Practice Questions

Q32.The IUPAC name of following compound is : (1) 2-nitro- 4-hydroxymethyl- 5-amino benzaldehyde (2) 3-amino- 4-hydroxymethyl- 5-nitrogenzaldehyde (3) 5-amino- 4-hydroxymethyl- 2-nitrobenzaldehyde (4) 4-amino- 2-formyl- 5-hydroxymethyl nitrogenzene

Q32.In the following reaction sequence the major products A and B are : JEE Main 2020 (05 Sep Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q32.While titration dilute HCI solution with aqueous NaOH, which of the following will not be required ? (1) Burette and porcelain tile (2) Pipette and distilled water (3) Clamp and phenolphthalein (4) Bunsen burner and measuring cyclinder

Q33.A chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of (A) benzanilide (B) aniline and (C) acetophenone. When the column is eluted with a mixture of solvents, hexane:ethyl acetate (20 : 80) , the sequence of obtained compounds is: (1) (B), (C) and (A) (2) (B), (A) and (C) (3) (C), (A) and (B) (4) (A), (B) and (C)

Q33.The major product obtained from the following reaction is : (1) (2) (3) (4)

Q33.The condition that indicates a polluted environment is: (1) eutrophication (2) 0. 03% of CO2 in the atmosphere (3) BOD value of 5 ppm (4) pH of rain water to be 5.6

Q33.The reaction of H3N3B3Cl3(A) with LiBH4 in tetrahydrofuran gives inorganic benzene (B) . Further, the reaction of (A) with (C) leads to H3N3B3(Me)3 . Compounds (B) and (C) respectively, are: (1) Bogging god MeBr (2) Diborane and MeMgBr (3) Boron nitride and MeBr (4) Borazine and MeMgBr JEE Main 2020 (09 Jan Shift 2) JEE Main Previous Year Paper

Q33.The incorrect statement(s) among (a) – (d) regarding acid rain is (are): a) It can corrode water pipes (b) It can damage structures made up of stone. (c) It cannot cause respiratory ailments in animals (d) It is not harmful for trees (1) (a), (c) and (d) (2) (c) only (3) (a), (b) and (d) (4) (c) and (d)

Q33.Among the following compounds, geometrical isomerism is exhibited by : (1) (2) (3) (4)

Q33.A solution of m− chloroaniline, m− chlorophenol and m− chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A . The left over organic phase was extracted JEE Main 2020 (07 Jan Shift 1) JEE Main Previous Year Paper with dilute NaOH solution to give fraction B . The final organic layer was labelled as fraction C . Fractions A, B and C, contain respectively: (1) m− chlorobenzoic acid, m− chloroaniline and (2) m− chlorobenzoic acid, m− chlorophenol and m− chlorophenol m− chloroaniline (3) m− chlorophenol, m− chlorobenzoic acid and (4) m− chloroaniline, m− chlorobenzoic acid and m− chloroanilinc m− chlorophenol

Q33.The metal mainly used in devising photoelectric cells is : (1) Na (2) Li (3) Rb (4) Cs

Q33.Arrange the following compounds in increasing order of C −OH bond length: methanol, phenol, p - ethoxyphenol (1) methanol < p -ethoxyphenol < phenol (2) phenol < methanol < p -ethoxyphenol (3) phenol < p -ethoxyphenol < methanol (4) methanol < phenol < p -ethoxyphenol

Q33.The IUPAC name of the following compound is: (1) 5-Bromo-3-methylcyclopentanoic acid (2) 4-Bromo-2-methylcyclopentane carboxylic acid (3) 3-Bromo-5-methylcyclopentanoic acid (4) 3-Bromo-5-methylcyclopentanoic carboxylic acid

Q33.Kjeldahl’s method cannot be used to estimate nitrogen for which of the following compounds? JEE Main 2020 (08 Jan Shift 2) JEE Main Previous Year Paper (1) C6H5NH2 (2) CH3CH2 −C ≡N (3) C6H5NO2 (4)

Q33.Which of the following compounds will form the precipitate with aq. AgNO3 solution most readily? JEE Main 2020 (04 Sep Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q33.A crystal is made up of metal ions ′M1′ and ′M2′ and oxide ions. Oxide ions form a ccp lattice structure. The cation ′M1′ occupies 50% of octahedral voids and the cation ′M2′ occupies 12. 5 % of tetrahedral voids of oxide lattice. The oxidation numbers of ′M1′ and ′M2′ are respectively : (1) +2, + 4 (2) +1, + 3 (3) +3, + 1 (4) +4, + 2

Q33.An organic compound ' A ' (C9H10O) when treated with conc. HI undergoes cleavage to yield compound ' B ' and ' C'. ' B' gives yellow precipitate with AgNO3 where as ' C ' tautomerizes to ' D '. ' D ' gives positive iodoform test. ' A' could be: (1) (2) (3) (4)

Q33.Which of the following compounds produces an optically inactive compound on hydrogenation? (1) (2) (3) (4)

Q34.A diatomic molecule X2 has a body-centred cubic (bcc) structure with a cell edge of 300 pm. The density of the molecule is 6. 17 gcm−3. The number of molecules present in 200 g of X2 is : (Avogadro constant (NA) = 6 × 1023 mol−1 ) (1) 40 NA (2) 8 NA (3) 4 NA (4) 2 NA

Q34.The increasing order of basicity for the following intermediates is (from weak to strong) (1) (iii) < (i) < (ii) < (iv) < (v) (2) (v) < (i) < (iv) < (ii) < (iii) (3) (v) < (iii) < (ii) < (iv) < (i) (4) (iii) < (iv) < (ii) < (i) < (v)

Q34.Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non volatile solute are together sealed in a container. Over time: (1) the volume of the solution increases and the (2) the volume of the solution decreases and the volume of the solvent decreases volume of the solvent increases (3) the volume of the solution and the solvent does (4) change and the volume of the solvent decreases not change the volume of the solution does not

Q34.The major products of the following reaction are : JEE Main 2020 (06 Sep Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q34.For the reaction 2A + 3B + 32 C →3P , which statement is correct? (1) dnA dt = 32 dnBdt = 34 dnCdt (2) dnAdt = dnBdt = dnCdt (3) dnA dt = 23 dnBdt = 43 dnCdt (4) dnAdt = 23 dnBdt = 34 dnCdt

Q34.The increasing order of pKb for the following compounds will be : (1) (B) < (C) < (A) (2) (A) < (B) < (C) (3) (C) < (A) < (B) (4) (B) < (A) < (C)

Q34.Which of the following has the shortest C −Cl bond? (1) Cl −CH = CH2 (2) Cl −CH = CH −NO2 (3) Cl −CH = CH −CH3 (4) Cl −CH = CH −OCH3