Hydrocarbons PYQs Set 14 (PDF)

Set 14 of 15 · Questions 391-420 of 435

In the print window choose “Save as PDF”. The file prints without a web address or date line.

Mere Teacher · Previous Year Questions NEET Chemistry · Hydrocarbons · Set 14 (Q391-420)
Scan or visit mereteacher.com for free PYQ practice, timed CBT tests, step-by-step solutions and BroBot AI. Answers and solutions are free with a sign-up.
391. $Identify Z in the sequence of reactions : CH_{3} CH_{2} CH = CH_{2} HBr/H_{2} O_{2} Y C_{2} H_{5} ONa Z$ (1) $C H_{3} - (C H_{2})_{3} - O - C H_{2} C H_{3}$ (2) $(C H_{3})_{2} C H - O - C H_{2} C H_{3}$ (3) $C H_{3} (C H_{2})_{4} - O - C H_{3}$ (4) $C H_{3} C H_{2} - C H (C H_{3}) - O - C H_{2} C H_{3}$ 392. $Which of the following is formed when propene is heated with bromine at high temperature?$ (1) $1,2-Dibromopropane$ (2) $1-Bromopropane$ (3) $2-Bromopropane$ (4) $3-Bromopropene$ 393. $What are the suitable reagent for following conversion$ (1) $B r_{2} / F e B r_{3}, K M n O_{4}, H N O_{3} / H_{2} S O_{4}$ (2) $K M n O_{4}, B r_{2} / F e B r_{3}, H N O_{3}$ (3) $H N O_{3}, B r_{2} / F e B r_{3}, K M n O_{4}$ (4) $H N O_{3}, K M n O_{4}, B r_{2} / F e B r_{3}$ 394. $The product (C) in the below mentioned reaction is:$ (1) $Propan-1-ol$ (2) $Propene$ (3) $Propyne$ (4) $Propan-2-ol$ 395. $The major product(s) obtained in the following reaction is/are : (i) KO^{1} Bu (ii) O_{3} / M e_{2} S$ (1) (2) (3) (4) 396. $The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is$ (1) $salicylaldehyde$ (2) $salicylic acid$ (3) $phthalic acid$ (4) $benzoic acid$ 397. $Consider the following reactions, The compound [P] is:$ (1) (2) (3) (4) 398. $The major product obtained in the following conversion is: B r_{2} (1 eq .) MeOH$ (1) (2) (3) (4) 399. $What is the number of moles of ethane obtained from 2 n moles of bromomethane using 2 n moles of sodium atoms in dry ether medium?$ (1) $4 n$ (2) $3 n$ (3) $2 n$ (4) $n$ 400. $The most suitable reagent for the following conversion, is$ (1) $H g^{2 +} / H^{+}, H_{2} O$ (2) $N a / liquid N H_{3}$ (3) $H_{2}, P d / C, quinoline$ (4) $Z n / H C 1$ 401. $In the given reactions identify the reagent A and reagent B$ (1) $A - CrO_{3} B - CrO_{3}$ (2) $A - CrO_{3} B - CrO_{2} Cl_{2}$ (3) $A - CrO_{2} Cl_{2} B - CrO_{2} Cl_{2}$ (4) $A - CrO_{2} Cl_{2} B - CrO_{3}$ 402. $The treatment of benzene with isobutene in the presence of sulphuric acid gives :$ (1) $isobutyl benzene$ (2) $tert-butyl benzene$ (3) $n-butyl benzene$ (4) $no reaction$ 403. $An alkene X on ozonolysis gives a mixture of Propan-2one and methanal. What is X?$ (1) $Propene$ (2) $2-Methylpropene$ (3) $2-Methylbut-1-ene$ (4) $2-Methylbut-2-ene$ 404. $In the following reaction, H_{3} C - C \equiv CH red hot iron tube 873 K A, the number of sigma(σ) bonds present in the product A, is$ (1) $2l$ (2) $9$ (3) $24$ (4) $18$ 405. $Phenol is heated with a solution of mixture of KBr and KBrO3. The major product obtained in the above reaction is :$ (1) $2-Bromophenol$ (2) $3-Bromophenol$ (3) $4-Bromophenol$ (4) $2, 4, 6 -Tribromophenol$ 406. $The major product of the following reaction is: (i) KOH alc . (ii) NaN H_{2} in liq . N H_{3}$ (1) $C H_{3} CH = C = C H_{2}$ (2) $C H_{3} C H_{2} C H (N H_{2}) - C H_{2} N H_{2}$ (3) $C H_{3} CH = CHC H_{2} N H_{2}$ (4) $C H_{3} C H_{2} C \equiv CH$ 407. $The reaction of chloroform with alcoholic KOH and p-toluidine forms :$ (1) (2) (3) (4) 408. $In the following reaction sequence the major products A and B are:$ (1) (2) (3) (4) 409. $Methane can be converted into ethane by the reactions$ (1) $chlorination followed by the reaction with alcoholic KOH$ (2) $chlorination followed by the reaction with aqueous KOH$ (3) $chlorination followed by Wurtz reaction$ (4) $chlorination followed by decarboxylation.$ 410. $An organic compound 'A' C_{4} H_{8} on treatment with K M n O_{4} / H^{+} yields compound 'B' C_{3} H_{6} O .Compound 'A' also yields compound 'B' an ozonolysis. Compound 'A' is :$ (1) $2-Methylpropene$ (2) $1-Methylcyclopropane$ (3) $But-2-ene$ (4) $Cyclobutane$ 411. $When C H_{3} C H_{2} CHC l_{2} is treated with NaN H_{2}, the product formed is$ (1) $C H_{3} - CH = C H_{2}$ (2) $C H_{3} - C \equiv CH$ (3) $C H_{3} C H_{2} CH (N H_{2})_{2}$ (4) $C H_{3} C H_{2} CH (Cl) N H_{2}$ 412. $The angle strain in cyclobutane is$ (1) $19^{\circ} 22^{’}$ (2) $9^{\circ} 44^{’}$ (3) $24^{\circ} 44^{’}$ (4) $29^{\circ} 16^{’}$ 413. $Picric acid is$ (1) (2) (3) (4) 414. $The homologue of ethyne is :$ (1) $C2H2$ (2) $C2H6$ (3) $C3H8$ (4) $C3H4$ 415. $Picric acid is$ (1) (2) (3) (4) 416. $(i) Bra, hv A \to (iii) O_{3} (ii) KOH (alc .) (iv) (CH_{3})_{2} S (v) NaOH (aq) + Δ In the following reaction A is:$ (1) (2) (3) (4) 417. $[P] on treatment with Br_{2} / FeBr_{3} in CCl_{4} produced a single isomer C_{8} H_{7} O_{2} while heating [P] with sodalime gave toluene. The compound [P] is$ (1) (2) (3) (4) 418. $A solution of -chloroaniline, -chlorophenol and -chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of to give fraction . The left over organic phase was extracted with dilute solution to give fraction . The final organic layer was labelled as fraction . Fraction and , contain respectively :$ (1) $m -chlorobenzoic acid, m -chlorophenol and m -chloroaniline$ (2) $m -chlorophenol, m -chlorobenzoic acid and m -chloroaniline$ (3) $m -chloroaniline, m -chlorobenzoic acid and m -chlorophenol$ (4) $m -chlorobenzoic acid, m -chloroaniline and m -chlorophenol$ 419. $Major product P of above reaction, is :$ (1) (2) (3) (4) 420. $Predict the product,$ (1) (2) (3) (4)