Zadanie 10
Which molecules are polar? I. CHCl3 II. CH2F2 III. CF4 A. I and II only B. I and III only C. II and III only D. I, II and III
Molecular polarity and dipole moments
Decide whether a molecule or ion is polar by combining its bond dipoles with its geometry, explaining why symmetrical molecules such as CO2 and CCl4 are non-polar while H2O and NH3 have a net dipole moment.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 10 Otwórz w wyszukiwarce z filtrami
Zadanie 7
Which molecule is polar? A. BF3 B. NF3 C. CCl4 D. C2H4
Zadanie 7a
(i) State the electron configuration of a nitrogen atom. (ii) Draw the Lewis formula of ammonia. (iii) Deduce the electron domain geometry and the molecular geometry of the ammonia molecule. (iv) Explain why the ammonia molecule is polar.
Zadanie 7
Which molecule has the largest net dipole moment? A. SiF4 B. CS2 C. H2S D. H2O
Zadanie 4b
(i) Draw the Lewis (electron dot) structure of carbonyl chloride. (ii) Mark the bond polarities on your Lewis structure using the symbols δ+ and δ−. (iii) Explain the shape of the carbonyl chloride molecule and whether it is polar. (iv) Outline…
- Materiał graficzny
Zadanie 10
Which row correctly states the types of intermolecular force present between molecules of ethane, methylamine and fluoromethane? A. Ethane: London (dispersion) forces only; methylamine: London forces, dipole-dipole forces and hydrogen bonding; fluoromethane:…
Zadanie 11
Which molecule is the most polar? A. CO2 B. CCl4 C. H2S D. H2O
Zadanie 12
What is the main attraction between molecules in liquid carbon tetrachloride, CCl4? A. Hydrogen bonding B. Ionic attraction C. Dipole–dipole forces D. London (dispersion) forces
Zadanie 10
Which molecule is polar? A. PCl3 B. BF3 C. CCl4 D. CO2
Zadanie 11
Sulfur dioxide, SO2, has sulfur as the central atom. The electronegativity of sulfur is 2.6 and that of oxygen is 3.4. Which row describes the polarity of the bonds and of the molecule correctly? A. S=O bonds: O is δ − and S is δ +;…
- Materiał graficzny