Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Differentiate between “minerals” and “ores”.

Write the formula for the following coordination compound:

Iron (III) hexacyanoferrate (II)

Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor, Why?

With reference to which classification has the statement, ‘ranitidine is an antacid” been given?

Why do we need to classify drugs in different ways?

Explain the term target molecules or drug targets as used in medicinal chemistry.

Why should not medicines be taken without consulting doctors?

Define the term chemotherapy.

Arrange the following compound groups in the increasing order of their property indicated :

p-nitrophenol, ethanol, phenol (acidic character)

Arrange the following compound groups in the increasing order of their property indicated :

Propanol, Propane, Propanal (boiling point)

Define the following : Narrow spectrum antibiotics

Based on the nature of intermolecular forces, classify the following solids:

Sodium sulphate, Hydrogen

Why does copper obtained in the extraction from copper pyrites have a blistered appearance?

Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions. Why?

What is 'copper matte' ?

Which of the following is a more stable complex and why ?

 Write the reaction that occurs at anode on electrolysis of concentrated 2 4 H SO using platinum electrodes. 

How will you convert the following:
[Ag(CN)₂]⁻ to Ag

Electrochemistry deals with the production of electricity from ____________.

The substance that gets adsorbed on the surface of the solid is called ____________.