Science (English Medium) कक्षा ११ - CBSE Question Bank Solutions for Chemistry

Suggest a route for the preparation of nitrobenzene starting from acetylene?

Match the following reactants in Column I with the corresponding reaction products in Column II.

Which atom is indicated by the following configuration?

[He] 2s¹

Which atom is indicated by the following configuration?

[Ne] 3s² 3p³

Which atom is indicated by the following configuration? 

[Ar] 4s² 3d¹.

An atomic orbital has n = 3. What are the possible values of l and m_l?

List the quantum numbers (m_l and l) of electrons for 3d orbital.

 Which of the following orbitals are possible?

1p, 2s, 2p and 3f

Indicate the number of unpaired electrons in a P.

Indicate the number of unpaired electrons in Si.

Indicate the number of unpaired electrons in Cr.

Indicate the number of unpaired electrons in Fe.

Indicate the number of unpaired electrons in Kr.

Write the important conditions required for the linear combination of atomic orbitals to form molecular orbitals.

Discuss the chemistry of Lassaigne’s test.

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10^–3 M. what is its pH?

The pH of a sample of vinegar is 3.76. Calculate the concentration of hydrogen ion in it.

It has been found that the pH of a 0.01M solution of an organic acid is 4.15. Calculate the concentration of the anion, the ionization constant of the acid and its pK_a.

Assuming complete dissociation, calculate the pH of the following solution:

0.003 M HCl