19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A, B, and C are hydroxy-compounds of the elements X, Y, and Z respectively. X, Y, and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids …
Consider the following statements: (I) The radius of an anion is larger than that of the parent atom. (II) The ionization energy generally increases with the increasing atomic number in a period. (III) The electronega…
Which of the following pairs has almost the same atomic radii?
The lower electron affinity of fluorine than that of chlorine is due to
Which of the following properties shows a gradual decrease with an increase in atomic number across a period in the periodic table?
The electronic configurations of the elements X, Y, Z, and J are given below. Which element has the highest metallic character?
Identify the correct order of the size of the following
An element with lowest ionization energy in their respective period is
When a chlorine atom becomes chloride ion, its size
Second electron affinity
Assertion: Third ionization energy of sulphur is larger than phosphorous. Reason: There is a larger amount of stability associated with filled s- and p- sub-shells (a noble gas electron configuration) which correspond…
The number of elements present in fifth period of Periodic Table is
The order of screening effect of electrons of s, p, d and f orbitals of a given shell of an atom on its outer shell electrons is:-
Which one is the correct order of the size of the iodine species.
For a given value of n (principal quantum number), ionization energy is highest for
The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the
Which one of the following ions has the highest value of ionic radius?
Assertion: Generally, ionization enthalpy increases from left to right in a period. Reason: When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of the inner co…
The element with atomic number 57 belongs to
The last element of the p-block in the 6th period is represented by the outermost electronic configuration.
ns and ns outermost electronic configuration belongs to the
The elements with atomic numbers 9, 17, 35, 53, 85 are all
Molybdenum metal is related to which block?
Which of the following order is correct for the size of Fe³⁺, Fe, and Fe²⁺?
Which one of the following pair of elements has similar properties?