TG-2 (Initial)

Choose the correct statement regarding the energy levels of hydrogen atom:

• The energy values depend only on the value of n, the principal quantum number

• The energy values are independent of the value of n, the principal quantum number

• The energy values depend on the values of the three quantum numbers n, l, and ml

• The energy value of the ground state is zero

When r → 0, the value of the wave function for orbitals with l = 1

• Also tends to 0

• Tends to a non-zero value

• tends to a maximum value

• May or may not tend to 0 depending on the principal quantum number

Choose the correct statement regarding the angular wavefunction, γ_(θ,φ),of the hydrogen-like atoms:

• It is related with the principal quantum number (n)

• It is related with the angular momentum quantum number (l)

• It is related with the magnetic quantum number (m_l)

• It is related with both the angular momentum and magnetic quantum number (l and m_l)

Choose the correct statement regarding the angular momentum quantum number:

• takes values from 0 to (n-1)

• takes values from -l to +l

• never takes the value of zero

• takes values from 0 to (n+1)

Choose the correct statement regarding the energy levels in multielectronic atoms:

• Electronic shells are described by the value of the angular momentum quantum number (l)

• Electronic sub-shells are described by the value of the angular momentum quantum number (l)

• Electronic shells are described by the value of the principal quantum number (n)

• Electronic sub-shell 2s has 3 degenerated orbitals

Regarding the ionization potential (I_p) of Na, P and Cl atoms:

• I_p(Na)<I_p(P)<I_p(Cl)

• I_p(Na)>I_p(P)>I_p(Cl)

• I_p(Na)>I_p(P)≈<I_p(Cl)

• I_p(Na)≈<I_p(P)≈<I_p(Cl)

Which of the following molecules has a tetrahedral electronic geometry (Gillespie) and a bent molecular geometry?

• CH₄

• NH₂⁻

• NH₃

• CO₂

Choose the correct electronic-group geometry (Gillespie) for XeF₄

• AX₄E₂

• AX₄

• AX₄E

• AX₅

Identify which of the following correlations is NOT correct:

• sp³ hybridization and tetrahedral electronic-group (Gillespie) geometry

• sp³d² hybridization and electronic-group (Gillespie) symbol AX₄

• Trigonal bipyramidal electronic-group geometry (Gillespie) and symbol AX₃E₂

• Seesaw geometry and sp³d hybridization

Indicate which of the following molecules is polar:

• CCl₄

• H₂O

• CO₂

• C₂H₄