Q.1.Energy required for the electron excitation in Li++ from the - TopicsExpress



          

Q.1.Energy required for the electron excitation in Li++ from the first to the thrid Bohr orbit is : (1) 12.1 eV (2) 36.3 eV (3) 108.8 eV (4) 122.4 eV Q.2.A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. the work done by the force of gravity during the time the particle goes up is (1) 0.5 J (2) −0.5 J (3) −1.25 J (4) 1.25 J Q.3.In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a (1) circle (2) helix (3) straight line (4) ellipse Q.4.Consider the following statements: (a) Mode can be computed from histogram (b) Median is not independent of change of scale (c) Variance is independent of change of origin and scale. Which of these is/are correct? (1) only (a) (2) only (b) (3) only (a) and (b) (4) (a), (b) and (c) Q.5.The bond energy (in kcal /mol ) of a C – C single bond is approximately A) 1 B)10 C) 100 D) 1000
Posted on: Tue, 15 Oct 2013 07:14:35 +0000

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