19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The net dipole moment of H2O molecule is
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.
Dipole moment is usually expressed in Debye units
Dipole moment is usually designated by a Greek letter ‘μ ‘ µ = Q × r Here Q and r represents
The product of the magnitude of the charge and the distance between the centres of positive and negative charge is called.
Which of the following molecules represents resonance
Which of the following is correct representation of canonical forms resonance?
Resonance structures can be written for:
Deviation of O─O bond length in ozone molecule from the normal bond length seems as
Resonating structure are represented through which type of arrows?
The structure which represents the molecule’s structure more accurately is called
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 O─O bond length in ozone molecule is:
In the given resonating structures, which one is called resonance hybrid?
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…
Which of the following is correct : (a) Bond order stability bond length bond enthalpy (b) Stability bond order bond length bond enthalpy
The bond order in H2, O2 and N2 is respectively
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 amount of energy required to break one mole of bonds of a particular type between two atoms in a gaseous state is called
Which of the following cannot be used to measure bond lengths?
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
The lowest O – O bond length in the following molecule is :
The compound with the highest degree of covalency is :
In an ionic compound A+X– the degree of covalent bonding is greatest when :
Consider the following statements : I. The smaller the size of cation and larger the size of anion, the greater the covalent character of an ionic bond. II. The greater the charge on the cation the greater will be the…