Chemistry Question Bank

Lewis dot structure of CO,NO2- and CO32- are I, II and III respectively. Which of these structure(s) is/are wrong?

Which of the following Lewis representation of the molecules NF3, O3 and HNO3 is correct?

How many double bonds are present in carbon dioxide molecule?

When two atoms share two electron pairs they are said to be joined by a

Which of the following compound is covalent?

Find out the correct Lewis symbol for the atom carbon among the following options.

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

Cl–C2 bond of this molecule is formed by

CH2 = C = CH2 In this molecule (allene)

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…

Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.

In which of the following pairs, both the species have the same hybridization? (I) SF4, XeF4 (II) - I ,XeF (III) ICl ,SiCl (IV) - 3- ClO ,PO

Which one of the following is the correct set with respect to molecule, hybridization and shape ?

Which of the following statements is incorrect for PCl5?