Practice Questions

Q36. Consider the given reaction, the Product A is: (1) (2) (3) (4)

Q36. Among the given species the Resonance stabilised carbocations are: (1) (C) and (D) only (2) (A), (B) and (D) only (3) (A) and (B) only (4) (A), (B) and (C) only

Q36.Which of the following is an aromatic compound? JEE Main 2021 (17 Mar Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q36.The gas ′A′ is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV -radiations in stratosphere. The intermediates formed initially from the gas ′A′ are: (1) (2) (3) (4)

Q36.Which one of the following metals forms interstitial hydride easily ? (1) Cr (2) Fe (3) Mn (4) Co JEE Main 2021 (25 Jul Shift 2) JEE Main Previous Year Paper

Q36.Excess of isobutane on reaction with Br2 in presence of light at 125°C gives which one of the following, as the major product? JEE Main 2021 (26 Aug Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q36.Which one of the following compounds is non-aromatic? (1) (2) (3) (4)

Q36.Which of the following forms of hydrogen emits low energy β− particles? (1) Deuterium 21H (2) Proton H+ (3) Tritium 31H (4) Protium 11H

Q36.The INCORRECT statement regarding the structure of C60 is : (1) The six-membered rings are fused to both six and (2) Each carbon atom forms three sigma bonds. five-membered rings. (3) The five-membered rings are fused only to six- (4) It contains 12 six-membered rings and 24 five- membered rings. membered rings.

Q36.The incorrect statement about B2H6 is : JEE Main 2021 (25 Feb Shift 1) JEE Main Previous Year Paper (1) All B −H −B angles are of 120° (2) The two B −H −B bonds (bridged and terminal) are not of same length. (3) Terminal B −H bonds have less p -character (4) Its fragment, BH3, behaves as a Lewis acid. when compared to bridging bonds.

Q36.Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. H2SO4 followed by treatment with NaOH? JEE Main 2021 (24 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q36. H+ / H2O In the following sequence of reactions, C3H6 ⟶ A KIO + C. The compounds B and C respectively are : dilKOHB JEE Main 2021 (01 Sep Shift 2) JEE Main Previous Year Paper (1) CI3COOK, CH3I (2) CH3I, HCOOK (3) CI3COOK, HCOOH (4) CHI3, CH3COOK

Q36.Compound with molecular formula C3H6O can show: (1) Positional isomerism (2) Both positional isomerism and metamerism (3) Metamerism (4) Functional group isomerism

Q36.An organic compound 'A' C4H8on treatment with KMnO4 / H+ yields compound 'B' C3H6O. Compound 'A' also yields compound 'B' an ozonolysis. Compound 'A' is : (1) 2-Methylpropene (2) 1-Methylcyclopropane (3) But-2-ene (4) Cyclobutane

Q36.Find A, B and C in the following reactions: NH3 + A + CO2 →(NH4)2 CO3 (NH4)2 CO3 + H2O + B →NH4 HCO3 NH4 HCO3 + NaCl →NH4 Cl + C (1) A −H2O; B −CO2; C −NaHCO3 (2) A −H2O; B −O2; C −Na2 CO3 (3) A −H2O; B −O2; C −NaHCO3 (4) A −O2; B −CO2; C −Na2 CO3

Q36.Choose the correct name for compound given below : (1) (2E)-2-Bromo-hex-4-yn-2-ene (2) (4E)-5-Bromo-hex-2-en-4-yne (3) (4E)-5-Bromo-hex-4-en-2-yne (4) (2E)-2-Bromohex-2-en-4-yne JEE Main 2021 (31 Aug Shift 1) JEE Main Previous Year Paper

Q36.Arrange the following conformational isomers of n-butane in order of their increasing potential energy: (1) I < III < IV < II (2) I < IV < III < II (3) II < IV < III < I (4) II < III < IV < I

Q36. Correct statement about the given chemical reaction is (1) Reaction is possible and compound (A) will be (2) −¨NH2 group is ortho and para directive, so major product. product (B) is not possible. (3) Reaction is possible and compound (B) will be (4) The reaction will form sulphonated product the major product. instead of nitration.

Q36.The correct pair(s) of the ambident nucleophiles is (are): (A) AgCN / KCN (B) RCOOAg / RCOOK (C) AgNO2 / KNO2 (D) AgI / KI (1) (B) and (C) only (2) (A) only (3) (A) and (C) only (4) (B) only

Q36.Which of the following compounds does not exhibit resonance ? (1) CH3 CH2 OCH = CH2 (2) (3) CH3 CH2 CH2 CONH2 (4) CH3 CH2 CH = CHCH2 NH2

Q36.In stratosphere most of the ozone formation is assisted by : (1) γ -rays (2) cosmic rays (3) visible radiations (4) ultraviolet radiation

Q37.In chromatography technique, the purification of a compound is independent of: (1) Mobility or flow of solvent system (2) Solubility of the compound (3) Length of the column or TLC Plate (4) Physical state of the pure compound

Q37.Metallic sodium does not react normally with: (1) gaseous ammonia (2) But- 2 -yne (3) Ethyne (4) tert-butyl alcohol

Q37.Match List I with List II : List-I List-II Properties Elements (a) Li (i) Poor water solubility of I− salt (b) Na (ii) Most abundant element in cell fluid (c) K (iii) Bicarbonate salt used in fire extinguisher (d) Cs (iv) Carbonate salt decomposes easily on heating Choose the correct answer from the options given below: (1) (a) −(iv), (b) −(iii), (c) −(ii), (d) −(i) (2) (a) −(i), (b) −(iii), (c) −(ii), (d) −(iv) (3) (a) −(iv), (b) −(ii), (c) −(iii), (d) −(i) (4) (a) −(i), (b) −(ii), (c) −(iii), (d) −(iv)

Q37.Match List - I with List - II: List-I (Property) List-II (Example) (a) Diamagnetism (i) MnO (b) Ferrimagnetism (ii) O2 (c) Paramagnetism (iii) NaCl (d) Antiferromagnetism (iv) Fe3 O4 Choose the most appropriate answer from the options given below: (1) (a) −(iv), (b) −(ii), (c) −(i), (d) −(iii) (2) (a) −(ii), (b) −(i), (c) −(iii), (d) −(iv) (3) (a) −(i), (b) −(iii), (c) −(iv), (d) −(ii) (4) (a) −(iii), (b) −(iv), (c) −(ii), (d) −(i)