The correct set of four quantum numbers for the valence electrons fo rubidium atom (Z = 37) is

• 5,0,0, +1/2

• 5,1,0,6+1/2

• 5,1,1,+1/2

• 5,1,1,+1/2

If Z is a compressibility factor, Vander Waal's equation at low pressure can be written as 

For the complete combustion of ethanol, C₂H₅OH (l) + 3O₂ (g) → 2CO₂ (g) + 3H₂O (l), the amount of heat produced as measured in a bomb calorimeter, is 1364.47 kJ mol-1 at 25^oC. Assuming ideality the enthalpy of combustion, ∆_CH, for the reaction will be (R = 8.314 JK^-1 mol^-1)

• -1366.95 kJ mol^-1

• -1361.95 kJ mol^-1

• -1460.50 kJ mol^-1

• -1460.50 kJ mol^-1

For the reaction,


if K_p = K_c (RT)^x where the symbol has usual meaning then the value of x is (assuming ideality)

• -1

• -1/2

• 1/2

• 1/2

In which of the following reactions H₂O₂ acts as a reducing agent?
I. H₂O₂ + 2H⁺ + 2e^- →2H₂O
II. H₂O₂ - 2e^- →O₂ + 2H⁺
III. H₂O₂ +2e^-→ 2OH^-
IV. H₂O₂+ 2OH^- -2e^- →O₂ + 2H₂O

• I and II

• III and IV

• I and III

• I and III

The correct statement for the molecule, CsI₃ is 

• It is a covalent molecules

• It contains Cs⁺ and I₃^-

• It contains Cs³⁺ and I^- ions

• It contains Cs³⁺ and I^- ions

For which of the following molecule significant μ≠ 0?

• only a

• a and b

• Only c

• Only c

For the estimation of nitrogen 1.4g of an organic compound was digested by Kjeldahl's 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 neutralisation. The percentage of nitrogen in the compound is 

• 6%

• 10%

• 3%

• 3%

The resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution of 0.5 M solution of the same electrolyte is 1.4 S m^-1 and resistance of the same solution of the same electrolyte is 280 Ω. The molar conductivity of 0.5 M solution of the electrolyte in Sm^-2 mol^-1 is

• 5 x 10^-4

• 5 x 10^-3

• 5 x 10³

• 5 x 10³

The equivalent conductance of NaCl at concentration C at infinite dilution are λ_C and λ_∞ respectively. The correct relationship between λ_C and λ_∞  is given as (where the constant B is positive)

• λ_C = λ_∞ +(B)C

• λ_C = λ_∞ -(B)C

• λ_C = λ_∞ -(B)

• λ_C = λ_∞ -(B)