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.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 :

Q.52. The species having identical radii according to the Bohr's theory are : A. H (first orbit) B. He (first orbit) C.

Q.53. Which of the following pictorial diagram most correctly represents the ( - antibonding) molecular orbital between

Q.65. The following structures are [Figure: Two organic molecules, RS1 and RS2, are shown. RS1 is 1-bromo-1-chloro-2,2-d

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

Q.15. The square of the distance of the point from the line along the line is equal to:

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.3. Let be a complex number such that and . Then is equal to :

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