The correct explanation for the lower atomic radius of Ga as compared to Al is -
1. Poor shielding effect of the 2d-electrons
2. Poor shielding effect of the 3d-electrons
3. Poor shielding effect of the 3p-electrons
4. Poor shielding effect of the 2s-electrons
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen hydrated alumina is treated with an aqueous NaOH solution, it gives-
1.
2.
3.
4. Both (2) and (3)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement among the following options is-
1. | Conc. HNO3 can be transported in an aluminium container. |
2. | Diamond is used as an abrasive. |
3. | A mixture of dilute NaOH and aluminium pieces is used to declog the drain. |
4. | Graphite can't be used as a lubricant. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAluminum trifluoride is insoluble in anhydrous HF but dissolves on addition of NaF because:
1. | Hydrogen fluoride (HF) is a covalent compound and has very strong intermolecular hydrogen bonding. |
2. | Sodium fluoride (NaF) is an ionic compound and free F- is available. |
3. | Both (1) and (2) |
4. | None of the above. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe complex formed on reaction of Sodium hexafluoroaluminate(III) with BF3 is -
1.
2.
3.
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIncorrect statement among the following options is :
1. | Tl (+1) is more stable than Tl (+3). |
2. | For group 13, the stability of the +3 oxidation state decreases down the group. |
3. | Ge, Sn, and Pb show both the +2 and + 4 states. |
4. | None of the above. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology