Which one of the following is not a state function?

• Internal energy

• Work

• Entropy

• Free energy

The number of radial nodes present in 3p orbital is

• 0

• 1

• 2

• 3

The radiation with maximum frequency is

• X-ray

• radio waves

• UV rays

• IR rays

The equation used to represents the electron gain enthalpy is

• X(g) + e^- → X^-(g)

• X(s) + e^- → X^-(g)

• X(g) → X⁺(g) + e^-

• X(s) → X⁺(g) + e^-

An element in +2 oxidation state has 24 electrons. The atomic number of the element and the number of unpaired electrons in it respectively are

• 24 and 4

• 26 and 4

• 24 and 2

• 26 and 5

Number of bonding electron pairs and number of lone pairs of electrons in ClF₃, SF₄, BrF₅ respectively are

• 3, 2, 4, 2, 5, 2

• 3, 1, 4, 1,5, 2

• 3, 1, 4, 2, 5, 1

• 3, 2, 4, 1, 5, 1

What is the bond order of N₂ ?

• 3

• 4

• 2

• 1

Match the following

The correct answer

• A-IV, B-III, C-I, D-II

• A-V, B-III, C-I, D-II

• A-V, B-III, C-II, D-I

• A-IV, B-III, C-II, D-I

The most probable speed of O₂, molecules at T(K) is

• $\sqrt{\frac{\mathrm{RT}}{4\mathrm{\pi }}}$

• $\sqrt{\frac{\mathrm{RT}}{16\mathrm{\pi }}}$

• $\sqrt{\frac{\mathrm{RT}}{16}}$

• $\sqrt{\frac{3\mathrm{RT}}{32}}$

Acccording to significant figure convention the result obtained by adding 12.11, 18.0 and 1.012 is

• 31.12

• 31.1

• 31

• 31.122