Classification of Elements and Periodicity in Properties questions
826 published questions with worked solutions.
- The IUPAC name of an element with atomic number 119 is :
- Gadolinium has a low value of third ionisation enthalpy because of :
- Given below are two statements: Statement I: The second ionization enthalpy of B, Al and Ga is in the order of B > Al > Ga....
- Given below are two statements: Statement I: Among Zn, Mn, Sc and Cu, the energy required to remove the third valence electron is...
- Among Fe²⁺, Fe³⁺, Cr²⁺ and Zn²⁺, the ion that shows positive borax bead test and with highest ionisation enthalpy is:
- Given below are two statements: Statement (I): The first ionisation enthalpy of the elements Na, Mg, Cl and Ar follows the order...
- The 1st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2nd ionization enthalpy of Mg is...
- Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number: Eu-63, Gd-64, Dy-66,...
- Given below are two statements: Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is F>O>N....
- In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme...
- Given below are two statements: Statement I: F₂O<H₂O<Cl₂O is the correct trend in terms of bond angle. Statement II: SiF₄, SnF₄...
- The correct order of first (Δ_iH₁) and second (Δ_iH₂) ionisation enthalpy values of Cr and Mn are: A. Δ_iH₁: Cr>Mn B. Δ_iH₂:...
- First and second ionization enthalpies of lithium are 520 kJ mol⁻¹ and 7297 kJ mol⁻¹ respectively. Energy required to convert 3.5...
- Match List-I with List-II. List-I (Electronic configuration of neutral atom (where n = 2)): A. ns², B. ns²np¹, C. ns²np³, D....
- The element expected to form largest ion to achieve the nearest noble gas configuration is :
- From the following pairs of ions which one is not an iso-electronic pair?
- Match List I with List II List-I (Element): A. N, B. S, C. Br, D. Kr List-II (Electronic Configuration): I. [Ar] 3d¹⁰ 4s² 4p⁵,...
- A transition metal 'M' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionisation enthalpy. The spin only magnetic moment...
- Given below are two statements : Statement (I) : The oxidation state of an element in a particular compound is the charge...
- Choose the correct option having all the elements with d¹⁰ electronic configuration from the following :
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