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

Write the electronic configurations of the given ions H^–.

Write the electronic configurations of the given ions Na⁺.

Write the electronic configurations of the given ions O^2–.

Write the electronic configurations of the given ions F^–.

What is the lowest value of n that allows g orbitals to exist?

An Atom of an Element Contains 29 Electrons and 35 Neutrons. Deduce

(i) the Number of Protons and

(ii) the Electronic Configuration of the Element.

Give the number of electrons in the species `"H"_2^+`, H₂ and `"O"_2^+`

A certain particle carries 2.5 × 10^-16 C of static electric charge. Calculate the number of electrons present in it.

How will you convert benzene into p-nitrobromobenzene?

How would you convert the following compound into benzene?

Ethyne

How would you convert the following compound into benzene?

Ethene

How would you convert the following compound into benzene?

Hexane

Give a brief description of the principle of the following technique taking an example.

Chromatography

Explain the principle of paper chromatography.

The best and latest technique for isolation, purification and separation of organic compounds is ______.

Ionic product of water at 310 K is 2.7 × 10^–14. What is the pH of neutral water at this temperature?

The concentration of sulphide ion in 0.1M HCl solution saturated with hydrogen sulphide is 1.0 × 10^–19 M. If 10 mL of this is added to 5 mL of 0.04 M solution of the following: FeSO₄, MnCl₂, ZnCl₂ and CdCl₂. in which of these solutions precipitation will take place?

For the electrons of oxygen atom, which of the following statements is correct?

Give reasons for the following:

Water molecule has bent structure whereas carbon dioxide molecule is linear.

Group the following as linear and non-linear molecules:

\[\ce{H2O, HOCl, BeCl2, Cl2O}\]