19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a
Kossel and Lewis approach was based on the
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…
Ionic bonds will be formed more easily between elements with comparatively.
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.
Which is not correctly matched?
The shapes of XeF4, Θ XeF and SnCl2 are:
Which of the following pairs of species have identical shapes? (a) NO and NO
Match the following Column and choose the correct option from the codes given below. Column I Column II A. BeCl2 1. Linear B. BF3 2. Trigonal planar C. CO2 Codes : A B C (a) (b) (c) (d) Ans. (c) Sol. BeCl2, CO2 linear…
Shape of XeF4 is
Among the following, the molecule with highest dipole moment is :
The compound MX is tetrahedral. The number of XMX angles in the compound is:
Which of the following molecules does not have a dipole moment?
The highest dipole moment is of:
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?
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.
The decreasing order of dipole moments of the molecules HF, H2O, BeF2, NF3 is
Which of the following molecule has dipole moment zero?
The net dipole moment of H2O molecule is
Which amongst the following is incorrect statement? (NEET 2022)
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.