19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which represents the correct order of the first ionization potential of third-period elements? (AFMC 2009)
The element with atomic number 117 has not been discovered yet. In which family would you place this element if discovered? [Kerala CEE 2009]
Which one of the following is correct order of the size? (Haryana PMT 2010)
Ease of formation of the cation is favoured by (RPMT 2010)
Mg and Li are similar in their properties due to (VMMC 2010)
Electronic configuration of an element X having atomic number 24 is (UP CPMT 2010)
The electron affinity of Be is similar to (UP CPMT 2013)
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? (NEET 2013)
According to Mendeleev, elements are arranged in order of their increasing ……A….Here, A refers to
Lothar Meyer drew a graph showing the relation between
Lothar Meyer plotted the physical properties such as atomic volume, melting point and ….A…..against atomic weight. Here, A refers to
Which of the following atom has largest size
According to Alexander Newlands, elements are arranged in…..A….order of their atomic weights. Here A refers to
Which one of the following is the correct order of the size of the ions? (EAMCET 2014) (a) Na Mg F O (b) O F Na Mg (c) Mg Na F O (d) O F Mg Na
The correct arrangement for the ions in the increasing order of their radius is (KCET 2014) (a) Na ,Cl ,Ca (b) Ca ,K ,S (c) Na ,Al ,Be (d) Cl ,F ,S
The formation of the oxide ion, g O from oxygen atom requires first an exothermic and then an endothermic step as shown below: (NEET 2015) o f g g O e O ; H 141kJmol -> o f g g O e O ; H 780kJmol -> …
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
Which of the following pairs contain metalloid elements in the periodic table? (Kerala CEE 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)
The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration? (NEET 2017)
Identify the incorrect match. (NEET 2020) Name IUPAC Official Name
The lUPAC name of an element with atomic number 119 is (NEET 2022)
The period number in the long form of the periodic table is equal to
The statement that is not correct for periodic classification of elements is:
La (Lanthanum) having atomic number 57 is a member of: