Which species has bond angles of 90°?

A. AlCl₄^-

B. $\text{I}$Cl₄^-

C. NH₄⁺

D. SiCl₄

What is the hybridization of the numbered atoms in ethanoic acid?

Which combination describes the PH₄⁺ ion?

What is the hybridization state and electron domain geometry around the circled C, N and O atoms?

What is the hybridization of nitrogen and chlorine in NCl₃?

Which combination correctly describes the geometry of ${{\mathrm{BrF}}_4}^{-}$?

Which contain delocalised electrons?

I.   C₆H₅OH
II.  CH₃COO⁻
III. CO₃²⁻

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

Which overlap of atomic orbitals leads to the formation of only a sigma (σ) bond?

       I.     s − p

       II.     p − p

       III.     s − s

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

In which compound are all carbon atoms sp³ hybridized?

A.  C₂H₂

B.  C₂H₂Cl₂

C.  C₂Cl₄

D.  C₂Cl₆

Which species have resonance structures?

I.     Ozone, O₃
II.     Carbon dioxide, CO₂
III.     Benzene, C₆H₆

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

What is the number of sigma (σ) and pi (π) bonds in the molecule (NC)₂C=C(CN)₂?

Which combination describes the bonding and structure in benzoic acid, C₆H₅COOH?

In which series are all carbon atoms sp² hybridized?

A.  C₂H₂     H₂CO        HCOOH

B.  C₂H₄     H₂CO        HCOOH

C.  C₂H₂     CO           HCN

D.  C₂H₆     CH₃OH     CH₃OCH₃

Which does not show resonance?

A.     PO₄^3–

B.     C₆H₆

C.     C₆H₁₂

D.     O₃

Which statement is correct?

A.     Sigma bonds are formed only by the combination of s atomic orbitals.

B.     Pi bonds can be formed in the absence of sigma bonds.

C.     Pi bonds are formed parallel to the axis between atoms.

D.     Pi bonds are formed only by the combination of hybrid orbitals.

Which can be represented with only one Lewis structure?

A.     CH₂O

B.     C₆H₆

C.     O₃

D.     NO₃⁻

How many sigma (σ) and pi (π) bonds are present in this molecule?

Which species has a square planar molecular geometry?

A. SF₄

B. XeF₄

C. CF₄

D. PF₄⁺

Which molecule has an expanded octet?

A.     CO

B.     CO₂

C.     SF₂

D.     SF₄

Which molecules contain two pi ($\mathrm{\pi }$) bonds?

I.   HCN
II.  H₂CO₃
III. H₂C₂O₄

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

Which molecules have at least one sp² hybridized atom?

        I.     CH₃COOH

        II.     CH₃COCH₃

        III.     CH₂CHCH₂OH

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

Which atom does not obey the octet rule?

A.  C in CO₂

B.  F in BF₃

C.  O in H₂O

D.  S in SF₆

How many sigma (σ) and pi (π) bonds are present in hydrogen cyanide, HCN?

Which species has delocalized electrons?

A. OH⁻

B. H₂CO

C. CO₂

D. CO₃²⁻

Which atom is sp² hybridized?

A.  C in H₂CO

B.  C in CO₂

C.  N in CH₃NH₂

D.  O in H₂O

What is the hybridization of the circled carbon, oxygen and nitrogen atoms?

What is the electron domain geometry of Si in SiO₂?

A.  bent

B.  linear

C.  square planar

D.  tetrahedral

How many carbon atoms are sp³, sp² and sp hybridized in the molecule?

What is the hybridization of carbon and oxygen in methanol?

What is the molecular geometry of SF₄?

A.  Tetrahedral

B.  Trigonal bipyramidal

C.  See-saw

D.  Square planar

What is the formal charge of the oxygen atom in H₃O⁺?

A.  −2

B.  −1

C.  0

D.  +1