Question
Which dot-and-cross diagram is correct for \(Al_2Cl_6\)?
Answer/Explanation
Ans: B
Question
In which structure are three atoms bonded together in a straight line?
A poly(ethene), \(-(-CH_2CH_2-)_n-\)
B propane, \(C_3H_8\)
C silicon tetrachloride, \(SiCl_4\)
D sulfur hexafluoride, \(SF_6\)
Answer/Explanation
Ans: D
Question
Which molecules contain at least one unpaired electron?
1 NO
2 NO2
3 NH3
Answer/Explanation
Answer B
Question
The eight species that follow all have covalent bonds.
In which pair do the species have different shapes from each other?
A BeCl2 and CO2
B CH4 and NH4+
C NH3 and BF3
D SCl2 and H2O
Answer/Explanation
Answer:
C