${Al}_{2} O_{3}$ 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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$B_{2} H_{6}$ can't be prepared by -

1. ${NaBH}_{4} + I_{2} \to$

2. ${BF}_{3} + NaH \to$

3. $B_{3} N_{3} H_{6} + H_{2} O \to$

4. ${Mg}_{3} B_{2} + dil HCl \to$

Subtopic: Compounds of Boron- Preparations, Properties & Uses |

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An anion present in the chain structure silicate is -

1. ${Si}_{2} O_{7}^{6 -}$

2. ${({Si}_{2} O_{5}^{2 -})}_{n}$

3. ${({SiO}_{3}^{2 -})}_{n}$

4. ${SiO}_{4}^{4 -}$

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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$H_{3} {BO}_{3}$ 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. ${BF}_{6}^{3 -}$

2. ${BH}_{4}^{-}$

3. $B {(OH)}_{4}^{-}$

4. ${BO}_{2}^{-}$

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. $O_{2}$

2. ${SiH}_{4}$

3. $H_{2}$

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. ${({SiO}_{4})}^{4 -}$

2. ${({SiO}_{3})}^{2 -}$

3. ${({SiO}_{4})}^{2 -}$

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. ${Me}_{3} SiCl$

2. ${PhSiCl}_{3}$

3. ${MeSiCl}_{3}$

4. ${Me}_{2} {SiCl}_{2}$

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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Select Chapter Topics:

Boron Family- Preparations, Properties & Uses

Anomalous Behaviour of B & C

Compounds of Boron- Preparations, Properties & Uses

Carbon Family - Preparations, Properties & Uses

Structure & Properties of Allotropes of C

Compounds of Carbon, Preparations, Properties & Uses

Properties of Structure of SiO2 & Other Compounds

Properties of Glass, Pb & Sn compounds

${Al}_{2} O_{3}$ reacts with-

1. Only water

2. Only acids

3. Only alkalis

4. Both acids and alkalis

Select Chapter Topics:

Boron Family- Preparations, Properties & Uses

Anomalous Behaviour of B & C

Compounds of Boron- Preparations, Properties & Uses

Carbon Family - Preparations, Properties & Uses

Structure & Properties of Allotropes of C

Compounds of Carbon, Preparations, Properties & Uses

Properties of Structure of SiO2 & Other Compounds

Properties of Glass, Pb & Sn compounds

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Select Chapter Topics:

Boron Family- Preparations, Properties & Uses

Anomalous Behaviour of B & C

Compounds of Boron- Preparations, Properties & Uses

Carbon Family - Preparations, Properties & Uses

Structure & Properties of Allotropes of C

Compounds of Carbon, Preparations, Properties & Uses

Properties of Structure of SiO2 & Other Compounds

Properties of Glass, Pb & Sn compounds

Al2O3 reacts with- 1. Only water 2. Only acids 3. Only alkalis 4. Both acids and alkalis

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Select Chapter Topics:

Boron Family- Preparations, Properties & Uses

Anomalous Behaviour of B & C

Compounds of Boron- Preparations, Properties & Uses

Carbon Family - Preparations, Properties & Uses

Structure & Properties of Allotropes of C

Compounds of Carbon, Preparations, Properties & Uses

Properties of Structure of SiO2 & Other Compounds

Properties of Glass, Pb & Sn compounds

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions

${Al}_{2} O_{3}$ reacts with-

1. Only water

2. Only acids

3. Only alkalis

4. Both acids and alkalis