Engineering Questions — Chemistry
170 solved questions with detailed explanations
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.72. Consider the isomers of hydrocarbon with molecular formula C₈H₁₀. These isomers do not decolourise KMnO₄ solution. These isomers are subjected to chlorination with chlorine in presence of light
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 _______.
Q.65. Complete the following reaction sequence and give the name of major product 'P'. (Major product)
Q.71. The first and second ionization constants of H₂X are and respectively. The concentration of X²⁻ in 0.1 M H₂X solution is M. (Nearest Integer)
Q.54. The pairs among A = [SO, CO], B = [O, F], C = [CN, CO], D = [NH, HO] and E = [MnO, CrO] that do not have similar Lewis dot structure are :
Q.71. 5.33 g of CrCl₃·6H₂O, which is a 1 : 3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride ions in the eluted solution, on treatment with AgNO₃, results in
Q.56. The solubility product constants of AgCrO and AgBr are 32x and 4y respectively at 298 K. The value of can be expressed as :
Q.58. is the time required for the 100% completion of the reaction while is the time required for 50% of the reaction to be completed. Which of the following option correctly represents the relation
Q.73. 4.7 g of phenol is heated with Zn to give product X. If this reaction goes to 60% completion then the number of moles of compound X formed will be ______ 10 (Nearest Integer) (Given molar mass
Q.64. Given below are two statements : Statement (I) : Benzyl chloride reacts faster in S1 mechanism than ethyl chloride. Statement (II) : Ethyl carbocation intermediate is less stabilized by hypercon
Q.56. Match the LIST-I with LIST-II List-I Reaction A. Williamson Synthesis B. Friedel Craft Reaction C. Bromination of vinyl benzene D. Chlorination of toluene in light List-II Mechanism I. Electroph
Q.68. Arrange the following compounds according to increasing order of boiling points. n-CHOH (A), n-CHNH (B), n-CH (C) and CHNHCH (D).
Q.56. Given at 298 K: The in Volt at 298 K is given by :
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. II. III. IV. Choose the co
Q.65. Given below are four compounds: (a) n-propyl chloride (b) iso-propyl chloride (c) sec-butyl chloride (d) neo-pentyl chloride Percentage of carbon in the one which exhibits optical isomerism is:
Q.67. For a closed circuit Daniell cell, which of the following plots is the accurate one at a given temperature? [Figure: Four graphs of E°cell vs time]
Q.52. The species having identical radii according to the Bohr's theory are : A. H (first orbit) B. He (first orbit) C. He (second orbit) D. Li (first orbit) E. Be (Second orbit) Choose the correct an