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Physical Chemistry
What is n-factor of H2O2 in alkaline medium a/c to the reaction:-
H2O2 + 2 OH- ---> 2 H2O + O2 + 2e-
H2O2 + 2 OH- ---> 2 H2O + O2 + 2e-
Physical Chemistry
The first aid given to a person that ingested poisonous chemical in the laboratory include all these EXCEPT ----------------.
cold water to drink
Cold milk to drink
inducing vomiting
seek emergency medical assistance
cold water to drink
Cold milk to drink
inducing vomiting
seek emergency medical assistance
Physical Chemistry
25 ml of a solution containing NaOH and Na2CO3 required
(1) 50 ml of 0.2 HCl using phenolphthalein as indicator.
(2) 72 ml of 0.2 N HCl using methyl orange as indicator.
The ratio of weight of NaOH and Na2CO3 in the solution is
Answer provided was 0.48
(1) 50 ml of 0.2 HCl using phenolphthalein as indicator.
(2) 72 ml of 0.2 N HCl using methyl orange as indicator.
The ratio of weight of NaOH and Na2CO3 in the solution is
Answer provided was 0.48
Physical Chemistry
200 ml of colloidal solution is completely coagulated by addition of 10 ml 0.5 M KCl coagulation value of KCl is?
Physical Chemistry
At 400K the energy of activation of a reaction is decreased by 0.4 Kcal in the presence of a catalyst hence rate will be? and how?
(1) Increased by 1.65 times
(2) Increased by 2.73 times
(3) Decreased by 1.18 times
(4) Decreased by 1.7 times
(1) Increased by 1.65 times
(2) Increased by 2.73 times
(3) Decreased by 1.18 times
(4) Decreased by 1.7 times
Physical Chemistry
The enthalpies of the combustion of C2H4 (g) and C2H6 (g) are -1440 and -1560 kJ/mol respectively at a temperature at which volume per mol of the gas is 22.4 L. The percentage composition of ethene C2H4 (g) in 20 L mixture which on combustion releases 1340 kJ of heat:
Physical Chemistry
At 1000 K, from the data :
N2 (g) + 3H2 (g) ----> 2NH3 (g).......H = -86.2 kJ/mol
Cp/R ratios of N2, H2 and NH3 are 3.5, 3.5 and 4 respectively. Heat of formation of NH3 at 300 K is?
N2 (g) + 3H2 (g) ----> 2NH3 (g).......H = -86.2 kJ/mol
Cp/R ratios of N2, H2 and NH3 are 3.5, 3.5 and 4 respectively. Heat of formation of NH3 at 300 K is?
Physical Chemistry
l is a organic compound which has 12.8% C,2.14% N,85.1 % Br percentage of the weight . The molar mass of the compound is 188.what is the formula of the compound ?
Physical Chemistry
At 25 degree celcius λ( 0)H+=3.498*10^-2 and λ(0) 0H- =1.98*10^-2 Sm2mol-1.given specific conductance of water(kappa) is =5.7*10^-6 Sm-1.calculate Kw of water.
Physical Chemistry
a sample of lead weighing 1.05g was dissolved in a small quantity of nitric acid to produce aqueous solution of Pb2+ and Ag+(which is present as impurity).the volume of the solution was increased to 300ml by adding water, a pure silver electrode was immersed in the solution and the potential difference between this electrode and the standered electrode was found to be 0.503V at 25 degree celcius.what was the %of Ag in the lead metal?Given E0 (Ag+/Ag)=0.799v.neglecting amount of Ag+ converted to Ag.
