In which of the following reactions H2O2 acts as a reducing agent? 1. H2O2 + 2H+ + 2e- $$\to$$ 2H2O 2. H2O2 - 2e- $$\to$$ O2 + 2H+ 3. H2O2 + 2e- $$\to$$ 2OH- 4. H2O2 + 2OH- - 2e- $$\to$$ O2 + 2H2O

Among the following oxoacids, the correct decreasing order of acid strength is :

Which one of the following properties is not shown by NO?

The correct statement for the molecule, CsI3 is :

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :

For the estimation of nitrogen, 1.4 g of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 ml of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:

For complete combustion of ethanol, C2H5OH(l) + 3O2(g) $$\to$$ 2CO2(g) + 3H2O(l) the amount of heat produced as measured in bomb calorimeter, is 1364.47 kJ mol–1 at 25oC. Assuming ideality the Enthalpy of combustion, $${\Delta }_{C}H$$, for the reaction will be : (R = 8.314 kJ mol–1)

Sodium phenoxide when heated with $$C{O}_2$$ under pressure at $$125^{\circ }C$$ yields a product which on acetylation products $$C.$$ The major product $$C$$ would be

In the reaction, the product C is:

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is:

Consider separate solutions of 0.500 M C2H5OH(aq), 0.100 M Mg3(PO4)2(aq), 0.250 M KBr(aq) and 0.125 M Na3PO4(aq) at 25oC. Which statement is true about these solutions, assuming all salts to be strong electrolytes?

For the reaction SO2 (g) + {1 \over 2} O_2(g) \leftrightharpoons SO3(g). if KP = KC(RT)x where the symbols have usual meaning then the value of x is: (assuming ideality)

On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is:

Considering the basic strength of amines in aqueous solution, which one has the smallest pKb value?

The equivalent conductance of NaCl at concentration C and at infinite dilution are $${\lambda }_C$$ and $${\lambda }_{\infty }$$, respectively. The correct relationship between $${\lambda }_C$$ and $${\lambda }_{\infty }$$ is given as: (where the constant B is positive)

Resistance of 0.2 M solution of an electrolyte is 50 $$\Omega$$. The specific conductance of the solution is 1.4 S m-1. The resistance of 0.5 M solution of the same electrolyte is 280 $$\Omega$$. The molar conductivity of 0.5 M solution of the electrolyte in S m2 mol-1 is :

Given below are the half-cell reactions: Mn2+ + 2e- $$\to$$ Mn; Eo = -1.18 V 2(Mn3+ + e- $$\to$$ Mn2+); Eo = +1.51 V The Eo for 3Mn2+ $$\to$$ Mn + 2Mn3+ will be :

Which one is classified as a condensation polymer?

Which series of reactions correctly represents chemical relations related to iron and its compound?

Which one of the following bases is not present in DNA?