Aqueous solution of borax above 62°C gives crystals of
Correct answer: B. Na2B4O7.5H2O
- A. Na2B4O7.4H2O
- B. Na2B4O7.5H2O
- C. Na2B4O7.2H20
- D. Na2B4O7.10H20
Explanation
Na2B4O7.5H2O: This hydrate has moderate solubility and could potentially crystallize at 62°C, depending on the concentration of the solution.Therefore, based on the relative solubilities of these hydrates, Na2B4O7.5H2O (option b) is the most likely candidate to form crystals in an aqueous solution of borax above 62°C. The higher water content hydrates and the anhydrous form would likely remain dissolved under these conditions.It's important to note that factors like solution concentration and cooling rate can also influence crystal formation. However, considering the general solubilities of the different borax hydrates, option (b) remains the most probable answer.
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Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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