Question:
Boric acid is an acid because its molecule
Boric acid is an acid because its molecule
Updated On: Apr 17, 2024
- contains replaceable $H^{+}$ ion
- gives up a proton
- accepts $OH^{-}$ from water releasing proton
- combines with proton from water molecule
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Lewis acids are substances whose octet is incomplete and accepts electrons.
Boric acid is a monobasic weak acid. It does not liberate $H ^{+}$ ion but accepts electrons from $OH ^{-}$ ion i.e., behaves as Lewis acid.
$H _{3} PO _{3}+ H _{2} O \rightarrow B ( OH )_{4}^{-}+ H ^{+}$
or $B ( OH )_{3}+2 H _{2} O \rightarrow\left[ B ( OH )_{4}\right]^{-}+ H _{3} O ^{+}$
The structure of $H _{3} BO _{3}$ is as shown below, where the octet of boron in $H _{3} BO _{3}$ is incomplete.
Boric acid is a monobasic weak acid. It does not liberate $H ^{+}$ ion but accepts electrons from $OH ^{-}$ ion i.e., behaves as Lewis acid.
$H _{3} PO _{3}+ H _{2} O \rightarrow B ( OH )_{4}^{-}+ H ^{+}$
or $B ( OH )_{3}+2 H _{2} O \rightarrow\left[ B ( OH )_{4}\right]^{-}+ H _{3} O ^{+}$
The structure of $H _{3} BO _{3}$ is as shown below, where the octet of boron in $H _{3} BO _{3}$ is incomplete.
Was this answer helpful?
0
0
Top Questions on p -Block Elements
- $\textbf{Choose the correct statements about the hydrides of group 15 elements.}$
A. The stability of the hydrides decreases in the order \(\text{NH}_3 > \text{PH}_3 > \text{AsH}_3 > \text{SbH}_3 > \text{BiH}_3\)
B. The reducing ability of the hydrides increases in the order \(\text{NH}_3 < \text{PH}_3 < \text{AsH}_3 < \text{SbH}_3 < \text{BiH}_3\)
C. Among the hydrides, \(\text{NH}_3\) is a strong reducing agent while \(\text{BiH}_3\) is a mild reducing agent.
D. The basicity of the hydrides increases in the order \(\text{NH}_3 < \text{PH}_3 < \text{AsH}_3 < \text{SbH}_3 < \text{BiH}_3\)
Choose the most appropriate from the option given below:- JEE Main - 2024
- Chemistry
- p -Block Elements
- $\textbf{Reduction potential of ions are given below:}$
\[ \begin{array}{ccc} \text{ClO}_4^- & \text{IO}_4^- & \text{BrO}_4^- \\ E^\circ = 1.19 \, \text{V} & E^\circ = 1.65 \, \text{V} & E^\circ = 1.74 \, \text{V} \\ \end{array} \]
The correct order of their oxidising power is:- JEE Main - 2024
- Chemistry
- p -Block Elements
- Identify the correct statements about p-block elements and their compounds.
(A) Non metals have higher electronegativity than metals.
(B) Non metals have lower ionisation enthalpy than metals.
(C) Compounds formed between highly reactive nonmetals and highly reactive metals are generally ionic.
(D) The non-metal oxides are generally basic in nature.
(E) The metal oxides are generally acidic or neutral in nature.- JEE Main - 2024
- Chemistry
- p -Block Elements
- In which of the following species, the ratio of s-electrons to p-electrons is the same?
- TS EAMCET - 2024
- Chemistry
- p -Block Elements
The number of oxygen atoms present in chemical formula of fuming sulphuric acid is _______.
- JEE Main - 2024
- Chemistry
- p -Block Elements
View More Questions
Questions Asked in NEET exam
- A metallic bar of Young’s modulus, 0.5 × 1011 N m–2 and coefficient of linear thermal expansion 10–5 °C–1, length 1 m and area of cross-section 10–3 m2 is heated from 0°C to 100°C without expansion or bending. The compressive force developed in it is :
- NEET (UG) - 2024
- Youngs double slit experiment
- In a uniform magnetic field of \(0.049 T\), a magnetic needle performs \(20\) complete oscillations in \(5\) seconds as shown. The moment of inertia of the needle is \(9.8 \times 10 kg m^2\). If the magnitude of magnetic moment of the needle is \(x \times 10^{-5} Am^2\); then the value of '\(x\)' is
- NEET (UG) - 2024
- Magnetic Field
- A particle moving with uniform speed in a circular path maintains :
- NEET (UG) - 2024
- Uniform Circular Motion
- Match List I with List II.Choose the correct answer from the options given below:
List I
(Molecule)List II
(Number and types of bond/s between two carbon atoms)A. ethane I. one σ-bond and two π-bonds B. ethene II. two π-bonds C. carbon molecule, C2 III. one σ-bonds D. ethyne IV. one σ-bond and one π-bond - NEET (UG) - 2024
- Classification Of Organic Compounds
- If the plates of a parallel plate capacitor connected to a battery are moved close to each other, then
A. the charge stored in it, increases.
B. the energy stored in it, decreases.
C. its capacitance increases.
D. the ratio of charge to its potential remains the same.
E. the product of charge and voltage increases.
Choose the most appropriate answer from the options given below :- NEET (UG) - 2024
- Capacitors in Parallel and in Series
View More Questions
Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family