19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Bond length if defined as the equilibrium distance between the nuclei of two bonded atoms in a molecule. Bond length can be calculated in the case of
Which of the following cannot be used to measure bond lengths?
The amount of energy required to break one mole of bonds of a particular type between two atoms in a gaseous state is called
If the bond enthalpy of O2, N2 and H2 are 498 kJ mol-1 , 946 kJ mol-1 and 435.8 kJ mol-1 respectively. Choose the correct order of decreasing bond strength.
The bond order in H2, O2 and N2 is respectively
Which of the following is correct : (a) Bond order stability bond length bond enthalpy (b) Stability bond order bond length bond enthalpy
Match the bond type given in Column I with the bond length in column II and choose the correct option from the codes given below Column I Column II A. O-H 1. 154 pm B. C-C 2. 133 pm C. C-O 3. 96 pm D. C=C 4. 143 pm Co…
In the given resonating structures, which one is called resonance hybrid?
The O─O bond length in ozone molecule is:
Whenever a single Lewis structure cannot describe a molecule accurately, a number of structures with almost similar energy, position of nuclei, bonding and non-bonding pairs of electrons are taken as the canonical str…
The structure which represents the molecule’s structure more accurately is called
Resonating structure are represented through which type of arrows?
Deviation of O─O bond length in ozone molecule from the normal bond length seems as
Resonance structures can be written for:
Which of the following is correct representation of canonical forms resonance?
Which of the following molecules represents resonance
The product of the magnitude of the charge and the distance between the centres of positive and negative charge is called.
Dipole moment is usually designated by a Greek letter ‘μ ‘ µ = Q × r Here Q and r represents
Dipole moment is usually expressed in Debye units
The dipole moment of HF molecule may be represented as (a) (b) (c) (d) Ans. (b) Sol. This arrow symbolizes the direction of the shift of electron density in the molecule.
The net dipole moment of H2O molecule is
Which of the following molecule has dipole moment zero?
The decreasing order of dipole moments of the molecules HF, H2O, BeF2, NF3 is
NH3 and NF3, both the molecules have pyramidal shape with a lone pair of electrons on nitrogen atom. Why does the dipole moment of NH3 is greater than that of NF3? Choose the correct option.
Polarity in a molecule and hence the dipole moment depends primarily on electronegatively of the constituent atoms and shape of a molecule. Which of the following has the highest dipole moment?