Careers360 Logo
Search Colleges, Exams, Schools & more
ask-icon
share
    JEE Mains 2026: Most Scoring Topics in Chemistry, Chapter-wise Weightage
    1. Home
    2. JEE Main
    3. Study Material
    4. Orthoboric Acid - Practice Questions & MCQ

    Orthoboric Acid - Practice Questions & MCQ

    Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main

    Quick Facts

    • 17 Questions around this concept.

    Solve by difficulty

    QuestionEASY

    Boric acid is polymeric due to 

    View Solution

    Boric acid is an acid because its molecule:

    View Solution

    Which compound is obtained on red heat of orthoboric acid?

    View Solution

    Boric Acid is used - 

    View Solution

    Boric acid is an acid because its molecule

    View Solution

    Which compound is prepared when $\mathrm{SO}_{2(g)}$ is passed through the suspension of colemanite ore in hot water?

    View Solution

    Concepts Covered - 0

    Orthoboric Acid

    Orthoboric acid, H3BO3 is a white crystalline solid, with soapy touch. It is sparingly soluble in water but highly soluble in hot water. It can be prepared by acidifying an aqueous solution of borax.

    \mathrm{Na_{2}B_{4}O_{7}\: +\: 2HCl\: +\: 5H_{2}O\: \rightarrow 2NaCl\: +\: 4B(OH)_{3}}

    It is also formed by the hydrolysis (reaction with water or dilute acid) of most boron compounds (halides, hydrides, etc.). It has a layer structure in which planar BO3 units are joined by hydrogen bonds as shown in the figure given below. 
    Boric acid is a weak monobasic acid. It is not a protonic acid but acts as a Lewis acid by accepting electrons from a hydroxyl ion:

    \mathrm{BOH_{3}\: +\: 2HOH\: \rightarrow \: [B(OH)]^{-}\: +\: H_{3}O^{+}}

    On heating, orthoboric acid above 370K forms metaboric acid, \mathrm{HBO_2} which on further heating yields boric oxide, \mathrm{B_2O_3}.

    \mathrm{H_{3}BO_{3}\: \overset{\Delta }{\rightarrow}\: HBO_{2}\: \overset{\Delta }{\rightarrow}\: B_{2}O_{3}}

    Study other Related Concepts

    Orthoboric Acid Current Topic

    Physical Properties of Boron Family
    Anomalous Behaviour of Boron
    Diagonal Relationship of B and Si
    Chemical Properties of Boron Family
    Diborane
    Orthoboric Acid
    Borax Formula
    Group 14 Elements (Carbon Family)
    Allotropes of Carbon
    Carbon monoxide and carbon dioxide

    "Stay in the loop. Receive exam news, study resources, and expert advice!"

    Get Answer to all your questions

    B.Tech/B.Arch Admissions OPEN

    Amity University Noida-B.Tech Admissions 2026
    Apply

    Among top 100 Universities Globally in the Times Higher Education (THE) Interdisciplinary Science Rankings 2026

    UPES B.Tech Admissions 2026
    Apply

    Last Date to Apply: 15th June | Ranked #43 among Engineering colleges in India by NIRF | Highest Package 1.3 CR , 100% Placements

    Geeta University B.Tech Admissions 2026
    Apply

    40 LPA Highest Package | Up to 100% Scholarship worth 24 Crore via GUTS exam

    Guru Nanak College - B.Tech 2026
    Apply

    3000+ Successful Placements | 100+ Leading Recruiters

    Arya College of Engineering & IT Admissions
    Apply

    Awarded A Grade by RTU, Kota | Top Recruiters-Google, Microsoft, Adobe, IBM, TCS, LTI and many more

    VIT Bhopal University | B.Arch Admissions 2026
    Apply

    Mark presence in the Modern Architectural field with Bachelor of Architecture | Highest CTC : 70 LPA | Accepts NATA Score

    View all Application Forms

    Student Community: Where Questions Find Answers

    Ask and get expert answers on exams, counselling, admissions, careers, and study options.
    Download Careers360 App
    All this at the convenience of your phone

    • Regular Exam Updates

    • Best College Recommendations

    • College & Rank predictors

    • Detailed Books and Sample Papers

    • Question and Answers

    Scan and download the app

    OR

    College Predictor