Explanation
In 3rd A group Tl shows +1 oxidation state while other member shows +3 oxidation state due to inert pair effect. The inert pair effect is the tendency of the electrons in the outermost atomic S orbital to remain unionized or unshared in compounds of post-transition metals.
So in Tl only outer electron i.e np1 participate in chemical bonding whereas the ns2 do not participate in chemical bonding in a chemical reaction but other elements in that group do not show inert pair effect.
Hence option B is correct.
Germanium(II) hydrides, also called germylene hydrides, are a class of Group 14 compounds consisting of low-valent germanium and a terminal hydride. They are also typically stabilized by an electron donor-acceptor interaction between the germanium atom and a large, bulky ligand. Germanium is the chemical compound with the formula GeH4, and the germanium analogue of methane. It is the simplest germanium hydride and one of the most useful compounds of germanium.
Similarly GeH6 is also one of the hydrides
A hydride is the anion of hydrogen, H−, more commonly, it is a compound in which one or more hydrogen centres have nucleophilic, reducing, or basic properties. In compounds that are regarded as hydrides, the hydrogen atom is bonded to a more electropositive element or group. Compounds containing hydrogen bonded to metals or metalloid may also be referred to as hydrides. Almost all of the elements form binary compounds with hydrogen, the exceptions being He,Ne,Ar,Kr,Pm,Os,Ir,Rn,Fr, and Ra
Plumbane, PbH4, is a metal hydride and group 14 hydride composed of lead and hydrogen.
[1] Plumbane is not well characterized or well known, and it is thermodynamically unstable with respect to the loss of a hydrogen atom.
[2] Derivatives of plumbane include lead tetrafluoride, (PbF4), and tetraethyllead, ((CH3CH2)4Pb)
Al3+ aqueous acid →[Al(H2O)6]3+.
Al3+ ions give a complex ion in which Al3+ ion form six coordinate covalent bonds with six H2O molecules.
Hence, it shows sp3d2 hybridisation.
(Due to availability of vacant 3d-orbitals.)
Al=3s23p1
Al3+=3s0
Four electron pairs denoted by 6H2O molecules.
Correct Option: DHint: The chemical formula of Borax is Na2B4O7.
Explanation:
Na2B4O7+5H2O+2HCl→4H3BO3+2NaCl
1. It is not a tribasic acid.
Option A is incorrect for H3BO3.
2. Aqueous solution, instead of donating the −OH group it breaks the H−OH bond of water and accepts the −OH group from it leaving in the solution hence it is mono basic acid.
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