19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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…
The boiling point of a substance increases with increase in
Metallic bond is.
Which of the following does not represent positive overlap? (a) (b) (c) (d) Ans. (b) Sol. Out of phase overlap occurs in (b) Thus, it shows negative overlap.
The valence bond theory explains the shape, the formation and directional properties of bonds in polyatomic molecules like CH4, NH3 and H2O etc., in terms of
VBT theory is based on the
FAsF bond angle in AsF3Cl2 molecule is:
Which of the following are isoelectronic and isostructural? NO ,CO ,ClO ,SO (a) NO ,CO (b) SO ,NO (c) ClO ,CO (d) CO ,ClO Ans. (a) Sol. Both have 32 electrons and have trigonal planar shape.