H3BO3 is :- (a)Monobasic and a weak Lewis acid (b)Monobasic and a weak Bronsted acid

(B) Acetic acid turns red litmus blue but it does not affect blue litmus.

(a) : According to BronstedLowry concept, a Bronsted acid is a substance which can donate a proton to any other substance and a Bronsted base is a substance which can...

(d) : Given that pKa = 4.8 and pKb = 4.78 Therefore,  pH = 7 + 1/2 (pK a – pKb ) = 7 + 1/2 (4.80 – 4.78) = 7.01

(c) H3 PO4 is tribasic

HCl + HOH -------->  Cl- + H3O+  CH3COOH + HOH -------->  CH3COO- + H3O+  HCl is strong acid but chloride ion is a weak base similarly CH3COOH is weak acid but CH3COO-...

(b) Formic acid is stronger than acetic acid due to its chemical composition. Formic acid is an organic acid as well as active acid in an organic acid.

 P= weak base , Q=Strong acid, R=weak acid S= strong base , T= Strong acid , U=strong base

H2O =Conjugate acid -H3O+ ; Conjugate base -OH HCO3 -1 =Conjugate acid –H2O+ ; Conjugate base -OH

If (A) is correct but (R) is wrong

Acids which ionize completely in aqueous solution-strong acids. Acids which ionize partially in aqueous solution-weak acids Hydrochloric acid, nitric acid-strong acid Acetic acid, formic acid-weak acid