Engineering Questions

Q.21. From a month of 31 days, 3 different dates are selected at random. If the probability that these dates are in an increasing A.P. is equal to , where and , then is equal to ________.

Q.75. If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction will be ________ minutes. (Given: log 2 = 0.3010)

Q.70. On heating a mixture of common salt and K₂Cr₂O₇ in equal amount along with concentrated H₂SO₄ in a test tube, a gas is evolved. Formula of the gas evolved and oxidation state of the central meta

Q.50. Two masses of 3.4 kg and 2.5 kg are accelerated from an initial speed of 5 m/s and 12 m/s, respectively. The distances traversed by the masses in the second are 104 m and 129 m, respectively. T

Q.41. An insulated wire is wound so that it forms a flat coil with N = 200 turns. The radius of the innermost turn is , and of the outermost turn . If 20 mA current flow in it then the magnetic moment

Q.48. A 5 mg particle carrying a charge of 5π × 10⁻⁹ C is moving with velocity of (3\hat{i}+2\hat{k})×10²m/s in a region having magnetic field B=0.1\hat{k} Wb/m². It moves a distance of a meter along

Q.30. A wedge Y with mass of 10 kg and all frictionless surfaces and the inclined surface making 37° with horizontal. A block X with mass 2 kg is placed at the highest point of the wedge as shown in [

Q.71. Consider the following species BrF₅, XeF₆, BF₃, ICl₄⁰, XeF₄, SF₄, NH₃, ClF₃, XeF₂, ICl₂⁰ Number of species having spd hybridized central atom is

Q.20. The integral is equal to :

Q.31. A solid sphere of radius 4 cm and mass 5 kg is rotating (rotation axis is passing through the centre of the sphere) with an angular velocity of 1200 rpm. It is brought to rest in 10 s by applyin