19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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.
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…
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
Which molecule has regular geometry? (I) SnCl (II) NH (III) PCl (IV) SF
Given the correct order of initials T or F for the following statements. Use T is statement is true and F if it is false: (I) The order of repulsion between different pair of electrons is LP – LP > LP –BP > BP – BP (I…
Which molecular geometry is least likely to result from a trigonal bipyramidal electron geometry?
Given the correct order of initials T or F for the following statements. Use T if statements is true and F if it is false: (I) CH P CF is non-polar and CH P CF is polar molecule (II) CH P CH bond angles a…