If an organic compound has C = 40%, H = 13.3% and N = 46.67%, then the empirical formula of this compound is

• CH₄N

• C₂H₈N₂

• CH₃N

• None of these

The values for all the quantum numbers for 15^th electron of chlorine are

• n = 3; l = 1; m = 0; s = -$\frac{1}{2}$

• n = 4; l = 2; m = 0; s = + $\frac{1}{2}$

• n = 3; l = 1; m = +1; s = +$\frac{1}{2}$

• n = 2; l = 0; m = 0; s = +$\frac{1}{2}$

Outermost configuration for Z = 25, is

• 4s², 3d⁵

• 5s², 4d⁵

• 4s², 3d³

• 4s², 3d¹

The type of hybridisation present in each carbon of benzene is

• sp³

• sp²

• sp

• None of these

Which of the following is incorrect for radial distribution curve?

• n = 2; l = 0; Node = 1

• n = 3; l = 0; Node = 2

• n = 2; l = 1; Node = 0

• n = 3; l = 2; Node = 1

If H⁺ concentration of fruit juice is 3.3 × 10^-2, then its pH will be

• 4.8 basic

• 4.8 neutral

• 4.8 acidic

• 1.6 acidic

If the value of bond order is zero, then

• molecule will be stable

• molecule will be unstable

• molecule will be in ionic state

• None of the above

Which is responsible for the diagonal relation of lithium with magnesium?

• Less ionic radii

• High polarising power

• Approximately equal electronegativity and affinity

• All of the above

Bond order of N₂ molecule is

• 3

• 2

• 1

• 0

Which of the following is a proper match?

• A - i; B - ii; C - iv; D - iii

• A - iii; B - ii; C - iv; D - i

• A - i; B - iii; C - ii; D - iv

• A - ii; B - iv; C - i; D - iii