Q.47. Using Bohr's model, calculate the ratio of the magnetic fields generated due to the motion of the electrons in the

Q.29. Two nuclei of mass number 3 combine with another nucleus of mass number 4 to yield a nucleus of mass number 10. If

Q.30. A solid sphere of mass M and radius R is divided into two unequal parts. The smaller part having mass M/8 is conve

Q.31. The two projectiles are projected with the same initial velocities at the 15° and 30° with respect to the horizont

Q.32. The graph shows variation of stopping potential with the frequency of the incident radiation for three photosens

Q.33. A slit of width a is illuminated by light of wavelength . The linear separation between and minima in the diffra

Q.34. A string A of length 0.314 m of Young's modulus is connected to another string B of length and Young's modulus bo

Q.35. One gas of mole of molecules at temperature , volume , and pressure , and another gas of mole of molecules at te

Q.51. The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g)

Q.52. The first and second ionization constants of a weak dibasic acid are and respectively. 0.1 mol of was dissolve

Q.53. is isostructural with : Choose the correct answer from the options given below:

Q.56. At , 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the st

Q.57. Consider the reaction , for which the rate constant at is . Which of the following statements are true? A. When c

Q.58. The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :