Question

The ground state energy of hydrogen atom is Ð 13.6 eV. Consider an electronic state _ of He_ whose energy, azumuthal quantum number and magnetic quantum number are -3.4 eV, 2 and 0, respectively. Which of the following statement(s) is(are) true for the state _ ?
A. It is a 4d state
B. It has 2 angular nodes
C. It has 3 radial nodes
D. The nuclear charge experienced by the electron in this state is less than 2e, where e is the magnitude of the electronic charge

Answer 1

Explanation:

With reference to aqua regia, choose the correct option(s)

A. The yellow colour of aqua regia is due to the presence of NOCl and Cl_

B. Aqua regia is prepared by mixing conc. HCl and conc. HNO_ in 3 : 1 (v/v) ratio

C. Reaction of gold with aqua regia produces an anion having Au in +3 oxidation state

D. Reaction of gold with aqua regia produces NO_ in the absence of air

Answer 2

Answer:

option D: the nuclear charge experienced by the electron in this state is less than 2e where e is the magnitude of the electronic charge