Answer
Verified
398.1k+ 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
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What organs are located on the left side of your body class 11 biology CBSE
Write an application to the principal requesting five class 10 english CBSE
What is the type of food and mode of feeding of the class 11 biology CBSE
Name 10 Living and Non living things class 9 biology CBSE