Pick out the isoelectronic structures from the following
I and II
I and III
I and IV
II, III and IV
The example of σ-complex is
Fe(η5-C5H5)2
[Cr(CO)6]
Al2(CH3)6
Zeiss salt
C.
Al2(CH3)6
The example of σ-complex is Al2(CH3)6.
Trimethyl aluminium is a σ-bonded organo-metallic compound in which the metal and carbon atom of ligand are joined together with a σ-bond. It exists at a dimer and two methyl group act as bridges between two aluminium atoms.
The bond present in N2O5 are
only ionic
covalent and coordinate
only covalent
covalent and ionic
Which of the following statements is false?
1. Non-bonding pairs occupy more space than bonding pairs.
2. The bonding orbitals in trigonal bipyramidal molecule are described as sp3d hybrids.
3. SnCl2 has linear shape.
4. PCl and AlCl are isoelectronic.
1
2
3
4
The correct order of increasing C-O bond length of CO, CO2 and CO is
CO < CO2 < CO
CO2 < CO < CO
CO < CO < CO2
CO < CO2 < CO
Covalent compounds have low melting point because
covalent molecules are held by weak van der Waal's force of attraction
covalent bond is less exothermic
covalent bond is weaker than ionic bond
covalent molecules have definite shape