The dielectric constant of H2O is 80. The electrostatic force of attraction between Na+ and CI- will be.
Reduced to 1/40 in water than in air
Reduced to 1/80 in water than in air
Will be increased to 80 in water than in air
Will remain unchanged
Among the following orbital bonds, the angle is minimum between
sp3 bonds
Px and Py orbitals
H - O - H in water
sp bonds
The boiling point of p-nitrophenol is higher than that of o-nitrophenol because
NO2 group at p-posiiton behave in a different way from that at o-position
Intramolecular hydrogen bonding exists in p-nitro phenol
There is intermolecular hydrogen bonding in p-nitrophenol
p-nitrophenol has a higher molecular weight than o-nitrophenol
When the hybridisaiton state of carbon atom changes from sp3 to sp2 and finally to sp, the angle between the hybridised orbitals
Decreases gradually
Decreases considerably
Is not affected
Increases progressively
The ground state electronic configuration of valence shell electrons in nitrogen molecule (N2) is written as kk, σ 2s2, σ *2s2, σ 2p2x, π2p2y ≈ π2p2z
Bond order in nitrogen molecule is
0
2
1
3
Which of the following statement is not correct?
Double bond is shorter than a single bond
Sigma bond is weaker than a π (pi) bond
Double bond is stronger than a sing bond
Covalent bond is stronger than hydrogen bond
Which of the following does not apply to metallic bond?
Overlapping valence orbitals
Mobile valence electrons
Delocalised electrons
Highly directed bonds
For two ionic solids CaO and KI, identify the wrong statement among the following
Lattice energy of CaO is much larger than that of KI
KI is soluble in benzene
KI has lower melting point
CaO has higher melting point
AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by As atoms for bonding are
dx2-y2,dz2, s,px,py
dxy, s, px, py,pz
s,px,py,pz,dxy
dx2-y2,s,px,py,pz
An sp3- hybrid orbital contains
1/4 s- character
1/2 s- character
1/3 s-character
2/3 s- character
