19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following oxides is most acidic in nature ? (NEET 2018)
The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration? (NEET 2017)
The plot of square root of frequency of X-ray emitted against atomic number led to the suggestion of which law/rule? (MHT CET 2017)
Which of the following pairs contain metalloid elements in the periodic table? (Kerala CEE 2017)
Which of the following is the correct order of stability for the given superoxide’s ? (JIPMER 2017) (a) KO RbO CsO (b) CsO RbO KO (c) RbO CsO KO (d) KO CsO RbO
The correct arrangement of the elements in the order of decreasing ionization energies is
The maximum tendency to form uni-positive ion is for the element which has the following electronic configuration
Which element has the highest ionization energy?
An element will have lowest ionisation potential when its electronic configuration is
The order of ionization potential between He+ ion and H-atom (both species are in gaseous state) is
The correct order of second I.E. of C, N, O and F are in the order
Arrange the following atoms in order of increasing first ionization energy K, Cs, Rb, Ca
The element which has highest first ionization energy in the periodic table is
Correct order of first ionization potential among the following elements Be, B, C, N, O is
The elements with atomic numbers 9, 17, 35, 53, 85 are all
Identify the electronic configuration of transition element.
Which of the following ions has the smallest radius?
When a chlorine atom becomes chloride ion, its size
Molybdenum metal is related to which block?
Manganese is related to which block of the Periodic Table?
Which of the following pairs has almost the same atomic radii?
The single covalent radius of P is 0.11 nm The single covalent radius of Cl will be :
In isoelectronic species of Mg2+, N3–, Al3+, the order of decreasing ionic radii will be
Identify the correct order in which the ionic radius of the following ions increases (I) F– (II) Na+ (III) N3–
Correct order of radii is