📚NCERT Questions — CBSE11

What is the most common oxidation number of hydrogen in its compounds?

In a polyatomic ion like (CO3)2-, what must the algebraic sum of the oxidation numbers of its atoms equal?

How many electrons will be present in the subshells having m_s value of -1/2 for n=4?

What does the term 'redox' signify in chemical reactions?

Using s, p, d, f notations, describe the orbital with quantum numbers n=4, l=2.

For which of the following reactions is Kp = Kc?

For the reaction N2(g) + 3H2(g) <=> 2NH3(g), if at equilibrium [N2] = 1.5 x 10^-2 M, [H2] = 3.0 x 10^-2 M, and [NH3] = 1.2 x 10^-2 M, what is the value of Kc?

Indicate the number of unpaired electrons in Fe (Z=26).

What is the current symbol used for unified mass, replacing 'amu'?

For hydrogen-like species (e.g., He⁺, Li²⁺), the energy of an electron in the n-th orbit is given by E_n = -R_H(Z²/n²). What happens to the energy value as the atomic number (Z) increases?