19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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…
Among the following the maximum covalent character is shown by the compound
The lattice energy of KF, KCl, KBr and KI follow the order:
I. When a gas phase atom in its ground state gains an electron, the enthalpy change is called electron gain enthalpy. II. The electron gain process is always exothermic. III. The ionization enthalpy process is always …
The amount of energy released when one mole of ionic solid is formed by packing of gaseous ion is called :
The melting point of RbBr is 682ºC while that of NaF is 988ºC. The principal reason for this fact is :
In which of the following species the bonds are non- directional?
Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4
Lattice energy of an ionic compound depends upon
An ionic compound A+B– is most likely to be formed when:
Which combination will give the strongest ionic bond?
The most stable compound is :
Consider the following statements ; I. In ionic solids, the sum of the electron gain enthalpy and the ionisation enthalpy may be positive but still the crystal structure gets stabilised due to the energy released in t…
Lattice energy of an ionic compound depends upon
Lattice energy of a solid increases if.