Practice Questions

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

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 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 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.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.Given below are two statements : Statement I : C2H5 OH and AgCN both can generate nucleophile. Statement II : KCN and AgCN both will generate nitrile nucleophile with all reaction conditions. Choose the most appropriate option : (1) Statement I is true but statement II is false (2) Both statement I and statement II are true (3) Statement I is false but statement II is true (4) Both statement I and statement II are false

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. 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.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.Assertion A : Enol form of acetone [CH3 COCH3] exists in < 0. 1% quantity. However, the enol form of acetyl acetone [CH3 COCH2 OCCH3] exists in approximately 15% quantity. Reason R : enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone. Choose the correct statement: (1) A is false but R is true (2) Both A and R are true and R is the correct explanation of A (3) Both A and R are true but R is not the correct (4) A is true but R is false explanation of A

Q37.Nitrogen can be estimated by Kjeldahl's method for which of the following compound? (1) (2) (3) (4)

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)

Q37. consider the above reaction, and choose the correct statement: (1) The reaction is not possible in acidic medium (2) Both compounds A and B are formed equally (3) Compound A will be the major product (4) Compound B will be the major product JEE Main 2021 (27 Jul Shift 2) JEE Main Previous Year Paper

Q37.Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is: JEE Main 2021 (26 Feb Shift 1) JEE Main Previous Year Paper (1) PbO (2) Pb3 O4 (3) PbO2 (4) PbSO4

Q37.Identify correct A, B and C in the reaction sequence given below : (1) (2) (3) (4)

Q37. The correct order of stability of given carbocation is: (1) A > C > B > D (2) D > B > C > A (3) D > B > A > C (4) C > A > D > B

Q37. For above chemical reactions, identify the correct statement from the following: (1) Both compound ′A′ and compound ′B′ are (2) Both compound ′A′ and compound ′B′ are diols dicarboxylic acids (3) Compound ′A′ is diol and compound ′B′ is (4) Compound ′A′ is dicarboxylic acid and dicarboxylic acid compound ′B′ is diol

Q37.The major product of the following reaction is : (1) (2) (3) (4)

Q37.In the following reaction, the reason why meta-nitro product also formed is: (1) Formation of anilinium ion (2) -NH2 group is highly meta-directive (3) -NO2 substitution always takes place at meta- (4) low temperature position

Q37.The satements that are TRUE: (A) Methane leads to both global warming and photochemical smog (B) Methane is generated from paddy fields (C) Methane is a stronger global warming gas than CO2 (D) Methane is a part of reducing smog Choose the most appropriate answer from the options given below: (1) (A), (B), (C) only (2) (A) and (B) only (3) (B), (C), (D) only (4) (A), (B), (D) only

Q37.Among the following compounds I −IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO3 (iii) AgNO3? (1) III (2) II (3) I (4) IV

Q37.Which of the following molecules does not show stereo isomerism ? JEE Main 2021 (22 Jul Shift 1) JEE Main Previous Year Paper (1) 3, 4 -Dimethylhex- 3 -ene (2) 3 -Methylhex- 1 -ene (3) 3 -Ethylhex- 3 -ene (4) 4 -Methylhex- 1 -ene

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)