Practice Questions

Q35. List - I List - II (Compound/Species) (Shape/Geometry) A. SF4 I. Tetrahedral Match List I with List II Choose the correct B. BrF3 II. Pyramidal C. BrO−3 III. See saw D. NH+4 +KS IV. Bent T-Shape answer from the options given below: (1) A-II, B-III, C-I, D-IV (2) A-II, B-IV, C-III, D-I (3) A-III, B-IV, C-II, D-I (4) A-III, B-II, C-IV, D-I

Q35.Given below are two statements : Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities. Statement (II) : Blood is naturally occurring buffer solution whose pH is maintained by H2CO3/HCO−3 Θ concentrations. In the light of the above statements, choose the correct answer from the options given below : (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

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.Given below are two statements : Statement (I) : Aqueous solution of ammonium carbonate is basic. Statement (II) : Acidic/basic nature of salt solution of a salt of weak acid and weak base depends on Ka and Kb value of acid and the base forming it. In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are correct (2) Statement I is correct but Statement II is incorrect (3) Both Statement I and Statement II are incorrect (4) Statement I is incorrect but Statement II is correct

Q36.The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is: CH3CH2COOH, CH3COOH, CH3CH2CH2COOH, HCOOH JEE Main 2024 (08 Apr Shift 2) JEE Main Previous Year Paper (1) CH3CH2CH2COOH > CH3CH2COOH > CH3COOH > HCOOH (2) CH3COOH > CH3CH2COOH > CH3CH2CH2COOH > HCOOH (3) HCOOH > CH3COOH > CH3CH2COOH > CH3CH2CH2COOH (4) HCOOH > CH3CH2CH2COOH > CH3CH2COOH > CH3COOH

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 correct statements from the following are : (A) The decreasing order of atomic radii of group 13 elements is Tl > In > Ga > Al > B . (B) Down the group 13 electronegativity decreases from top to bottom. (C) Al dissolves in dil. HCl and liberates H2 but conc. HNO3 renders Al passive by forming a protective oxide layer JEE Main 2024 (05 Apr Shift 2) JEE Main Previous Year Paper on the surface. (D) All elements of group 13 exhibits highly stable +1 oxidation state. (E) Hybridisation of Al in [Al(H2O)6]3+ ion is sp3 d2 . Choose the correct answer from the options given below : (1) (A), (C) and (E) only (2) (A) and (C) only (3) (C) and (E) only (4) (A), (B), (C) and (E) only

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

Q36.Given below are two statements : Statement I: S8 solid undergoes disproportionation reaction under alkaline conditions to form S2 − and S2O32 − Statement II: ClO4− can undergo disproportionation reaction under acidic condition. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is correct but statement II is (2) Statement I is incorrect but statement II is correct incorrect. (3) Both statement I and statement II are incorrect (4) Both statement I and statement II are correct JEE Main 2024 (31 Jan Shift 2) JEE Main Previous Year Paper

Q36.Which of the following nitrogen containing compound does not give Lassaigne's test? JEE Main 2024 (04 Apr Shift 1) JEE Main Previous Year Paper (1) Urea (2) Phenyl hydrazine (3) Glycene (4) Hydrazine

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.Given below are two statement one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion (A): CH2 = CH −CH2 −Cl is an example of allyl halide Reason (R): Allyl halides are the compounds in which the halogen atom is attached to sp2 hybridised carbon atom. JEE Main 2024 (30 Jan Shift 1) JEE Main Previous Year Paper In the light of the two above statements, choose the most appropriate answer from the options given below: (1) (A) is true but (R) is false (2) Both (A) and (R) are true but (R) is not the correct explanation of A (3) (A) is false but (R) is true (4) Both (A) and (R) are true and (R) is the correct explanation of (A)

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 statement among the following, for a "chromatography" purification method is : (1) Organic compounds run faster than solvent in the (2) Rf is an integral value. thin layer chromatographic plate. (3) Rf of a polar compound is smaller than that of a (4) Non-polar compounds are retained at top and non-polar compound. polar compounds come down in column chromatography.

