Engineering Questions — Chemistry — JEE Main
145 solved questions with detailed explanations
Q.65. Given below are two statements : Statement-I : Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of CHMgBr with water. Statement
Q.75. For a reaction A P at T K, the half life (t) is plotted as a function of initial concentration [A] of A as given below : [Figure: Graph showing half-life (t) on y-axis and initial concentration
Q.70. Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?
Q.63. IUPAC name of the some alkenes are given below : Find out the correct stability order. A. 2-Methylbut-2-ene B. cis-But-2-ene C. 2,3-Dimethylbut-2-ene D. Prop-1-ene Choose the correct answer from
Q.62. Match List-I with List-II. [Figure: Table matching purification techniques with their uses]
Q.58. Match List-I with List-II. List-I (Electronic configuration of neutral atom (where n = 2)) A. B. C. D. List-II (1st Ionization Energy (kJ mol⁻¹)) I. 2080 II. 899 III. 800 IV. 1402 Choose the
Q.67. Given below are two statements : Statement-I : Heating benzamide with bromine in an ethanolic solution of sodium hydroxide will give benzylamine. Statement-II : Nitration of aniline with at 288
Q.51. Match List-I with List-II. List-I Mass of substance A. 1.8 mg water B. 9.8 mg sulphuric acid C. 1.8 mg carbon D. 5.85 mg salt (NaCl) List-II Number of atoms I. 2 × 10⁻⁴ × N_A II. 1.5 × 10⁻⁴ × N_
Q.56. When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was x% of vapor pressure of pure solvent. What is x% ?
Q.53. Bromine trifluoride autoionizes to form BrF and BrF. The shapes of the cation and anion are respectively _______ and _______.