Practice Questions

Q33. List-I List-II (Molecule) (Shape) A. NH3 I. Square pyramid Match List I with List II Choose the correct answer B. BrF5 II. Tetrahedral C. PCl5 III. Trigonal pyramidal D. CH4 IV. Trigonal bipyramidal from the options given below: (1) A-II, B-IV, C-I, D-III (2) A-III, B-I, C-IV, D-II (3) A-IV, B-III, C-I, D-II (4) A-III, B-IV, C-I, D-II JEE Main 2024 (08 Apr Shift 1) JEE Main Previous Year Paper

Q33.For the given reaction, choose the correct expression of KC from the following: Fe3 + aq + SCN- aq ⇌(FeSCN ) 2 + aq (1) 𝐹𝑒𝑆𝐶𝑁2 + (2) 𝐹𝑒3 + 𝑆𝐶𝑁- 𝐾𝐶= + 𝐾𝐶= + 𝐹𝑒3 𝑆𝐶𝑁- 𝐹𝑒𝑆𝐶𝑁2 (3) 𝐹𝑒𝑆𝐶𝑁2 + (4) 𝐹𝑒𝑆𝐶𝑁2 2 𝐾𝐶= + + 𝐾𝐶= + 𝐹𝑒3 2𝑆𝐶𝑁-2 𝐹𝑒3 𝑆𝐶𝑁-

Q33. List - I (Element) List - II (Electronic configuration) A. N I. [Ar]3 d104 s24p5AR Match List I with List II B. S II. [Ne]3 s23p4 Choose C. Br III. [He]2 s22p3 D. Kr IV. [Ar]3 d104 s24p6 the correct answer from the options given below: (1) A-III, B-II, C-I, D-IV (2) A-II, B-I, C-IV, D-III (3) A-I, B-IV, C-III, D-II (4) A-IV, B-III, C-II, D-I JEE Main 2024 (09 Apr Shift 2) JEE Main Previous Year Paper

Q33.When ψA and ψB are the wave functions of atomic orbitals, then σ∗ is represented by : (1) ψA + 2ψB (2) ψA −ψB (3) ψA + ψB (4) ψA −2ψB

Q33.In which one of the following pairs the central atoms exhibit sp2 hybridization ? (1) H2O and NO2 (2) BF3 and NO−2 (3) NH−2 and H2O (4) NH−2 and BF3 JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper

Q33.Bond line formula of HOCH ( CN ) is: 2 (1) (2) (3) (4)

Q33.Which of the following material is not a semiconductor. (1) Silicon (2) Copper oxide (3) Germanium (4) Graphite JEE Main 2024 (06 Apr Shift 1) JEE Main Previous Year Paper

Q33.Which of the following is not correct? (1) ΔG is negative for a spontaneous reaction (2) ΔG is positive for a spontaneous reaction (3) ΔG is zero for a reversible reaction (4) ΔG is positive for a non-spontaneous reaction

Q34. List - I List - II (Hybridization) (Orientation in Space) A. sp3 I. Trigonal bipyramidal Match List I with List II Choose the correct B. dsp2 II. Octahedral C. sp3 d III. Tetrahedral D. sp3 d2 IV. Square planar answer from the options given below: (1) A-IV, B-III, C-I, D-II (2) A-III, B-IV, C-I, D-II (3) A-III, B-I, C-IV, D-II (4) A-II, B-I, C-IV, D-III

Q34.Which of the following is least ionic? (1) BaCl2 (2) AgCl (3) KCl (4) CoCl2 𝐶 Q35.𝐴𝑔⇌𝐵𝑔+ 1 2𝑔.1 The correct relationship between 𝐾𝑃, 𝛼 and equilibrium3 1 pressure 𝑃 is 2 (1) α 2P (2) α 2P KP = 1 KP = 1 2 2 +1 α32 2 +1 α121 −α (3) α 2P 2 (4) α 2P 2 KP = 3 KP = 3 2 + α 2 2 + α 2

Q34.IUPAC name of following compound is (1) 2 – Aminopentanenitrile (2) 2 – Aminobutanenitrile (3) 3 – Aminobutanenitrile (4) 3 – Aminopropanenitrile

