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