Title 13. HYDROCARBONS.pdf ✅

BUY COURSE FROM STORE TO GET INSTANT ANSWER AND EXPLANATION OF EACH QUESTION SPARK PCMB | DOWNLOAD APP NOW| +91-920-630-6398 13. HYDROCARBONS #QID# 17994 (1.) Which derivative of phenol gives effervescence with O3 ? (a.) a-Cresol (b.) Catechol (c.) 2, 4, 6-Trinitrophenol (d.) 2, 4, 6-Tribromophenol ANSWER: c Exp: 2, 4, 6-Trinitrophenol is highly acidic so it reacts with NaHCO3 #QID# 2637 (2.) Propene on reaction with hypochlorous acid to give (a.) (b.) (c.) (d.) ANSWER: a EXPLANATION: (a) CH3CH = CH2 + HO̅Cl + → CH3 − CH − CH2
BUY COURSE FROM STORE TO GET INSTANT ANSWER AND EXPLANATION OF EACH QUESTION SPARK PCMB | DOWNLOAD APP NOW| +91-920-630-6398 Propyene hypochlorous | | acid OH Cl propene chlorohydrin #QID# 18037 (3.) compound X; is : (a.) (b.) (c.) (d.) all are correct ANSWER: b Exp: #QID# 2700 (4.) Lindlar ′s catalyst → CH3 − C ≡ C − CH3A, the compound A is (a.) cis-2-butene (b.) trans-2-butene (c.) iso-butene (d.) 1-butene ANSWER: b #QID# 16955 (5.) Identify relation between these two compounds:
BUY COURSE FROM STORE TO GET INSTANT ANSWER AND EXPLANATION OF EACH QUESTION SPARK PCMB | DOWNLOAD APP NOW| +91-920-630-6398 (a.) homomers (b.) enantiomers (c.) diastereomers (d.) differentccmpounds ANSWER: b EXPLANATION: (b) #QID# 17951 (6.) Which of the following is not aromatic? (a.) (b.) (c.) (d.) ANSWER: d #QID# 17974 (7.) The relative reactivities of benzene, aniline, nitrobenzene and toluene towards aromatic electrophilic substitution are :
BUY COURSE FROM STORE TO GET INSTANT ANSWER AND EXPLANATION OF EACH QUESTION SPARK PCMB | DOWNLOAD APP NOW| +91-920-630-6398 (a.) benzene  toluene aniline nitrobenzene (b.) nitrobenzene aniline toluene  benzene (c.) toluene  aniline  nitrobenzene  benzene (d.) aniline  toluene  benzene  nitrobenzene ANSWER: d #QID# 2445 (8.) Pure methane can be produced by (a.) Wurtz reaction (b.) Kolbe’s electrolytic method (c.) Soda lime decarboxylation (d.) reduction with H2 ANSWER: c EXPLANATION: (c) Methane cannot be produced by Wurtz reaction, Kolbe’s electrolytic method and reduction with H2because, it has one carbon atom. Pure methane can be produced by the decarboxylation of sodium acetate. CH3COONa + NaOH CaO → CH4 + Na2CO3 Soda lime methane #QID# 18031 (9.) Picric acid is yellow coloured compound, its chemical name : (a.) m-nitrobenzoic acid (b.) 2, 4, 6-trinitrophenol (c.) trinitrotoluene (d.) trinitroaniline ANSWER: b #QID# 16972    