Practice Questions

Q37.The correct order of nucleophilicity is (1) F−> OH− (2) H2 ¨O > OH− (3) ROH > RO− (4) NH−2 > NH3

Q37.Given below are two statements: one is labelled as Assertion and the other is labelled as Reason. JEE Main 2022 (25 Jun Shift 2) JEE Main Previous Year Paper Assertion: A mixture contains benzoic acid and napthalene. The pure benzoic acid can be separated out by the use of benzene. Reason: Benzoic acid is soluble in hot water. In the light of the above statements, choose the most appropriate answer from the options given below. (1) Both Assertion and Reason are true and Reason is (2) Both Assertion and Reason are true but Reason is the correct explanation of Assertion. not the correct explanation of Assertion. (3) Assertion is true but Reason is false. (4) Assertion is false but Reason is true.

Q37.Arrange the following carbocations in decreasing order of stability. (1) A > C > B (2) B > A > C (3) C > B > A (4) C > A > B

Q38.In 3 d series, the metal having the highest M2+/M standard electrode potential is (1) Cr (2) Fe (3) Cu (4) Zn

Q38.Given below are two statements. Statement I: The presence of weaker π -bonds make alkenes less stable than alkanes Statement II: The strength of the double bond is greater than that of carbon-carbon single bond. In the light of the above statements, choose the correct answer from the options : given below. (1) Both Statement I and Statement II are correct. (2) Both Statement I and Statement II are incorrect. (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect. correct.

Q38.Which of the following compounds is not aromatic? (1) (2) (3) (4)

Q38.Major product of the following reaction is JEE Main 2022 (25 Jul Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q38.Match List-I with Match List-II List-I List-II (Metal) (Application) (A) Cs (I) High temperature thermometer (B) Ga (II) Water repellent sprays (C) B (III) Photoelectric cells (D) Si (V) Bullet proof vest Choose the most appropriate answer from the options given below (1) (A) −(III), (B) −(I), (C) −(IV), (D) −(II) (2) (A) −(II), (B) −(III), (C) −(IV), (D) −(I) (3) (A) −(IV), (B) −(III), (C) −(II), (D) −(I) (4) (A) −(I), (B) −(IV), (C) −(II), (D) −(II)

Q38.The correct IUPAC name of the following compound is (1) 4 -methyl- 2 -nitro- 5 -oxohept- 3 -enal (2) 4 -methyl- 5 -oxo- 2 -nitrohept- 3 -enal (3) 4 -methyl- 6 -nitro- 3 -oxohept- 4 -enal (4) 6 -formyl- 4 -methyl- 2 -nitrohex- 3 -enal

Q38.The geometry around boron in the product 'B' formed from the following reaction is 450 K BF3 + NaH ⟶ A + NaF A + NMe3 →B (1) trigonal planar (2) tetrahedral (3) pyramidal (4) square planar

Q38.Given below are two statements: one is labelled as Assertion and the other is labelled as Reason. Assertion: Polluted water may have a value of BOD of the order of 17ppm. Reason: BOD is a measure of oxygen required to oxidise both the biodegradable and non-biodegradable organic material in water. In the light of the above statements, choose the most appropriate answer from the options given below. (1) Both Assertion and Reason are true and Reason is (2) Both Assertion and Reason are true but Reason is the correct explanation of Assertion. NOT the correct explanation of Assertion. (3) Assertion is true but Reason is false. (4) Assertion is false but Reason is true.

Q38.Given are two statements one is labelled as Assertion and other is labelled as Reason. Assertion: Magnesium can reduce Al2 O3 at a temperature below 1350 °C, while above 1350 °C aluminium can reduce MgO. Reason: The melting and boiling points of magnesium are lower than those of aluminium. In light of the above statements, choose most appropriate answer from the options given below (1) Both Assertion and Reason are correct, and (2) Both Assertion and Reason are correct, but Reason is correct explanation of Assertion. Reason is NOT the correct explanation of Assertion. (3) Assertion is correct Reason is not correct. (4) Assertion is not correct, Reason is correct.

