Al2O3 reacts with-

1.  Only water

2.  Only acids

3.  Only alkalis

4.  Both acids and alkalis

Subtopic:  Boron Family- Preparations, Properties & Uses |
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B2H6 can't be prepared by -

1. NaBH4  + I2 

2. BF3  + NaH 

3. B3N3H6  + H2O 

4. Mg3B2 + dil HCl

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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An anion present in the chain structure silicate is -

1. Si2O76-

2. (Si2O52-)n

3. (SiO32-)n

4. SiO44-

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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The most characteristic oxidation state for lead and tin is respectively:

1. +4, +2

2. +2, +4

3. +4, +4

4. +2, +2

Subtopic:  Properties of Glass, Pb & Sn compounds |
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H3BO3 is -

1. A Monobasic acid and a weak Lewis acid

2. A Monobasic and a weak Bronsted acid

3. A Monobasic and a strong Lewis acid

4. A Tribasic and a weak Bronsted acid

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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An anion that cannot be formed by Boron is -

1. BF63-

2. BH4-

3. B(OH)4-

4. BO2-

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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When silicon is boiled with caustic soda solution, the gas is evolved is-

1. O2

2. SiH4

3. H2

4. None of the above

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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The basic structural unit of silicates is-

1. SiO44-

2. (SiO3)2-

3. SiO42-

4. SiO-

Subtopic:  Carbon Family - Preparations, Properties & Uses |
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A compound among the following that is not a monomer for a high molecular mass silicone polymer is-

1. Me3SiCl

2. PhSiCl3

3. MeSiCl3

4. Me2SiCl2

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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White fumes appear around the bottle of anhydrous AlCl3. This is due to -

1. Formation of Al(OH)3

2. Dimerisation of AlCl3

3. Hydrolysis of AlCl3 give HCl gas

4. Absorption of moisture 

Subtopic:  Boron Family- Preparations, Properties & Uses |
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