Ag(NH₃)₂]OH → R–COOH + 2Ag + H₂O + 2NH₃

Fehling test
Ninhydrin test
Benedict's test
Tollen's test

12. A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product:

Acetone
Acetic acid
Dimethyl ether
Acetaldehyde

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

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

14. Which one of the following test is given by both aldehyde and ketone?

Silver mirror test
Fehling's solution test
2,4-DNPH test
Benedict's solution test

15. Propanone can be prepared from propyne by:

Passing a mixture of propyne and steam over a catalyst, Mg at 420°C
Passing a mixture of propyne and ethanol over a catalyst, Zn chromate
Boiling propyne with water in presence of HgSO₄ and H₂SO₄
Treating propyne with iodine and NaOH

16. In the below reaction, the nucleophile is: HCHO + HCN → OH–CH₂–CN

CN⁻
HCl
Cl⁻
OH⁻

17. Which group gives a yellow precipitate of triiodomethane when warmed with alkaline aqueous iodine?

Methyl ketone group
Aldehyde group
Carboxyl group
Hydroxyl group

18. It is a general formula of:

Acetone 2,4-Dinitrophenyl Hydazine
1,3-Dinitrophenyl Hydazone
Phenyl Hydazone
Acetone 2,4-Dinitrophenyl Hydazone

19. Which one of the following reagents is used to distinguish between aldehydes and ketones?

Alkaline iodine
Tollen's reagent
Bromine
2,4-DNPH

20. Which type of reaction takes place when a carbonyl compound is taken with a mixture of NaCN and an acid?

Substitution reaction
Electrophilic addition reaction
Nucleophilic addition reaction
Displacement reaction

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