
Which of the following is a Lewis acid?
A. \[O{H^ - }\]
B. \[{H^ + }\]
C. \[{F^ - }\]
D. \[N{H_3}\]
Answer
126.6k+ views
Hint: Lewis acid is a substance that can accept a pair of non-bonding electrons. Lewis acid is an electron-pair acceptor.
Complete step by step answer:
Lewis acid is a chemical species that has a vacant orbital which accepts an electron pair from a Lewis base. So, Lewis acid is an electron-pair acceptor. The resulting product formed is called a Lewis adduct. Lewis base is a chemical species that has a filled orbital containing an electron which is not involved in bonding, but can form a bond with a Lewis acid to form a Lewis adduct. So, a Lewis base is an electron-pair donor.
From the above options, we can observe that \[{H^ + }\] is a Lewis base, as it can accept a pair of electrons from an electron donor (Lewis base). The term nucleophile and electrophile are more or less used interchangeably with Lewis base and Lewis acid respectively. However, nucleophilicity and electrophilicity emphasize on the kinetic aspect of reactivity, whereas Lewis basicity and Lewis acidity emphasize on the thermodynamic aspect of the formation of Lewis adduct.
The major advantage of Lewis acid-base theory is that it expands the range of acids and bases, and therefore the number of acid-base reactions.
The interaction between the Lewis base and Lewis acid is indicated by an arrow from the electrons of a Lewis base towards the Lewis acid. For example:\[{H_3}N \to B{F_3}\]
Hence, the correct answer is (B) \[{H^ + }\].
Note: A student can confuse between Lewis acid and Lewis base. Make sure to remember that a Lewis acid is an electron-acceptor while a Lewis base is an electron-donor.
Complete step by step answer:
Lewis acid is a chemical species that has a vacant orbital which accepts an electron pair from a Lewis base. So, Lewis acid is an electron-pair acceptor. The resulting product formed is called a Lewis adduct. Lewis base is a chemical species that has a filled orbital containing an electron which is not involved in bonding, but can form a bond with a Lewis acid to form a Lewis adduct. So, a Lewis base is an electron-pair donor.
From the above options, we can observe that \[{H^ + }\] is a Lewis base, as it can accept a pair of electrons from an electron donor (Lewis base). The term nucleophile and electrophile are more or less used interchangeably with Lewis base and Lewis acid respectively. However, nucleophilicity and electrophilicity emphasize on the kinetic aspect of reactivity, whereas Lewis basicity and Lewis acidity emphasize on the thermodynamic aspect of the formation of Lewis adduct.
The major advantage of Lewis acid-base theory is that it expands the range of acids and bases, and therefore the number of acid-base reactions.
The interaction between the Lewis base and Lewis acid is indicated by an arrow from the electrons of a Lewis base towards the Lewis acid. For example:\[{H_3}N \to B{F_3}\]
Hence, the correct answer is (B) \[{H^ + }\].
Note: A student can confuse between Lewis acid and Lewis base. Make sure to remember that a Lewis acid is an electron-acceptor while a Lewis base is an electron-donor.
Recently Updated Pages
JEE Main 2023 (January 30th Shift 2) Maths Question Paper with Answer Key

Know The Difference Between Fluid And Liquid

JEE Main 2022 (July 25th Shift 2) Physics Question Paper with Answer Key

Classification of Elements and Periodicity in Properties Chapter For JEE Main Chemistry

JEE Main 2023 (January 25th Shift 1) Maths Question Paper with Answer Key

JEE Main 2023 (January 24th Shift 2) Chemistry Question Paper with Answer Key

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility & More

JEE Main Login 2045: Step-by-Step Instructions and Details

JEE Main Exam Marking Scheme: Detailed Breakdown of Marks and Negative Marking

JEE Main 2023 January 24 Shift 2 Question Paper with Answer Keys & Solutions

JEE Mains 2025 Correction Window Date (Out) – Check Procedure and Fees Here!

JEE Main Participating Colleges 2024 - A Complete List of Top Colleges

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics

NCERT Solutions for Class 11 Chemistry Chapter 8 Organic Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 6 Equilibrium

NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrocarbons
