19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?
The correct order of the strength of H-bonds is:
o-nitrophenol can be easily steam distilled whereas p-nitrophenol cannot be. This is because of :
Which of the following hydrogen bonds is the strongest?
What happens to the London forces, if the number of electrons increases?
An ether is more volatile than alcohol having the same molecular formula. This is due to
The order number of the boiling points of the given compounds is
The boiling points at atmospheric pressure of HF, H2S, NH3 can be arranged in the following order:
Electron deficient molecule is (RPMT 2007)
Least ionized salt is (RPMT 2007)
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…
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