Q34. According to IUPAC system, the compound is named as: (1) Cyclohex −1 −en −2 −ol (2) 1 −Hydroxyhex −2 −ene (3) Cyclohex −1 −en −3 −ol (4) Cyclohex −2 −en −1 −ol

Q34.Structure of 4 −Methylpent −2 −enal is: (1) (2) (3) (4)

Q35.The incorrect statement regarding conformations of ethane is: (1) Ethane has infinite number of conformations (2) The dihedral angle in staggered conformation is 60° (3) Eclipsed conformation is the most stable (4) The conformations of ethane are interconvertible conformation. to one-another

Q35.Methods used for purification of organic compounds are based on : (1) nature of compound and presence of impurity. (2) neither on nature of compound nor on the impurity present. (3) nature of compound only. (4) presence of impurity only.

Q35. Match List I with List II : Choose the correct answer from the options given below : (1) (A) - (IV), (B) - (III), (C) - (I), (D) - (II) (2) (A) - (I), (B) - (II), (C) - (IV), (D) - (III) (3) (A) - (III), (B) - (I), (C) - (II), (D) - (IV) (4) (A) - (II), (B) - (IV), (C) - (III), (D) - (I)

Q35. KMnO4 decomposes on heating at 513 K to form O2 along with (1) MnO2 & K2O2 (2) K2 MnO4 & Mn (3) Mn & KO2 (4) K2 MnO4 & MnO2

Q35.Example of vinylic halide is (1) (2) (3) (4)

Q35.Which among the following purification methods is based on the principle of “Solubility” in two different solvents? (1) Column Chromatography (2) Sublimation (3) Distillation (4) Differential Extraction

Q35.A species having carbon with sextet of electrons and can act as electrophile is called (1) carbon free radical (2) carbanion (3) carbocation (4) pentavalent carbon Q36.‘Adsorption’ principle is used for which of the following purification method? (1) Extraction (2) Chromatography (3) Distillation (4) Sublimation

Q36.The incorrect statement regarding ethyne is (1) The C −C bonds in ethyne is shorter than that in (2) Both carbons are sp hybridised ethene (3) Ethyne is linear (4) The corbon - carbon bonds in ethyne is weaker than that in ethene

Q36.The correct stability order of carbocations is (1) + + + (2) + + + + CH33C+ > CH3 - CH2 > CH32 CH > CH3 CH3 > CH32 CH > CH3 - CH2 > CH33 C (3) + + + + (4) $\stackrel{+\quad} CH33 C > CH32 CH > CH3 - CH2 > CH3 {\mathrm{C}\mathrm{H}_3}>\mathrm{CH}_3- \stackrel{+ \quad}{\mathrm{C} \mathrm{H}_2}>\mathrm{CH}_3-\underset{| \atop \stackrel{ \atop }{\huge \mathrm{CH}_3}} {\stackrel{+ \quad}{\mathrm{C} \mathrm{H}}}>\left(\mathrm{CH}_3\right) \mathrm{C}^{+}$

Q36.Match List - I with List - II. List - I Compound List-II Use (A) Carbon tetrachloride (I) Paint remover (B) Methylene chloride (II) Refrigerators and air conditioners (C) DDT (III) Fire extinguisher (D) Freons (IV) Non Biodegradable insecticide Choose the correct answer from the options given below: (1) (A)-(I), (B), (II), (C)-(III), (D)-(IV) (2) (A)-(III), (B)-(I), (C)-(IV), (D)-( II) (3) (A)-(IV), (B)-(III), (C)-(II), (D)-(I) (4) (A)-( II), (B)-(III), (C)-(I), (D)-(IV)

Q36. X ⇌Y; K1 = 1.0 For the given hypothetical reactions, the equilibrium constants are as follows : Y ⇌Z; K2 = 2.0 The Z ⇌W; K3 = 4.0 equilibrium constant for the reaction X ⇌W is (1) 6.0 (2) 12.0 (3) 7.0 (4) 8.0

Q36.The following reaction occurs in the Blast furnance where iron ore is reduced to iron metal Fe2O3( s) + 3CO(g) ⇌Fe(l) + 3CO2( g) Using the Le-chatelier's principle, predict which one of the following will not disturb the equilibrium. (1) Addition of CO2 (2) Removal of CO2 (3) Addition of Fe2O3 (4) Removal of CO