19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following properties shows a gradual decrease with an increase in atomic number across a period in the periodic table?
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…
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 …
The lower electron affinity of fluorine than that of chlorine is due to
Second electron affinity
An element with lowest ionization energy in their respective period is
The ionization energy of boron is less than that of beryllium because :
The electronic configurations of the elements X, Y, Z, and J are given below. Which element has the highest metallic character?
From which of the following species it is easiest to remove one electron?
Amongst the following, select the element having highest ionisation enthalpy. (MHT CET 2014)
The compound not acting as a reducing agent is (Manipal 2014)
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
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
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)
The electron affinity of Be is similar to (UP CPMT 2013)
The correct order of decreasing first ionisation potential is (UP CPMT 2013)
The elements ‘X’, ‘Y’, and ‘Z’ form oxides which are acidic, basic, and amphoteric respectively. The correct order of their electronegativity is
Identify the wrong statement in the following (AIPMT 2012)
The electronic configuration of an element is 1s ,2s 2p ,3s 3p 3d ,4s 4p 4d ,5s 5p . From which group of the period table, it belongs ? (KCET 2012)
The correct order of decreasing electronegativity values among the elements I-beryllium, II-oxygen, III-nitrogen and IV-magnesium, is (Kerala CEE 2011)
Which of the following has the highest electron affinity? (AFMC 2011)
The electronegativity of the following elements increases in the order [AFMC 2011]
The increasing order of the density of alkali metal is (Kerala CEE 2011)
The correct order of the decreasing ionic radii among the following isoelectronic species is (CBSE AIPMT 2010)
The element with the electronic configuration as [Ar]3d10 4s2 4p3 represents a (JCECE 2010)