Engineering Questions
460 solved questions with detailed explanations
Q.74. For reaction A → P, rate constant k = 1.5 s⁻¹ at 27°C. If activation energy for the above reaction is 60 kJ mol⁻¹, then the temperature (in °C) at which rate constant, k = 4.5 s⁻¹ is _________
Q.30. A thin biconvex lens is prepared from the glass (μ = 1.5) both curved surfaces of which have equal radii of 20 cm each. Left side surface of the lens is silvered from outside to make it reflecti
Q.32. A body of mass m is taken from the surface of earth to a height equal to twice the radius of earth (R). The increase in potential energy will be ________. (g is acceleration due to gravity at th
Q.71. Number of paramagnetic complexes among the following is [MnBr₄]²⁻, [NiCl₄]²⁻, [Ni(CN)₄]²⁻, [Ni(CO)₄], [CoF₆]³⁻, [Fe(CN)₆]⁴⁻, [Mn(CN)₆]³⁻, [Ti(CN)₆]³⁻, [Cu(H₂O)₆]²⁺, [Co(C₂O₄)₃]³⁻
Q.39. Given below are two statements: one is labelled as Assertion (A): and the other is labelled as Reason (R). Assertion (A): The electromagnetic wave exerts pressure on the surface on which they ar
Q.57. Given below are two statements : R = 8.314 J K⁻¹ mol⁻¹ and 1 cal = 4.2 J Statement I: When Ea = 12.6 kcal/mol, the room temperature rate constant is doubled by a 10°C increase in temperature (29
Q.43. An inductor of inductance 10 mH having resistance of 100 \Omega is connected to battery of E.M.F. 1.0 V through a switch as shown in the figure below. After switch is closed, the ratio of instan
Q.12. is equal to :
Q.52. Which of the following statement(s) is/are true ? (A) If two orbitals have the same value of (n + l), the orbital with lower value of n will have lower energy. (B) Energies of the orbitals in th
Q.31. Two identical bodies, projected with the same speed at two different angles cover the same horizontal range R. If the time of flight of these bodies are 5 s and 10 s, respectively, then the valu
Q.51. Consider the following spectral lines for atomic hydrogen: A. First line of Paschen series B. Second line of Balmer series C. Third line of Paschen series D. Fourth line of Bracket series The co
Q.3. Let be a complex number such that and . Then is equal to :
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.20. Let be the base of natural logarithm and let and be two bijective functions such that is strictly decreasing and is strictly increasing. If , then the area of the region is :
Q.28. The rain drop of mass 1 g, starts with zero velocity from a height of 1 km. It hits the ground with a speed of 5 m/s. The work done by the unknown resistive force is ________ J. (take )
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