In ion central metal ion has d-electrons equal to

On heating NaCl + K₂Cr₂O₇ + H₂SO₄ conc., the gas that comes out is

Which of the following pairs of isomers and types of isomerism are correctly matched
1) [Co (NH₃)₅(NO₂)] Cl₂ and [Co (NH₃)₅(ONO)] Cl₂ linkage
2) [Cu (NH₃)₄] [PtCl₄] and [Pt (NH₃)₄] [CuCl₄] ------ Coordination
3) [Pt (NH₃)₄Cl₂] Br₂ and [Pt (NH₃)₄Br₂] Cl₂. Ionization

Energy levels A, B, C of a certain atom corresponds to increasing values of energy i.e. E_A < E_B < E_C. If , and are the wavelengths of radiations corresponding to the transitions C to B, B to A and C to A respectively, which of the following statement is correct.

The ionization constant of in water is 5.6 ×´ 10^-10 at 25^oC. The rate constant for the reaction of and OH^- to form NH₃ and H₂O at 25^oC is 3.4 × 10¹⁰ L mol^-1 s^-1. The rate constant for proton transfer from water to NH₃ is

For the curve y² = (x + a)³ the square of the sub tangent varies as

For such questions, we should know the concept of subnormal and subtangent.

The length of the subtangent at any point on y = f(x) is 3/8 and the length of the subnormal is 24 then the ordinate of the point is

For such questions, we should know the formula to find subtangent and subnormal.

The length of the portion of the tangent at any point on the curve x^2/3 + y^2/3 = a^2/3 intercepted between the axis is