NCERT 2022 | जीव जगत का वर्गीकरण - L5 | Biological Classification | Hindi Medium | Pooja Ma'm |10 AM

Calculate the pH at which the following reaction will be at equilibrium in basic medium : A_(2)(s) hArr A^(-)(aq) +AO_(3)^(-) (aq) When the equilibrium concentration at 300 K are: [A^(-)] = 0.1M, [AO_(3)^(-)] = 0.1M Given: DeltaG_(f)^(@) of OH^(-)(aq) =- 150 kJ//"mole" , DeltaG_(f)^(@) "of" H_(2)O(l) =- 233 kJ//"mole" DeltaG_(f)^(@) "of" A^(-)(aq) =- 50 kJ//"mole" , DeltaG_(f)^(@) "of" AO_(3)^(-) (aq) =- 123.5 kJ//"mole" , R = (25)/(3) J "mole"^(-1) K^(-1), log_(e) 10 = 2.3

Ashok left from place A for place B at 8 a.m. and Rahul left place B for place A at 10.00 a.m. the dis-tance between place A and B is 637 km. If Ashok and Rahul are travelling at a uniform speed of 39kmph. and 47 kmph respectively, at what time wilt they meet? 5: 30 b. 4: 30 c. 5 p m d. 4 p m

A secondary alkyl halide (A) hydrolyzes with alkali (B) in aqueous medium ismultaneously via S_(N)1 and S_(N)2 pathways with rate constants k_(1) and k_(2) , respectively. form kinetic data, it was found that a plot of = (-1)/([A])(d[A])/(dt) vs [B] is straight line with a slope equal to 2.7 xx 10^(-4) L mol^(-1) min^(-1) and intercept equal to 1.02 xx 10^(-3) . Minimum initial concentration of [A] = 0.2 M and [B] , i.e., [overset(ɵ)(OH)] = 0.5 M . The initial rate of consumption is isopropyl chloride (in M min^(-1)) is