group15_flashcards

Question 1

Which elements belong to Group 15 of the periodic table?

Answer 1

N, P, As, Sb, Bi

Question 2

What is the general electronic configuration of Group 15 elements?

Answer 2

ns² np³

Question 3

Why does nitrogen not form pentahalides?

Answer 3

Because nitrogen lacks d-orbitals.

Question 4

Which Group 15 element has the highest ionization enthalpy?

Answer 4

Nitrogen

Question 5

Order the thermal stability of MH₃ (Group 15 hydrides) from highest to lowest.

Answer 5

NH₃ > PH₃ > AsH₃ > SbH₃ > BiH₃

Question 6

Which nitrogen oxides are neutral?

Answer 6

N₂O and NO

Question 7

What hybridization and geometry does PCl₅ have?

Answer 7

sp³d; trigonal bipyramidal

Question 8

Name the process used to prepare nitric acid industrially.

Answer 8

Ostwald Process

Question 9

Which nitrogen oxide is paramagnetic and dimerizes?

Answer 9

NO₂ → N₂O₄

Question 10

What is the basicity of orthophosphoric acid?

Answer 10

3 (three ionizable OH groups)

Question 11

Which compound evolves PH₃ when reacted with water?

Answer 11

Ca₃P₂ + H₂O → PH₃ + Ca(OH)₂

Question 12

List the acid strength order of E₂O₅ oxides in Group 15.

Answer 12

N₂O₅ > P₂O₅ > As₂O₅ > Sb₂O₅ > Bi₂O₅

Question 13

What complex ions can ammonia form?

Answer 13

[Ag(NH₃)₂]⁺, [Cu(NH₃)₄]²⁺

Question 14

What are the oxidation states shown by Group 15 elements?

Answer 14

-3, +3, +5

Question 15

Which Group 15 hydride has the highest basicity?

Answer 15

NH₃