Which of the following concerning o and bonds is/are correct? Sigma bonds may on

Question

Which of the following concerning o and bonds is/are correct? Sigma bonds may only be formed from unhybridized orbitals. Pi bonds are formed from unhybridized p orbitals. A pi bond has an electron distribution above and below the bond axis. 1 only 2 only 3 only 1 and 2 2 and 3 Which of the following concerning sigma and pi bonds is/are correct? 1. A sigma bond may be formed from the sideways overlap of two parallel p orbitals. 2. No more than two pi bonds are possible between adjacent carbon atoms. 3. The considerable energy required to rotate pi bonded atoms is the primary reason for geometrical isomerism in some pi bonded molecules. 1 only 2 only 3 only 1 and 2 2 and 3 If four orbitals on one atom overlap four orbitals on a second atom, how many molecular orbitals will form? 4 16 1 8 none of these

Explanation / Answer

answer

28) c

sigma and pi bonds can be formed by both hybrid and unhybrid orbitals

29) e

sigma bond is formed by only head to head overlapping along axix. there can be maximum of three bond between two carbon aton one is sigma and rest two are always pi.

30) d

number of orbital formed after ovelap is equal to total number of orbitals overlapped

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