Chemistry Question Bank

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.

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?

The highest dipole moment is of:

Which of the following molecules does not have a dipole moment?

Dipole moment is usually designated by a Greek letter ‘μ ‘ µ = Q × r Here Q and r represents

The product of the magnitude of the charge and the distance between the centres of positive and negative charge is called.

Which of the following molecules represents resonance

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 number of anti-bonding electron pairs in O molecular ion on the basis of molecular orbital theory is (atomic no. of O is 8):

Which one of the following is not paramagnetic?