19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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…
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…
Assertion (A) Formal charges do not indicate real charge separation within the molecule. Reason (R) Formal charges help in the selection of the lowest energy structure from a number of possible Lewis structure for a g…
In the given structure, the formal charge on the oxygen atom of P ─ O bond is
Calculate the formal charge of C in CH4.
The correct order of the strength of H-bonds is:
Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?
What type of intermolecular forces are due to the attraction between temporary dipoles and their induced temporary dipoles?
Which of the following molecule can form a hydrogen bond?