Practice Questions

Q43.Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula? (1) Pyrophosphorous acid (2) Hypophosphoric acid (3) Phosphoric acid (4) Pyrophosphoric acid

Q43.Which of the following chemical reactions represents Hall-Heroult Process? (1) Cr2 O3 + 2Al →Al2 O3 + 2 Cr (2) 2 Al2 O3 + 3C →4Al + 3 CO2 (3) FeO + CO →Fe + CO2 (4) 2[Au (CN)2]−(aq) + Zn(s) →2 Au(s) + [Zn(CN4)]2−

Q44. PCl5 is well known but NCl5 is not.Because, (1) N - does not have vacant d-orbital (2) P - does not have 2d orbitals (3) Back bonding in NCl5 is not possible (4) N atom is more electronegative so does not forms 5 bonds

Q44.White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of (1) AgNH34Cl2 (2) AgCl2NH32 (3) AgNH32Cl (4) AgNH3ClCl

Q44.The structure of A in the given reaction is ​ JEE Main 2022 (27 Jul Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q44.The dark purple colour of KMnO4 disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is (1) 5 (2) 1 (3) 7 (4) 2

Q45.The total number of Mn = O bonds in Mn2 O7 is (1) 4 (2) 5 (3) 6 (4) 3

Q46.Match List-I with List-II. List-I List-II A I Gatterman Koch reaction B II Etard reaction C III Stephen reaction JEE Main 2022 (27 Jul Shift 2) JEE Main Previous Year Paper D IV Rosenmund reaction Choose the correct answer from the options given below (1) A −IV, B −III, C −II, D −I (2) A −I, B −II, C −III, D −IV (3) A −II, B −III, C −IV, D −I (4) A −III, B −II, C −I, D −IV

Q46.Which of the following has least tendency to liberate H2 from mineral acids? (1) Cu (2) Mn (3) Ni (4) Zn

Q47.Which is true about Buna- N ? (1) It is a linear polymer of 1, 3-butadiene. (2) It is obtained by copolymerization of 1, 3 - butadiene and styrene. (3) It is obtained by copolymerization of 1, 3 - (4) The suffix N in Buna- N stands for its natural butadiene and acrylonitrile. occurrence.

Q47.Which of the following is an example of polyester? (1) Butadiene-styrene copolymer (2) Melamine polymer (3) Neoprene (4) Poly- β -hydroxybutyrate-co- β -hydroxyvalerate

Q47.Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Dacron is an example of polyester polymer. Reason R: Dacron is made up of ethylene glycol and terephthalic acid monomers. In the light of the above statements, choose the most appropriate answer from the options given below. JEE Main 2022 (29 Jun Shift 2) JEE Main Previous Year Paper (1) Both A and R are correct and R is the (2) Both A and R are correct but R is NOT correct explanation of A the correct explanation of A. (3) A is correct but R is not correct. (4) A is not correct but R is correct.

Q47.During halogen test, sodium fusion extract is boiled with concentrated HNO3 to (1) remove unreacted sodium (2) decompose cyanide or sulphide of sodium (3) extract halogen from organic compound (4) maintain the pH of extract.

Q48.Match List-I with List-II List-I List-II A Nylon 6, 6 I Buckets Low density Non-stick B II polythene utensils High density Bristles of C III polythene brushes D Teflon IV Toys Choose the correct answer from the options given below (1) A −III, B −I, C −IV, D −II (2) A −III, B −IV, C −I, D −II (3) A −II, B −I, C −IV, D −III (4) A −II, B −IV, C −I, D −III

Q48.Terylene polymer is obtained by condensation of (1) Ethane-1, 2-diol and Benzene-1, 3 dicarboxylic (2) Propane-1, 2-diol and Benzene-1, 4 dicarboxylic acid acid (3) Ethane-1, 2-diol and Benzene-1, 4 dicarboxylic (4) Ethane-1, 2-diol and Benzene-1, 2 dicarboxylic acid acid

Q48.Match List I with List II List-I List-II Polymers Commenrcial names A Phenol-formaldehyde resin I Glyptal B Copolymer of 1, 3 -butadiene and styrene II Novolac C Polyester of glycol and phthalic acid III Buna- s D Polyester of glycol and terephthalic acid IV Dacron Choose the correct answer from the options given below (1) A −II, B −III, C −IV, D −I (2) A −II, B −III, C −I, D −IV (3) A −II, B −I, C −III, D −IV (4) A −III, B −II, C −IV, D −I

Q48.Match List I with List II. List-I List-II Enzyme Conversion of A. Invertase I. Starch into maltose B. Zymase II. Maltose into glucose C. Diastase III. Glucose into ethanol D. Maltase IV. Cane sugar into glucose Choose the most appropriate answer from the options given below (1) A −III, B −IV, C −II, D −I (2) A −III, B −II, C −I, D −IV (3) A −IV, B −III, C −I, D −II (4) A −IV, B −II, C −III, D −I

Q48.Which of the following is not a condensation polymer? (1) Nylon −6, 6 (2) Nylon −6 (3) Dacron (4) Buna −S

Q48.Melamine polymer is formed by the condensation of JEE Main 2022 (25 Jul Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q48.The polymer, which can be stretched and retains its original status on releasing the force is (1) Nylon- 6, 6 (2) Buna- N (3) Terylene (4) Bakelite

Q48.The Hinsberg reagent is (1) (2) (3) (4)

Q48.The mixture of chloroxylenol and terpineol is an example of : (1) Antiseptic (2) Pesticide (3) Disinfectant (4) narcotic analgesic

Q48.Which of the following is not a broad spectrum antibiotic? (1) Vancomycin (2) Penicillin G (3) Ofloxacin (4) Ampicillin

Q48.Match List-I with List-II List-I List-II (A) Antipyretic (I) Reduces pain (B) Analgesic (II) Reduces stress JEE Main 2022 (27 Jun Shift 2) JEE Main Previous Year Paper (C) Tranquilizer (III) Reduces fever (D) Antacid (IV) Reduces acidity(stomach) Choose the correct answer from the options given below (1) A −III, B −I, C −II, D −IV (2) A −III, B −I, C −IV, D −II (3) A −I, B −IV, C −II, D −III (4) A −I, B −III, C −II, D −IV

Q48.Match List-I with List-II. List-I List-II (Polymer) (Monomer) A Neoprene I Acrylonitrile B Teflon II Chloroprene C Acrilan III Tetrafluoroethene D Natural rubber IV Isoprene Choose the correct answer from the option given below: (1) A −II, B −III, C −I, D −IV (2) A −II, B −I, C −III, D −IV (3) A −II, B −I, C −IV, D −III (4) A −I, B −II, C −III, D −IV