NEET UG CHEMISTRY Multiple Choice Questions (MCQs)

NEET UG - Organic Chemistry Questions (286 to 300)

286. Which of the following reagents is used to detect the presence of nitrogen in an organic compound?
     a) Sodium picrate
     b) Sodium fusion extract
     c) Bromine water
     d) Silver nitrate
     Answer: b) Sodium fusion extract
287. Which functional group is detected using the Ferric chloride test?
     a) Alcohol
     b) Carbonyl
     c) Phenolic
     d) Amine
     Answer: c) Phenolic
288. Which compound is prepared by the reaction of acetanilide with nitrous acid?
     a) Aniline yellow
     b) p-Nitro acetanilide
     c) Iodoform
     d) Mohr’s salt
     Answer: b) p-Nitro acetanilide
289. The preparation of potash alum involves the reaction between:
     a) K2SO4 and Al2(SO4)3
     b) K2SO4 and Na2SO4
     c) NaOH and AlCl3
     d) K2SO4 and NaOH
     Answer: a) K2SO4 and Al2(SO4)3
290. In the detection of amino groups, which reagent is commonly used?
     a) NaOH
     b) Bromine water
     c) Ninhydrin
     d) Silver nitrate
     Answer: c) Ninhydrin
291. Which functional group is detected by the blue color in the alkaline solution of sodium nitroprusside?
     a) Hydroxyl group
     b) Carbonyl group
     c) Amino group
     d) Carboxyl group
     Answer: c) Amino group
292. Which of the following salts is used in the preparation of Mohr’s salt?
     a) K2SO4
     b) Na2SO4
     c) NH4Cl
     d) NH4Fe(SO4)2
     Answer: d) NH4Fe(SO4)2
293. The titrimetric exercise of oxalic acid vs KMnO4 involves:
     a) Acid-base neutralization
     b) Redox titration
     c) Precipitation reaction
     d) Complexometric titration
     Answer: b) Redox titration
294. Which of the following is the correct method to prepare iodoform?
     a) Acetanilide and iodine in presence of NaOH
     b) p-Nitro acetanilide and iodine in presence of NaOH
     c) Ethanol and iodine in presence of NaOH
     d) Iodine and acetanilide in presence of HCl
     Answer: c) Ethanol and iodine in presence of NaOH
295. In the preparation of lyophilic sols, which substance is typically used?
     a) Gelatin
     b) Aluminum hydroxide
     c) Sodium chloride
     d) Sodium hydroxide
     Answer: a) Gelatin
296. Which cation is involved in the detection of copper in qualitative analysis?
     a) Cu2+
     b) Fe3+
     c) Pb2+
     d) Ni2+
     Answer: a) Cu2+
297. In the experiment for the enthalpy of solution of CuSO4, what is being measured?
     a) Heat absorbed during dissolution
     b) Heat released during dissolution
     c) Change in volume during dissolution
     d) Change in pressure during dissolution
     Answer: b) Heat released during dissolution
298. Which of the following is a principle of the kinetic study of the reaction of iodide ions with hydrogen peroxide?
     a) First-order reaction
     b) Zero-order reaction
     c) Pseudo-first-order reaction
     d) Second-order reaction
     Answer: c) Pseudo-first-order reaction
299. Which of the following ions is present in Mohr’s salt?
     a) Fe3+
     b) Fe2+
     c) Cu2+
     d) Pb2+
     Answer: b) Fe2+
300. What is the color of the solution obtained when potassium permanganate (KMnO4) is titrated with oxalic acid?
     a) Purple
     b) Colorless
     c) Brown
     d) Yellow
     Answer: b) Colorless

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