Q. No.Boric acid is an acid because its molecule
1. Contains replaceable H+ ion
2. Gives up a proton
3. Accepts OH- from water releasing proton into the solution
4. Combines with proton from water molecules
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Correct statement among the following is -
1. Sn2+ is oxidising agent while Pb4+ is reducing agent.
2. Sn2+ and Pb2+ both are oxidising agent.
3. Sn4+ is reducing agent while Pb4+ is oxidising agent.
4. Sn2+ is reducing agent while Pb4+ is oxidising agent.
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The correct order of atomic radii in 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
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1. Sheet silicate
2. Pyrosilicate
3. Three dimensional silicate
4. Linear chain silicate
Al2O3 can be converted to anhydrous AlCl3 by heating :
1.
2. with NaCl in solid state
3. a mixture of and carbon in dry gas
4. with gas
Which of the following is an incorrect statement?
| 1. | SnF4 is ionic in nature. |
| 2. | PbF4 is covalent in nature. |
| 3. | SiCl4 is easily hydrolysed. |
| 4. | GeX4 (X=F, Cl, Br, I) is more stable than GeX2. |
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Aluminium chloride in acidified aqueous solution forms a complex 'A', in which hybridisation state of Al is 'B'. What are 'A' and 'B' respectively?
1. [Al(H2O)6]3+, sp3d2
2. [Al(H2O)4]3+, sp3
3. [Al(H2O)4]3+, dsp2
4. [Al(H2O)]3+, d2sp3
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Which of the following compounds is used in cosmetic surgery?
1. Silica
2. Silicates
3. Silicones
4. Zeolites
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