Acids & Bases - Definitions & Classification Recommended PYQs (STRICTLY NCERT Based) Equilibrium Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

The conjugate bases of Bronsted acids H₂O and HF are respectively:

1. H₃O⁺ and H₂F⁺, respectively

2. OH^- and H₂F⁺, respectively

3. H₃O⁺ and F^-, respectively

4. OH^- and F^-, respectively

Subtopic: Acids & Bases - Definitions & Classification |

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Which of the following cannot act both as a Bronsted acid and as a Bronsted base?

1. $H C O_{3}^{-}$

2. ${NH}_{3}$

3. HCl

4. $H S O_{4}^{-}$

Subtopic: Acids & Bases - Definitions & Classification |

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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

Subtopic: Acids & Bases - Definitions & Classification |

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Which of the following fluoro-compounds is most likely to behave as a Lewis base?
1. BF₃
2. PF₃
3. CF₄
4. SiF₄

Subtopic: Acids & Bases - Definitions & Classification |

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Among the following the correct order of acidity is

1. HClO < HClO₂< HClO₃< HClO₄
2. HClO₂< HClO < HClO₃< HClO₄
3. HClO₄< HClO₂< HClO < HClO₃
4. HClO₃< HClO₄< HClO₂< HClO

Subtopic: Acids & Bases - Definitions & Classification |

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Which of these is least likely to act as Lewis base?
1. F^–
2. BF₃
3. PF₃
4. CO

Subtopic: Acids & Bases - Definitions & Classification |

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Which of the following molecular hydrides acts as a Lewis acid ?

1. $N H_{3}$

2. $H_{2} O$

3. $B_{2} H_{6}$

4. $C H_{4}$

Subtopic: Acids & Bases - Definitions & Classification |

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The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence

1. $B C l_{3} > B F_{3} > B B r_{3}$

2. $B B r_{3} > B C l_{3} > B F_{3}$

3. $B B r_{3} > B F_{3} > B C l_{3}$

4. $B F_{3} > B C l_{3} > B B r_{3}$

Subtopic: Acids & Bases - Definitions & Classification |

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Which of the following molecules acts as a Lewis acid?

1. (CH₃)₃B

2. (CH₃)₂O

3. (CH₃)₃P

4. (CH₃)₃N

Subtopic: Acids & Bases - Definitions & Classification |

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Which ionic species has the greatest proton affinity to form stable compounds?

1. $H S^{-}$

2. $N H_{2}^{-}$

3. $F^{-}$

4. $l^{-}$

Subtopic: Acids & Bases - Definitions & Classification |

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