What two atomic orbitals or hybrid atomic orbitals overlap to form the carbon-ca

Question

What two atomic orbitals or hybrid atomic orbitals overlap to form the carbon-carbon sigma bond in ethyne? sp^3-sp^3 p-p sp^2 - sp^2 s-s sp-sp Which is the correct order of decreasing acidity in the following compounds? A > C > B A > B > C C > B > A C > A > B B > A > C The pi-bonds in ethyne is formed by end-to-end sp-sp overlap side-to-side sp-sp overlap end-to-end s-sp overlap end-to-end p-p overlap side-to-side p-p overlap Keto-enol forms are resonance structures enantiomers disatereomers constitutional isomers In the hydroboration-oxidation reaction of a terminal alkyne, the final product is a(n) alkyne aldehyde ketone enol alcohol Which of the following statements about benzene is correct? All of the carbon atoms are sp^3 hybridized. It has no delocalized electrons. The carbon-carbon bond length is longer than that of ethane. It is a planar molecule. The carbon-hydrogen bonds are not the same length.

Explanation / Answer

(5) (E) sp - sp. In acetylene C undergoes sp hybridisation and sigma bonds are only formed by hybrid orbitals.

(6) (C) ethyne > ethene > ethane

(7) (E) side to side p - p overlap. After sp hybridisation of C, the remaining two p orbitals under goes side ways overlapping to form two pi bonds.

(8) (A) Resonance structures

(9) (B) Aldehyde

(10) (D) it is a planar molecule.

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