AIPMT-PRELIMS Chemistry Classification of Elements & Periodicity in Properties Class 11 Questions

Identify the wrong statement in the following:

Which of the following pairs has the same size?

The correct order of the decreasing ionic radii among the following isoelectronic species is

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?

Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?

H₂COH · CH₂OH on heating with periodic acid gives:

Which one of the following arrangements does not give the correct picture of the trends indicated against it ?

With which of the following electronic configuration an atom has the lowest ionisation enthalpy?

Which one of the following ionic species has the greatest proton affinity to form stable compound?

Which of the following is the most basic oxide?

Which one of the following orders is not in accordance with the property stated against it?

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

Ionic radii are :-

The ions O²⁻, F⁻, Na⁺, Mg²⁺ and Al³⁺ are isoelectronic. Their ionic radii show :

Which of the following statement is true :-

Which of the following order is wrong :-

An atom has electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹ 4s², you will place it in which group :-

Correct order of 1^{st} IP among following elements Be, B, C, N, O is :-

Which statement is wrong :