Four species: H2O HCO3 -1 HSO4 -1 and NH3 can act as both Bronsted acids and bases.

(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) : HSO3 F is the super acid. Its acidic strength is greater than any given species. The pKa value of other species are given below : HCO3– →10.25 H3 O+ →...

CO2 molecule has only two bonds which lie farthest to each other to minimise repulsion, making an angle of 180°.  H2O, on the other hand, has a lone pair. As lone...

 (i) C2H2(180) > BF3(120)>CH4 (109.28)>NH3(107) > H2O(104.5)   (ii) NH4 + > NH3 >NH2 - ,

F- ,HSO4 - ,CO3 2- and NH3

NH2- , NH3 and HCOO-

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

 NH3(g) = Lewis base, CH3COOH(aq)= Arrhenius acid , CO2(g), BF3 ,Ag+ = Lewis acid and HCO3 -1 is a Bronsted acid.

(a) If both A & R are correct and R is the correct explanation of the assertion.

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