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Quiz 15
Mdcat-past-papers - NMDCAT Quiz
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Board: NMDCAT |
281. Alkyl halide is formed on reaction with:
PCl₃
P₂O₅
Na metal
CH₃MgI
282. Phenol and ethanol react with Na metal to form salt and ----.
Both form H
Both form water
H₂ and phenol form water
H and Na oxide
283. 1-propanol reacts with HCl in the presence of ZnCl₂:
immediately
on heating
after 5 min
do not react at all
284. In aldol condensation, carbanion acts as:
electrophile
nucleophile
does not produce at all
remain neutral
285. Formula of wood spirit is:
CH₃OH
C₂H₅OH
C₃H₇OH
C₄H₉OH
286. Alcohol and phenol can be differentiated by:
Iodoform test
halogenation
silver's test
Lucas test
287. Lucas test is used for the identification of:
Alkyl halides
Alcohols
Alkenes
Carboxylic acids
288. Which of the following reactions differentiates alcohol from phenol?
Lucas test
Iodoform test
Nitration
Halogenation
289. The order of reactivity of alcohol when C–O bond breaks is:
3° > 2° > 1°
1° > 2° > 3°
2° > 1° > 3°
3° > 1° > 2°
290. The increasing order of reactivity of alcohols towards nucleophile is:
2-methyl-2-pentanol < 3-methyl-2-pentanol < 2-methyl-1-pentanol
2-methyl-2-pentanol > 3-methyl-2-pentanol > 2-methyl-1-pentanol
2-methyl-1-pentanol < 3-methyl-2-pentanol < 2-methyl-2-pentanol
2-methyl-1-pentanol > 3-methyl-2-pentanol > 2-methyl-2-pentanol
291. The most reactive alcohol towards Lucas reagent is:
2-butanol
2-methyl-2-butanol
2-methyl-1-butanol
2,2-dimethyl-1-butanol
292. Relative acidic strength of alcohol, phenol, water, and carboxylic acid is:
Carboxylic acid > alcohol > phenol > water
Carboxylic acid > phenol > water > alcohol
Phenol > carboxylic acid > alcohol > water
Water > alcohol > phenol > carboxylic acid
293. Which one of the following was used as one of the earliest antiseptic and disinfectant:
Phenol
Ether
Ethanol
Methanol
294. Which one of the following is an appropriate name of above compound?
1,3,6-trinitrophenol
m-Nitrophenol
Tartaric acid
Picric acid
295. Which of following compound is solid at room temperature?
Ethanol
Butane
Methanol
Phenol
296. Benzene is formed when Na reacts with which of the following?
Alcohol
Butyl alcohol
Propanol
Phenol
297. When phenol reacts with formaldehyde, which of the following product is produced?
Adduct
Hydronium ion
Oxonium ion
Phenoxide ion
298. If phenol is treated with 3 moles of conc.HNO₃ in the presence of H₂SO₄ what will be the product?
o-Nitro phenol
p-Nitro phenol
o-Nitro phenol & p-Nitro phenol
Picric acid
299. Which of the following is correct regarding phenol:
Phenol and water are equally acidic
Phenol is less acidic than carboxylic acid
Phenol is less acidic than water
Phenol is less acidic than ethanol
300. Phenols are very reactive towards:
Oxidizing agent
Reducing agent
Dehydrating agent
Hygroscopic agent
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