NCERT Exercise Based MCQs The p-Block Elements (XI) Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

BCl₃ has higher stability than ${TlCl}_{3}$ , because -

1.	The +2 oxidation state of Tl is more stable than the +2 oxidation state of B
2.	The +2 oxidation state of B is more stable than the +2 oxidation state of Tl
3.	The +3 oxidation state of B is more stable than the +3 oxidation state of Tl
4.	The +3 oxidation state of Tl is more stable than the +3 oxidation state of B

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

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Boron trifluoride behaves as a Lewis acid because -

1. Boron trifluoride is electron-rich.

2. Boron trifluoride is electron-deficient.

3. Boron trifluoride is highly stable.

4. None of these.

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

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The correct statement among the following regarding behavior of ${BCI}_{3}$ $and$ ${CCI}_{4}$ in water is -

1.	BCI 3 readily undergoes hydrolysis while CCI 4 completely resists hydrolysis.
2.	CCI 4 readily undergoes hydrolysis while BCI 3 completely resists hydrolysis.
3.	Both BCI 3 and CCI 4 readily undergo hydrolysis.
4.	Neither BCI 3 nor CCI 4 undergo hydrolysis.

Subtopic: Compounds of Carbon, Preparations, Properties & Uses |

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Boric acid is a-

1. Protic acid.

2. Weak monobasic acid.

3. Lewis acid.

4. Both '2' and '3'

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

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The effect of heating Boric acid at 370 K or above is -

1. Orthoboric acid changes to metaboric acid.

2. Metaboric acid changes to boric oxide.

3. Both '1' and '2'

4. Neither '1' nor '2'

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

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The electron-deficient compound among the following is -

1. ${SiCl}_{4}$

2. ${BCl}_{3}$

3. ${PCl}_{3}$

4. $ICl$

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

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The hybridization of carbon in (a) ${CO}_{3}^{2 -}$ (b) diamond (c) graphite is respectively-

1. ${sp}^{2}$ , ${sp}^{3}$ , ${sp}^{2}$

2. ${sp}^{2}$ , ${sp}^{3}$ , $s p^{3}$

3. ${sp}^{3}$ , ${sp}^{3}$ , ${sp}^{2}$

4. ${sp}^{3}$ , ${sp}^{2}$ , ${sp}^{3}$

Subtopic: Compounds of Carbon, Preparations, Properties & Uses |

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The B–F bond lengths in ${BF}_{3}$ (130 pm) and $B {F_{4}}^{-}$ (143 pm) differ because of-

1. Presence of triple bond character in ${BF}_{3}$

2. Resonance in $B {F_{4}}^{-}$

3. Presence of a double bond character in ${BF}_{3}$

4. Presence of a double bond character in $B {F_{4}}^{-}$

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

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Despite the dipole moment in the B–Cl bond, the BCl₃ molecule as a whole has no dipole moment because:

1.	The respective dipole-moments of the B–Cl bond add with each other
2.	The respective dipole moments of the B–Cl bond cancel each other
3.	BCl₃ is tetrahedral in shape
4.	None of the above

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

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CO is a poisonous gas because :

1.	It forms a complex with hemoglobin.
2.	The CO–Hb complex is about 300 times more stable than the O 2 –Hb complex.
3.	It can kill a person through suffocation on not receiving oxygen.
4.	All of the above.

Subtopic: Compounds of Carbon, 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

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

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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

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