CBSE 11th Standard Chemistry Subject Equilibrium Ncert Exemplar 3 Mark Questions 2021
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CBSE 11th Standard Chemistry Subject Equilibrium Ncert Exemplar 3 Mark Questions 2021
11th Standard CBSE
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Reg.No. :
Chemistry
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A reaction between ammonia and boron trifluoride is given below : NH3+BF3⟶H3N:BF3 . Identify the acid and base in this reaction. Which theory explains it? What is the hybridisation of B and N in the reactants?
(a) -
The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10–3M. what is its pH ?
(a) -
How can you predict the following stages of a reaction by comparing the value \({ K }_{ c }\) and \({ Q }_{ c }\) ?
Net reaction proceeds in the forward direction.(a) -
The ionisation constant of HF,HCOOH and HCN at 298 are 6.8 x 10-4 and 4.8 x 10 -9 respectively.Calculate the ionisation constant of the corresponding conjucate bases.
To find Kb of a conjugate base , use the formula Ka.Kb = Kw = 1 x 10-14 Conjugate bases of HF,HCOOH and HCN are F- HCOO- and CN- respectively.(a)
