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

Write the name of gas released when Cu is added to dilute HNO₃

Write the name of gas released when Cu is added to the conc. HNO₃ 

Answer the following question.
Write the disproportionation reaction of H₃PO₃. 

State Henry’s law.

Why type of drug is used in sleeping pills?

Why phenol undergoes electrophilic substitution more easily than benzene?

What is Lanthanoid contraction?

What is the total number of atoms per unit cell in a face-centered cubic structure?

The number of atoms per unit cell in a body centered cubic structure is ____________.

An atom located at the body center of a cubic unit cell is shared by ____________.

Volume of unit cell occupied in face-centered cubic arrangement is ____________.

TiCl has the structure of CsCl. The coordination number of the ions in TiCl is ____________.

An element forms a cubic unit cell with edge length 405 pm. Molar mass of this element is 2.7 × 10⁻² kg/mol and its density is given as 2.7 × 10³ kg/m³. How many atoms of these elements are present per unit cell?

A substance forms face-centered cubic crystals. Its density is 1.984 g/cm³ and the length of the edge of the unit cell is 630 pm. Calculate the molar mass in g/mol?

A metal has a body-centered cubic crystal structure. The density of the metal is 5.96 g/cm³. Find the volume of the unit cell if the atomic mass of metal is 50.

Which law shows relation between pressure and solubility of a gas in solvent?

Relationship between equilibrium constant of the reaction and standard electrode potential of electrochemical cell in which that reaction takes place is ____________.

The common impurity present in most of the ores is ____________.

Which allotrope of phosphorous is most stable?

At what temperature white phosphorus changes to red phosphorus?