Q36.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements. Reason (R) : Solid Boron has very strong crystalline lattice. In the light of the above statements, choose the most appropriate answer from the options given below ; (1) Both (A) and (R) are correct but (R) Is not the (2) Both (A) and (R) are correct and (R) is the correct explanation of (A) correct explanation of (A) (3) (A) is true but (R) is false (4) (A) is false but (R) is true

Q36.Which of the following reactions are disproportionation reactions? 1 Cu+ →Cu2 + + Cu 2 3MnO42 - + 4H+ →2MnO4- + MnO2 + 2H2O 3 2KMnO4 →K2MnO4 + MnO2 + O2 4 2MnO4- + 3Mn2 + + 2H2O →5MnO2 + 4H+ Choose the correct answer from the options given below: (1) 1, 2 (2) 2, 3, 4 (3) 1, 2, 4 (4) 1, 4

Q36. Correct order of basic strength of Pyrrole , Pyridine , and Piperidine is: (1) Pyrrole > Piperidine > Pyridine (2) Pyrrole > Pyridine > Piperidine (3) Pyridine > Piperidine > Pyrrole (4) Piperidine > Pyridine > Pyrrole

Q36.Match List I with List II Choose the correct answer from the options given below: (1) A-I, B-II, C-III, D-IV (2) A-IV, B-I, C-II, D-III (3) A-III, B-IV, C-I, D-II (4) A-II, B-I, C-IV, D-III

Q36.Given below are two statements : Statement I : The electronegativity of group 14 elements from Si to Pb gradually decreases. Statement II : Group 14 contains non-metallic, metallic, as well as metalloid elements. In the light of the above statements, choose the most appropriate from the options given below : (1) Statement I is false but Statement II is true (2) Statement I is true but Statement II is false (3) Both Statement I and Statement II are true (4) Both Statement I and Statement II are false

Q36. List - I List - II (Molecule/Species) (Property/Shape) A. SO2Cl2 I. Paramagnetic Match List I with List II Choose the correct answer B. NO II. Diamagnetic C. NO−2 III. Tetrahedral D. I−3 IV. Linear from the options given below: (1) A-II, B-III, C-I, D-IV (2) A-III, B-I, C-II, D-IV (3) A-IV, B-I, C-III, D-II (4) A-III, B-IV, C-II, D-I

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.The equilibrium constant for the reaction SO3(g) ⇌SO2( g) + 12 O2( g) is Kc = 4.9 × 10−2 . The value of Kc for the reaction given below is 2SO2( g) + O2( g) ⇌2SO3( g) is : (1) 4.9 (2) 49 (3) 41.6 (4) 416

Q36.The technique used for purification of steam volatile water immiscible substance is: (1) Fractional distillation (2) Fractional distillation under reduced pressure (3) Distillation (4) Steam distillation

Q37.Given below are two statements: Statement I: IUPAC name of HO - CH2 - ( CH2 ) - CH2 - COCH3 is 7-hydroxyheptan-2-one. 3 Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for the above compound. In the light of the above statements, Choose the most appropriate answer from the options given below: (1) Statement I is correct but Statement II is (2) Both Statement I and Statement II are incorrect. incorrect. (3) Both Statement I and Statement II are correct. (4) Statement I is incorrect but Statement II is correct. JEE Main 2024 (31 Jan Shift 1) JEE Main Previous Year Paper

Q37.Given below are two statements: Statement (I) : SiO2 and GeO2 are acidic while SnO and PbO are amphoteric in nature. Statement (II) : Allotropic forms of carbon are due to property of catenation and pπ - dπ bond formation. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both Statement I and Statement II are false (2) Both Statement I and Statement II are true (3) Statement I is true but Statement II is false (4) Statement I is true but Statement II is true