19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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.
Ionic compounds in the crystalline state consist of orderly three dimensional arrangements of …X… and …Y… held together by coulombic interaction energies. In the above statement X and Y refer to
Ionic bonds will be formed more easily between elements with comparatively.
Consider the following statement, I. The formation of the positive and negative ions from the neutral atoms by loosing and gaining electrons respectively. II. The arrangement or position of the positive and negative i…
Which of the following is/are correct? I. Generally the lowest energy structure is the one with the smallest formal charges on the atoms. II. The formal charge is a factor based on a pure covalent view of bonding in w…