Answer
Verified
452.7k+ views
Hint: Boron belongs to p-block and is the first member of its group. Boric acid has a formula of $B[OH]_3$. It is also known as orthoboric acid. It is monobasic Lewis acid. Oxygen gives one electron to boron, so it acquires a positive charge and becomes unstable, so it furnishes $1H^+$ and gets stable.
Complete answer:
A] As boron is small in size and boron has 5 electrons in its valence shell. It accepts $OH^-$ from the water molecule and loses its proton.
\[\]$B\mathop {\left( {OH} \right)}\nolimits_3 + \mathop H\nolimits_2 O \to \left\{ {B\mathop {\left[ {OH} \right]}\nolimits_4 } \right\} + \mathop H\nolimits^ + $
Hence this option is correct
B] It does not combine with a proton to form a water molecule rather it loses its proton too. so, this option is completely wrong
C] The acids are also those which contains replaceable hydrogen ion as HCl but not boric acid and hence this option also goes wrong
D] The compounds which give up proton are called Bronsted Acid for example nitric acid. so, this option is also wrong.
Our required Ans is ‘A’ that is accepts $OH^-$ ion from water and gives proton.
Note:
Orthoboric acid or boric acid is white, needle-like crystals and have a soapy touch
It is prepared by treating concentrated sulphuric acid with borax.
On heating to high temp say 373K it gives metabolic acid.
It is used in antiseptics, in the manufacturing of enamels, food preservatives,s and in the glass industry.
Complete answer:
A] As boron is small in size and boron has 5 electrons in its valence shell. It accepts $OH^-$ from the water molecule and loses its proton.
\[\]$B\mathop {\left( {OH} \right)}\nolimits_3 + \mathop H\nolimits_2 O \to \left\{ {B\mathop {\left[ {OH} \right]}\nolimits_4 } \right\} + \mathop H\nolimits^ + $
Hence this option is correct
B] It does not combine with a proton to form a water molecule rather it loses its proton too. so, this option is completely wrong
C] The acids are also those which contains replaceable hydrogen ion as HCl but not boric acid and hence this option also goes wrong
D] The compounds which give up proton are called Bronsted Acid for example nitric acid. so, this option is also wrong.
Our required Ans is ‘A’ that is accepts $OH^-$ ion from water and gives proton.
Note:
Orthoboric acid or boric acid is white, needle-like crystals and have a soapy touch
It is prepared by treating concentrated sulphuric acid with borax.
On heating to high temp say 373K it gives metabolic acid.
It is used in antiseptics, in the manufacturing of enamels, food preservatives,s and in the glass industry.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Change the following sentences into negative and interrogative class 10 english CBSE
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE