An element that cannot form MF63- ion is -
1. Ga
2. Al
3. B
4. In

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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The correct order of atomic radii among the group 13 elements is-

1. B < Al < In < Ga < Tl
2. B < Al < Ga < In < Tl
3. B < Ga < Al < Tl < In
4. B < Ga < Al < In < Tl

Subtopic:  Boron Family- Preparations, Properties & Uses |
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It is because inability of ns2 electrons of the valence shell to participate in bonding that

(1) Sn2+ is reducing while Pb4+ is oxidising agent

(2) Sn2+ is oxidising while Pb4+ is reducing agent

(3) Sn2+ and Pb2+ are both oxidising and reducing agent

(4) Sn4+ is reducing while Pb4+ is oxidising agent

Subtopic:  Carbon Family - Preparations, Properties & Uses |
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The correct statement regarding inert pair effect is -

1. Sn2+ is an oxidizing agent while Pb4+ is a reducing agent

2. Sn2+ and Pb2+ both are oxidizing agents

3. Sn4+ is a reducing agent while Pb4+ is an oxidizing agent

4. Sn2+ is a reducing agent while Pb4+ is an oxidizing agent

Subtopic:  Carbon Family - Preparations, Properties & Uses |
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AlF3 is soluble in HF only in the presence of KF due to the formation of-

1.  K3AIF3H3
2.  K3AIF6
3.  AIH3
4.  KAIF3H

Subtopic:  Boron Family- Preparations, Properties & Uses |
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