Practice Questions

Q35.Match List - I with List - II. List-I (Salt) List-II (Flame colour wavelength) (a) LiCl (i) 455. 5 nm (b) NaCl (ii) 670. 8 nm (c) RbCl (iii) 780. 0 nm (d) CsCl (iv) 589. 2 nm Choose the correct answer from the options given below: (1) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i) (2) (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) (3) (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii) (4) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

Q35.The major product formed in the following reaction is: (1) (2) (3) (4)

Q35.The major product (A) formed in the reaction given below is : (1) (2) (3) (4)

Q35.Identify products A and B . (1) (2) (3) (4)

Q35.The correct order of conductivity of ions in water is: (1) Na+ > K+ > Rb+ > Cs+ (2) Cs+ > Rb+ > K+ > Na+ (3) K+ > Na+ > Cs+ > Rb+ (4) Rb+ > Na+ > K+ > Li+

Q35.Identify the process in which change in the oxidation state is five : (1) Cr2 O2−7 →2 Cr3+ (2) MnO−4 →Mn2+ (3) CrO2−4 →Cr3+ (4) C2O2−4 →2 CO2

Q35.The correct statements about H2O2 are : (A) used in the treatment of effluents. (B) used as both oxidising and reducing agents. (C) the two hydroxyl groups lie in the same plane. (D) miscible with water. Choose the correct answer from the options given below : (1) (A), (B), (C) and (D) (2) (A), (B) and (D) only (3) (B), (C) and (D) only (4) (A), (C) and (D) only

Q35.The correct order of acid character of the following compounds is : (1) IV > III > II > I (2) II > III > IV > I (3) III > II > I > IV (4) I > II > III > IV

Q35.The stereoisomers that are formed by electrophilic addition of bromine to trans - but - 2 - ene is/are : (1) 2 identical mesomers (2) 2 enantiomers (3) 2 enantiomers and 2 mesomers (4) 1 racemic and 2 enantiomers

Q35. Cu2+ salt reacts with potassium iodide to give (1) Cu2 I2 (2) Cu2 I3 (3) Cul (4) Cu (I3)2

Q35.Calgon is used for water treatment. Which of the following statement is NOT true about Calgon? (1) It is polymeric compound and is water soluble. (2) Calgon contains the 2nd most abundant element by weight in the Earth's crust. (3) It is also known as Graham's salt. (4) It doesnot remove Ca2+ ion by precipitation.

Q35.A s-block element (M) reacts with oxygen to form an oxide of the formula MO2 . The oxide is pale yellow in colour and paramagnetic. The element (M) is: (1) Mg (2) Na (3) Ca (4) K

Q35.One of the by-products formed during the recovery of NH3 from Solvay process is: (1) Ca(OH)2 (2) NaHCO3 (3) CaCl2 (4) NH4 Cl

Q35.In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected? (1) BI3 (2) BBr3 (3) BCl3 (4) BF3

Q35.Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point) ? (1) Simple distillation (2) Steam distillation (3) Fractional distillation (4) Reduced pressure distillation

Q35.Reagent, 1−naphthylamine and sulphanilic acid in acetic acid is used for the detection of (1) N2O (2) NO−3 (3) NO (4) NO−2

Q35.Which one of the following set of elements can be detected using sodium fusion extract? (1) Sulfur, Nitrogen, Phosphorus, Halogens (2) Phosphorus, Oxygen, Nitrogen, Halogens (3) Nitrogen, Phosphorus, Carbon, Sulfur (4) Halogens, Nitrogen, Oxygen, Sulfur

Q35.Statements about heavy water are given below. A. Heavy water is used in exchange reactions for the study of reaction mechanisms. B. Heavy water is prepared by exhaustive electrolysis of water. C. Heavy water has higher boiling point than ordinary water. D. Viscosity of H2O is greater than D2O. Choose the most appropriate answer from the options given below: (1) A and C only (2) A, B and C only (3) A and B only (4) A and D only

Q35.Which of the following equation depicts the oxidizing nature of H2O2 ? (1) 2I−+ H2O2 + 2H+ →I2 + 2H2O (2) I2 + H2O2 + 2 OH−→2I−+ 2H2O + O2 (3) Cl2 + H2O2 →2HCl + O2 (4) KIO4 + H2O2 →KIO3 + H2O + O2

Q35.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Barium carbonate is insoluble in water and is highly stable. Reason (R): The thermal stability of the carbonates increases with increasing cationic size. Choose the most appropriate answer from the options given below : JEE Main 2021 (26 Aug Shift 2) JEE Main Previous Year Paper (1) (A) is true but (R) is false. (2) Both (A) and (R) are true. (3) (A) is false but (R) is true. (4) Both (A) and (R) are false.

Q35.Among the following, the aromatic compounds are : JEE Main 2021 (16 Mar Shift 1) JEE Main Previous Year Paper Choose the correct answer from the following options : (1) (A) and (B) only (2) (B) and (C) only (3) (B), (C) and (D) only (4) (A), (B) and (C) only

Q36.Staggered and eclipsed conformers of ethane are: (1) Polymers (2) Rotamers (3) Enantiomers (4) Mirror images JEE Main 2021 (27 Jul Shift 1) JEE Main Previous Year Paper

Q36.Choose the correct name for compound given below : (1) (2E)-2-Bromo-hex-4-yn-2-ene (2) (4E)-5-Bromo-hex-2-en-4-yne (3) (4E)-5-Bromo-hex-4-en-2-yne (4) (2E)-2-Bromohex-2-en-4-yne JEE Main 2021 (31 Aug Shift 1) JEE Main Previous Year Paper

Q36.Which of the following is an aromatic compound? JEE Main 2021 (17 Mar Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q36.Arrange the following conformational isomers of n-butane in order of their increasing potential energy: (1) I < III < IV < II (2) I < IV < III < II (3) II < IV < III < I (4) II < III < IV < I