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

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

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

0.005 M NaOH 

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

0.002 M HBr

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

0.002 M KOH

Calculate the pH of the following solution: 

2 g of TlOH dissolved in water to give 2 litre of solution.

Calculate the pH of the following solutions:

0.3 g of Ca(OH)₂ dissolved in water to give 500 mL of solution.

Calculate the pH of the following solution:  

0.3 g of NaOH dissolved in water to give 200 mL of solution.

Calculate the pH of the following solution:

1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.

The degree of ionization of a 0.1M bromoacetic acid solution is 0.132. Calculate the pH of the solution and the pK_a of bromoacetic acid.

The pH of 0.005M codeine (C₁₈H₂₁NO₃) solution is 9.95. Calculate its ionization constant and pK_b.

The pH of milk, black coffee, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.

If 0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. Calculate the concentrations of potassium, hydrogen and hydroxyl ions. What is its pH?

The solubility of Sr(OH)₂ at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.