Chemistry Test ...

Electromagnetic radiations having λ = 310 Å are subjected to a metal sheet having work function = 12.8 eV. What will be the velocity of photoelectrons with maximum Kinetic energy.

Select the correct statement(s).

Consider the ground state of Cr atom (X = 24). The number of electrons with the azimuthal quantum numbers, ℓ = 1 and 2 are, respectively

Which of the following sets of quantum numbers is correct for an electron in 4f orbital ?

Radial probability density in the occupied orbital of a hydrogen atom in the ground state (1s) is given below

25.0 g of FeSO₄.7H₂O was dissolved in water containing dilute H₂SO₄, and the volume was made up to 1.0 L. 25.0 mL of this solution required 20 mL of an N/10 KMnO₄ solution for complete oxidation. The percentage of FeSO₄^. 7H₂O in the acid solution is

If 6.3 g of NaHCO₃ are added to 15.0 g CH₃COOH solution, the residue is found to weigh 18.0 g. What will be the mass of CO₂ released in the reaction?

Suppose the elements X and Y combine to form two compounds XY₂ and X₃Y₂. When 0.1 mole of XY₂ weighs 10 g and 0.05 mole of X₃Y₂ weighs 9 g, the atomic weights of X and Y are

Number of nitrogen atoms present in 1.4 g of N₂

The following equations are balanced atomwise and chargewise.

(i) Cr₂O₇^2- + 8H+ + 2H₂O₂ → 2Cr³+ + 7H₂O + 2O₂

(ii) Cr₂O₇^2- + 8H+ + 5H₂O₂→ 2Cr³⁺ + 9H₂O + 4O₂

(iii) Cr₂O₇^2- + 8H+ + 7H₂O₂→ 2Cr+ + 11H₂O + 5O₂

The precise equationl equations representing the oxidation of H₂O₂ is/are