Sigma and Pi Bonds

Q. The total number of pi-electrons in the following structure is:

1. four
2. eight
3. twelve
4. sixteen

Q. The extent of overlap of bonding orbitals is directly proportional to ________.

1. bond strength
2. bond angle
3. number of electrons shared
4. bond polarity

Q.

How many pi bonds are present in the molecule of ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{C}\equiv \mathrm{CH}$?

1. 2 bonds

2. 3 bonds

3. 8 bonds

4. 9 bonds

Q.

The H-C-H bond angle in ethane is 109° 28.

1. True
2. False

Q. The number of bonding e- pairs in N2 on the basis of molecular orbital theory is? 1. 3 2. 2 3. 5 4. 4 And how??

Q.

difference between sigma and pi bond

Q. The p orbitals are aligned along the x, y and z axes as shown below.

If the orbitals overlap along z - axis, bonds formed by which of the following overlaps (if possible) is easiest to break?

1. $p_x$ $-$ $p_x$
2. $p_y$ $-$ $p_y$
3. $p_z$ $-$ $p_z$
4. $p_x$$-$ $p_z$

Q. Covalent bond is___.

1. A bond formed by sharing of the electrons between the atoms.
2. A bond formed by transfer of the electrons between the atoms.
3. A bond formed by the attraction of the electrons between the atoms.
4. A bond formed by the valence electrons and metal ions.

Q. How is C-C bond length less than C-Cl bond length?

Q. Head-on overlapping of two p-orbitals result in the formation of sigma bond(s).

1. three
2. one
3. two

Q. The percentage of s-character in the orbital forming $P-S$ bonds in $P_4{S}_3$ is:

1. $25\%$
2. $33\%$
3. $75\%$
4. $50\%$

Q. The number of sigma bonds formed between two atoms with four shared electrons are:

1. three
2. two
3. one
4. zero