19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The correct order of the sizes of C, N, P, S, is
For the second period elements the correct increasing order of first ionization enthalpy is (NEET 2019)
The lUPAC name of an element with atomic number 119 is (NEET 2022)
Which of the following oxides is most acidic in nature ? (NEET 2018)
Amongst the following, select the element having highest ionisation enthalpy. (MHT CET 2014)
The stability of +1 oxidation state among Al, Ga, In and TI increases in the sequence (AIPMT 2015)
Which of the following pairs contain metalloid elements in the periodic table? (Kerala CEE 2017)
The elements ‘X’, ‘Y’, and ‘Z’ form oxides which are acidic, basic, and amphoteric respectively. The correct order of their electronegativity is
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)
Element with atomic number 38, belongs to (MP PMT 2008)
The discovery of which of the following group of elements gave a death blow to Newland’s law of octaves? (Manipal 2008)
Which two elements in the Periodic Table would you expect to combine in the most violent fashion? (Kerala CEE 2008)
Which represents the correct order of the first ionization potential of third-period elements? (AFMC 2009)
Which of the following is the second most electronegative element?
Increase in atomic size down the group is due to (JCECE 2008)
Diagonal relationship is not shown by (BHU 2008)
Mg and Li are similar in their properties due to (VMMC 2010)
The highest first ionization potential is of
A neutral atom will have the lowest ionization potential when electronic configuration is
Ionization potential for a noble gas is
The ionization energy will be maximum for
Which of the following has the lowest ionization energy?
Ionisation energy decreases down the group due to
The outermost electronic configuration of the most electronegative element is
The increasing order of the density of alkali metal is (Kerala CEE 2011)