C6H5NH2+CHCI3 + KOH =A Covalence of C and N in the functional group of ‘A’ is 1) 4,3 2) 3,4 3) 4, 4 4) 3, 3
Correct answer :(2)
100 mL of 1 M HCl, 200 mL of 2 M HCl and 300 mL of 3 M HCl are mixed. The molarity of the resulting solution is 1) 1 M 2) 2.66 M 3) 2.33 M 4) 4.25 M
When the solutions of HCl with different concentrations and different volumes are mixed, The resultant concentration of solution can be calculated in the following way.. The solution of this problem is based on the rule of dilution. A solution of molarity M1 and volume V1 is diluted to V2 and of molarity M2, then, the […]
Calculate the pH of an aqueous solution of 1.0M ammonium formate assuming complete dissociation. ([ pK_a ] of formic acid = 3.8, [ pK_b ] of ammonia = 4.8)
The hydrolysis reaction is a reversible reaction.The process of hydrolysis is a reverse reaction of neutralization. hydrolysis constant (𝐾ℎ):The equilibrium constant for the hydrolysis reaction multiplied by concentration of water is known as hydrolysis constant. it is represented by Kh. degree of hydrolysis (h): The fraction of the total salt which is hydrolysed it […]
Question : Which pair will show common ion effect? 1) AgNO₃ + KNO₃ 2) NaCl + HCl 3) NH₄OH + NH₄Cl 4) BaCl₂ + Ba(NO₃)₂
Correct answer: 3 A mixture of NH₄OH (ammonium hydroxide) and NH₄Cl (ammonium chloride) forms a basic buffer solution. It contains a weak base and a salt of its strong conjugate acid. It is widely used in qualitative inorganic analysis. Buffer Solutions: The solution which resists the change in its pH when some […]
The pH of a solution obtained by mixing 50 mL of 0.4 N HCl and 50 mL of 0.2 N NaOH is 1)–log 2 2)–log 0.2 3)1.0 4)2.0
Correct answer:(3) * The final pH depends on the difference in milliequivalents of acid and base present in the mixed solution…
A 0.01 M ammonia solution is 5% ionized, the concentration of OH⁻ ions is 1) 0.005 M 2) 0.0001 M 3) 0.0005 M 4) 0.05 M
Degree of dissociation is defined as the ratio of number of molecules dissociated as ions to total number of molecules of electrolyte dissolved. Degree of association of strong electrolytes is unity(1). But,for weak electrolytes is less than Unity. The extent of dissociation for weak electrolytes increases upon the dilution.
The equilibrium constant for the reaction A ⇌ B is K. The equilibrium constant for the reaction mA ⇌ mB is 1) mK 2)K/m 3) Kᵐ 4) K⁻ᵐ
Equilibrium constant depends on, 1. Temperature 2)Stoichiometric Coefficient 3) direction of reaction.. 1. Temperature : * For an exothermic reaction ( H < 0), equilibrium constant is inversly proportional to temperature. Increasing temperature decreases Kcd. Decreasing the temperature increases Kc. * For an endothermic reaction ( H > 0). Equilibrium constant is directly proportional to […]
Question : The Kₐ of a weak acid is 10⁻⁵, pKb value of its conjugate base is 1)7 2)5 3)9 4)6
Video solution: dissociation constant of acid (Ka) : It is a measure of the extent to which an acid dissociates in solution. The less an acid dissociates, the smaller the value of Ka. The stronger the acid, higher will be the value of Ka. What is a Conjugate Acid-Base Pair? Every […]