Chemical Bonding and Molecular Structures

Which of the following molecules is not an exception to octet rule?

• BF3

• PF5

• CO2

• IF7

Which of the following molecule is not polar?

• NH3

• NF3

• BF3

• CHCl3

PCl5 molecule has the follwoing geometry

• Trigonal bipyramidal

• Octahedral

• Square Planar

• Pyramidal

In which of the following species is the underlined carbon having Sp3 hybridisation?

• CH3COOH

• CH3CH2OH

• CH3COCH3

• CH2=CHCH3

Which among the following is diamagnetic?

• N2

• O2

• N2^2-

• O2^-

In which of the following substances will hydrogen bond be strongest?

• HC

• H₂O

• HI

• H₂S

Which of the following angle corresponds to sp2 hybridisation?

• 90°

• 120°

• 180°

• 109°

In which of the following molecules, σ2p_z molecular orbital is filled before π2p_x and π2p_y molecular orbitals?

• O₂

• C2

• N₂

• B2

Which of the following statement is wrong for hyrogen bond?

• Hydrogen bond is weaker than covalent bond

• Hydrogen bond is stronger than vander waals forces of attraction

• Intermolecular hydrogen bonding is weaker han intramolecular hydrogen bond.

• none of the above

What are isoelectronic species?

• same number of electrons

• same number of neutrons

• same number of protons

• All the above