Practice Questions

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)

Q38.The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature is (1) -COOH > - CONH2 > - COCl > - CHO (2) -SO3H > - COCl > - CONH2 > - CN (3) (4) COOH > - - COOR > - CONH2 > - COCl JEE Main 2022 (26 Jul Shift 2) JEE Main Previous Year Paper

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

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.In the given reaction sequence, the major product ' C' is : HNO3 Br2 alcoholic −−C8H10 → A → B → C H2 SO4 Δ KOH JEE Main 2022 (24 Jun Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q38.Among the following marked proton of which compound shows lowest pKa value? (1) (2) (3) (4)

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

Q38.When borax is heated with CoO on a platinum loop, blue coloured bead formed is largely due to (1) B2O3 (2) CoBO22 (3) CoB4O7 (4) CoB4O5OH4

Q38.Given below are two statements: Statement I : The non bio-degradable fly ash and slag from steel industry can be used by cement industry. Statement II : The fuel obtained from plastic waste is lead free. In the light of the above statements, choose the most appropriate answer from the options given below JEE Main 2022 (27 Jul Shift 2) JEE Main Previous Year Paper (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.Major product of the following reaction is JEE Main 2022 (25 Jul Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q38.Given below are two Statements : Statement I : Classical smog occurs in cool humid climate. It is a reducing mixture of smoke, fog and sulphur dioxide. Statement II : Photochemical smog has components, ozone, nitric oxide, acrolein, formaldehyde, PAN etc. 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 incorrect but Statement II is (4) Statement I is correct but Statement II is correct. incorrect.

Q38.The ( ∂T∂E )P of different types of half cells are as follows : A B C D 1 × 10−4 2 × 10−4 0. 1 × 10−4 0. 2 × 10−4 (Where E is the electromotive force). Which of the above half cells would be preferred to be used as reference electrode (1) A (2) B (3) C (4) D

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.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.Which among the following pairs has only herbicides? (1) Aldrin and Dieldrin (2) Sodium chlorate and Aldrin (3) Sodium arsinate and Dieldrin (4) Sodium chlorate and sodium arsenite. Q39. 100 mL of 5%(w/v) solution of NaCl in water was prepared in 250 mL beaker. Albumin from the egg was poured into NaCl solution and stirred well. This resulted in a/ an (1) Lyophilic sol (2) Lyophobic sol (3) Emulsion (4) Precipitate

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.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.

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

Q39.The eutrophication of water body results in (1) Increase in biodiversity (2) Loss in biodiversity (3) Break down of organic matter (4) decrease in BOD.

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.Which of the following is not an example of benzenoid compound? (1) (2) (3) (4)

Q39.Arrange the following in increasing order of reactivity towards nitration A. p-xylene B. bromobenzene C. mesitylene D. nitrobenzene E. benzene Choose the correct answer from the options given below (1) C < D < E < A < B (2) D < B < E < A < C (3) D < C < E < A < B (4) C < D < E < B < A

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.Solute A associates in water. When 0 . 7 g of solute A is dissolved in 42 . 0 g of water, it depresses the freezing point by 0 . 2 °C. The percentage association of solute A in water, is [Given: Molar mass of A = 93 g mol-1. Molal depression constant of water is 1 . 86 K kg mol-1] (1) 50% (2) 60% (3) 70% (4) 80%