Which one of the following has the highest dipole moment?
AsH3
SbH3
PH3
NH3
Which of the following does not have a tetrahedral structure?
BH-4
BH3
NH+4
H2O
In which of the following molecules, the central atom said to adopt sp2-hybridisation?
BeF2
BF3
C2H2
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
N2and O2, are converted into monoanions N-2 and O-2 respectively. Which of the following statements is wrong?
In N2, the N-N bond weakens
In O-2, O-O bond length increase
In O-2, bond order decreases
N-2, becomes diamagnetic
Which statement is not correct?
A sigma bond is weaker than a π- bond
A sigma bond is stronger than a π -bond
A double bond is stronger than a single bond
A double bond is shorter than a single bond
The correct order of N-O bond lengths in NO, NO-2, NO-3 and N2O4 is
NO-2O4 > NO-2 > NO-3>NO
NO> NO-3>N2O4 >NO-2
NO-3 > NO-2 > N2O4>NO
NO > N2O4 > NO-2 > NO-3
Which one of the following is the correct order of interactions?
Covalent < hydrogen bonding < van der
Van der Waals' < hydrogen bonding < dipole-dipole < covalent
Van der Waal's < dipole-dipole < hydrogen bonding < covalent
Dipole-dipole < van der Waal's < hydrogen bonding < covalent
The high density of water compared to ice is due to
Hydrogen bonding interactions
Dipole-dipole interactions
Dipole-induced dipole interactions
Induced dipole-induced dipole interactions
Which structure is linear?
SO2
CO2
CO2-3
SO2-4