Q38.The product formed in the following reaction. is: JEE Main 2022 (25 Jun Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q39.Which of the following carbocations is most stable: (1) (2) (3) (4)

Q39.Choose the correct option for the following reactions. (1) 'A' and 'B' are both Markovnikov addition (2) 'A' is Markovnikov product and 'B' is products. antiMarkovnikov product. (3) 'A' and 'B' are both anti-Markovnikov products. (4) 'B' is Markovnikov and 'A' is anti- Markovnikov product.

Q39.Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product? (1) (2) (3) (4)

Q39.Given below are two statements : one is labelled as Assertion and the other is labelled as Reason. Assertion: At 10 °C, the density of a 5 M solution of KCl [atomic masses of K & Cl are 39 & 35. 5 g mol−1 respectively], is ' x' gml−1 . The solution is cooled to −21 °C. The molality of the solution will remain unchanged. Reason: The molality of a solution does not change with temperature as mass remains unaffected with temperature. In the light of the above statements, choose the correct answer from the options given below. (1) Assertion is true but Reason is false. (2) Assertion is false but Reason is true. (3) Both Assertion and Reason are true and Reason is (4) Both Assertion and Reason are true but Reason is the correct explanation of Assertion. not the correct explanation of Assertion.

Q39.Given below are two statements: Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing. Statement II : For stabilisation of an emulsion, excess of electrolyte is added. 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) Both Statement I and Statement II are incorrect. (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect. correct.

Q39.Match List I with List II. List-I List-II A Sulphate I Pesticide B Fluoride II Bending of bones C Nicotine III Laxative effect D Sodium arsinite IV Herbicide Choose the correct answer from the options given below (1) A −II, B −III, C −IV, D −I (2) A −III, B −II, C −I, D −IV (3) A −IV, B −III, C −II, D −I (4) A −III, B −II, C −IV, D −I

Q39.Two isomers ' A' and ' B' with molecular formula C4H8 give different products on oxidation with KMnO4 in acidic medium. Isomer ' A' on reaction with KMnO4 /H+ results in effervescence of a gas and gives ketone. The compound ' A' is (1) But- 1-ene. (2) cis-But- 2-ene. (3) trans-But- 2-ene. (4) 2-methyl propene. JEE Main 2022 (29 Jun Shift 1) JEE Main Previous Year Paper

Q39.Given below are two statements : Statement I : According to the Ellingham diagram, any metal oxide with higher ΔG° is more stable than the one with lower ΔG° . Statement II : The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram. 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) Both Statement I and Statement II are incorrect. (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect. correct.

Q39.Statement I: Leaching of gold with cyanide ion in absence of air / O2 leads to cyano complex of Au(III). JEE Main 2022 (27 Jun Shift 2) JEE Main Previous Year Paper Statement II: Zinc is oxidized during the displacement reaction carried out for gold extraction. In the light of the above statements, choose the correct answer from the options given below. (1) Both Statement 1 and statement 2 are correct (2) Both Statement 1 and statement 2 are incorrect (3) Statement 1 is correct but statement 2 is incorrect (4) Statement 1 is incorrect but statement 2 is correct

Q39.The correct stability order of the following diazonium salt is (1) (A) > (B) > (C) > (D) (2) (A) > (C) > (D) > (B) (3) (C) > (A) > (D) > (B) (4) (C) > (D) > (B) > (A) Q40. ˙Cl + CH4 →A + B A and B in the above atmospheric reaction step are (1) C2H6 and Cl2 (2) ˙C HCl2 and H2 (3) CH3˙ and HCl (4) C2H6 and HCl

Q39.Given below are two statements: Statement I: For KI, molar conductivity increases steeply with dilution. Statement II: For carbonic acid, molar conductivity increases slowly with dilution. In the light of the above statements, choose the correct answer from the options given below (1) Statement I is correct and Statement II is (2) Both Statement I and Statement II are false incorrect (3) Statement I is true but Statement II is false (4) Statement I is false but Statement II is true

Q39.Correct statement about photo-chemical smog is (1) It occurs in humid climate. (2) It is a mixture of smoke, fog and SO2 . (3) It is reducing smog. (4) It results from reaction of unsaturated hydrocarbons.