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Assertion and Reas on Read the assertion and reason carefully to mark the correct option out of the option given below : Assertion : The $ [Ni(en)_3]Cl_2$ has lower stability than $(Ni(NH_3)_6]Cl_2$ Reason : In $ [Ni(en)_3]Cl_2 $ the geometry of Ni is trigonal bipyramidal.
Assertion and Reas on Read the assertion and reason carefully to mark the correct option out of the option given below : Assertion : $ H_2N - NH_2 $ is a chelating ligand. Reason : A chelating ligand must possess two or more lone pair at such distance that it may form suitable strain free ring at the metal ion.
Assertion and Reas on Read the assertion and reason carefully to mark the correct option out of the option given below : Assertion : $[Ti(H_2O)_6]^{+3} $ is coloured while $ [Sc(H_2O)_6]^{+3} $ is Colourless Reason : d-d transition is not possible in $ [Sc(H_2O)_6]^{+3} $
The assertion that $[Ti(H_2O)_6]^{3+}$ is colored while $[Sc(H_2O)_6]^{3+}$ is colorless is true. The reason is also true: d-d transition is not possible in $[Sc(H_2O)_6]^{3+}$ because Scandium in the +3 oxidation state has an electron configuration of $[Ar]3d^0$, meaning there are no d-electrons to undergo d-d transitions, which are responsible for the color. Therefore, both the assertion and reason are true, and the reason correctly explains the assertion. The correct option is o1.
Assertion and Reas on Read the assertion and reason carefully to mark the correct option out of the option given below : Assertion : All the octahedral complexes of $Ni^{+2} $ must be outer orbital complexes. Reason : Outer orbital octahedral complexes are given by weak ligand.
Which groups of elements are called d-block elements in modern periodic table ?
The d-block elements are found in groups 3 to 12 in the modern periodic table. These elements are also known as transition metals and they are characterized by the filling of d-orbitals. The d-block includes elements like iron (Fe), copper (Cu), and zinc (Zn).
Which block elements are more electropositive in modern periodic table ?
The s-block elements are more electropositive in the modern periodic table. Electropositivity refers to the ability of an element to donate electrons and form positive ions. The s-block includes the alkali metals (Group 1) and alkaline earth metals (Group 2), which are highly electropositive elements. For example, sodium (Na) and magnesium (Mg) are part of the s-block and are known for their high electropositivity.
Which block elements are less electropositive in modern periodic table ?
The p-block elements are less electropositive in the modern periodic table. Elements in the p-block include groups 13 to 18 and are characterized by the filling of p-orbitals. These elements have higher electronegativities compared to s-block elements. For example, fluorine (F) and oxygen (O) are part of the p-block and are known for their high electronegativity, meaning they are less likely to lose electrons and form positive ions.
Which elements transist between more electropositive and less electropositive elements ?
The d-block elements, also known as transition metals, typically exhibit a transition between more electropositive and less electropositive elements. This is due to their position in the periodic table where they lie between the s-block (more electropositive) and the p-block (less electropositive) elements.
In modern periodic table, by which name d-block elements are known ?
In the modern periodic table, the d-block elements are known as transition elements. These elements are characterized by having partially filled d orbitals and are located in groups 3 to 12.
Which of the following is an electronic configuration at Th ?
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.