Chemistry Classification of Elements and Periodicity in Properties

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion (A) : The first ionization enthalpy for oxygen is lower than that of nitrogen

Reason (R) : The four electrons in 2p orbitals of oxygen experience more electron electorn repulsion.

In the light of the above statements, choose the correct answer from the options given below:

Which of the following orders is wrong?

 Which of the following orders is wrong?

Which of the following orders is wrong?

Consider the following orders given below.

(i) S > Se > Te > O (Electron Affinity)

(ii) $N^{-3}>O^{2-}>F^{-}>N{a}^{+}>M{g}^{2+}$  (Ionic Size)

(ii) Fe²⁺ > Fe³⁺ > Fe⁴⁺ (Ionization Enthalpy)

(iv) H < B < P < C < Cl (Electronegativity)

(v) Na⁺ < Mg²⁺ < Al³⁺ (Extent of hydration)

(vi) Li > Na > K > Rb > Cs (Reducing Nature)

(vii) LiF(s) > LiCl(s) > LiBr(s) (Lattice Energy)

If x = number of correct orders

y = number of incorrect orders

then the value of $\left(1+\frac{y}{x}\right)$  is.

If x = Group number of Europium (atomic number 63)

y = Period number of Americium (atomic number 95)

z = Most stable oxidation state shown by Gadolinium (atomic number 64)

The sum of “number off filled orbitals” and “number of vacant orbitals” upto valence shell of Fe is

What will be the name of atomic number 114 according to the IUPAC nomenclature and its symbol respectively is:

The five successive ionization enthalpies of an element are 710, 1414, 2550, 28124 and 33845 kJ mol?¹. How many moles of H?SO? will be needed to react completely with 4 moles of the metal hydroxide?

The set that contains atomic numbers of only inner transition elements is: