Chemistry Question Bank

The group valence of the element is generally equal to the

Lewis introduced simple notations to represent valence electrons in an atom called.

The number of dots around the Lewis symbol represents:

The important condition(s) for Lewis dot structure of covalent compounds is/are

The Lewis dot structures can be written by adopting the following steps : I. The total number of electrons required for writing the structure are obtained by adding the valence electrons of the combining atoms. II. Kn…

According to Lewis and Kossel approach, which of the following molecules has complete octet of the central atom?

Match the following species of Column I with information given in Column II choose the correct option from the codes given below. Column I Column II A. BCl3 1. Odd electron molecules B. SF6 2. Incomplete octet C. NO2 …

Atoms can combine either by transfer of valence electrons from one atom to another or by sharing of valence electrons in order to have an octet in their valence shells. This is called.

Lewis postulated that atoms achieve the stable octet when they are linked by

According to Kossel and Lewis approach, the outer shell can accommodate a maximum of …X… electrons. Here, X refers to

Kossel and Lewis approach was based on the

The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a

The compound MX is tetrahedral. The number of XMX angles in the compound is:

Which of the following compounds have the same no. of lone pairs with their central atom? (I) XeF (II) BrF (III) XeF (IV) H S (V) Triple Methylene

What type of hybridization does a BCl3 molecule undergo? a) sp b) sp2 c) sp3 d) sp3d Ans. (b) Sol. In the BCl3 molecule, one s-orbital and two p- orbitals intermix and form three equivalent hybrid orbits. Therefore it…

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 :