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

The equation of the tangent to the curve x² + 2y = 8 which is the perpendicular to x – 2y + 1 = 0 is

For such questions, we should know the formula to find the tangent and slope of lines and curves.

In an isosceles triangle the ends of the base are (2a, 0) and (0, a) and one side is parallel to x – axis. The third vertex is

If x + 2y + 3 = 0, x + 2y – 7 = 0 and 2x – y – 4 = 0 form the sides of square, the equation of the fourth side is

For such questions, we should know properties of square. We should know the formula to find distance between two parallel lines.

The number of real values of k for which the lines x – 2y + 3 = 0, kx + 3y + 1 = 0 and 4x – ky + 2 = 0 are concurrent is

For such questions, we should know properties of concurrent lines.

The distance of the line 2x – 3y = 4 from the point (1, 1) in the direction of the line x + y = 1 is

The mid points of the sides of a triangle are (5, 0), (5, 12) and (0, 12). The orthocentre of this triangle is