Practice Questions

Q31.The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency ' A ' ×1012 hertz and that has a radiant intensity in that direction of ′ 1B′ watt per steradian. 'A' and 'B' are respectively (1) 540 and 683 (2) 450 and 683 (3) 450 and 1 (4) 540 and 1 683 683

Q31.The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is: (1) 5, 0, 0, + 12 (2) 5, 0, 1, + 12 (3) 5, 1, 0, + 12 (4) 5, 1, 1, + 12

Q31.According to the wave-particle duality of matter by de-Broglie, which of the following graph plot presents most appropriate relationship between wavelength of electron λ and momentum of electron p ? JEE Main 2024 (01 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q31.The number of moles of methane required to produce 11 gCO2( g) after complete combustion is : (Given molar mass of methane in gmol−1 : 16) (1) 0.35 (2) 0.5 (3) 0.75 (4) 0.25

Q31.The number of radial node/s for 3p orbital is: (1) 1 (2) 4 (3) 2 (4) 3

Q31.Combustion of glucose (C6H12O6) produces CO2 and water. The amount of oxygen (in g) required for the complete combustion of 900 g of glucose is : [Molar mass of glucose in gmol−1 = 180 ] (1) 480 (2) 800 (3) 960 (4) 32

Q31.Given below are two statements: Statement - I: Along the period, the chemical reactivity of the element gradually increases from group 1 to group 18 . Statement - II: The nature of oxides formed by group 1 element is basic while that of group 17 elements is acidic. In the the light above statements, choose the most appropriate from the questions given below: (1) Both statement I and Statement II are true. (2) Statement I is true but Statement II is False. (3) Statement I is false but Statement II is true. (4) Both Statement I and Statement II is false.

Q32.The shape of carbocation is : (1) diagonal pyramidal (2) trigonal planar (3) tetrahedral (4) diagonal

Q32.The molecular formula of second homologue in the homologous series of mono carboxylic acids is _________. (1) C3H6O2 (2) C2H4O2 (3) CH2O (4) C2H2O2

Q32.Which of the following electronic configuration would be associated with the highest magnetic moment ? (1) [Ar] 3d7 (2) [Ar] 3d8 (3) [Ar] 3d3 (4) [Ar] 3d6

Q32.The incorrect postulates of the Dalton's atomic theory are : (A) Atoms of different elements differ in mass. (B) Matter consists of divisible atoms. (C) Compounds are formed when atoms of different element combine in a fixed ratio. (D) All the atoms of given element have different properties including mass. (E) Chemical reactions involve reorganisation of atoms. Choose the correct answer from the options given below : (1) (C), (D), (E) only (2) (B), (D) only (3) (A), (B), (D) only (4) (B), (D), (E) only

Q32.In case of isoelectronic species the size of F–, Ne and Na+ is affected by: (1) Principal quantum number n (2) None of the factors because their size is the same (3) Electron-electron interaction in the outer orbitals (4) Nuclear charge z

Q32.The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are (1) n = 4, l = 2, m = −1, s = + 1 (2) n = 4, l = 0, m = 0, s = + 1 2 2 1 1 (3) n = 3, l = 0, m = −1, s = + (4) n = 2, l = 0, m = 0, s = + 2 2

Q32.The ratio KP for the reaction : CO(g) + 12 O2( g) ⇌CO2( g) is : KC (1) 1 (2) (RT)1/2 √RT (3) RT (4) 1

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

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.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. 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. 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.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

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.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

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