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

What is the spontaneous ignition temperature of white phosphorous?

The f-block elements are known as ____________.

Ozonolysis of alkenes followed by the reaction with zinc dust and water gives ____________ depending on the substitution pattern of the alkene.

Esters react with DIBAL-H to produce:

Aldehydes are produced on reduction of the following by DIBAL-H:

The oxidation of toluene to benzoic acid can be stopped at the aldehyde stage to give benzaldehyde. The reagent used for the purpose is one of the following.

Aldehydes are prepared by reducing nitriles to corresponding imines with stannous chloride in the presence of hydrochloric acid. This reaction is called:

The oxidation of toluene to benzoic acid can be done using which of the following reagents.

The cyclic form of fructose is called __________.

An element (atomic mass 100 g/mol) having bcc structure has unit cell edge 400 pm. The density of element is (No. of atoms in bcc, Z = 2).

Gold has a face-centered cubic lattice with an edge length of the unit cube of 407 pm. Assuming the closest packing, the diameter of the gold atom is ____________.

Sodium metal crystallises in a body-centred cubic lattice with a unit cell edge of 4.29 Å. The radius of the sodium atom is approximately ______.

The empty space in the body-centered cubic lattice is ____________.

The number of atoms contained in a fcc unit cell of a monoatomic substance is ____________.

Which of the following metal(s) show(s) hexagonal close-packed structure (hcp) and which show face-centered cubic (fcc) structure?

The statement “If 0.003 moles of a gas are dissolved in 900 g of water under a pressure of 1 atmosphere, 0.006 moles will be dissolved under a pressure of 2 atmospheres”, illustrates.

According to Henry’s law, the amount of gas that will dissolve in blood plasma or any other liquid is determined by which of these factors?

Henry’s law constant of oxygen is 1.4 × 10^–3 mol lit^–1 atm^–1 at 298 K. How much of oxygen is dissolved in 100 ml at 298 K when the partial pressure of oxygen is 0.5 atm?

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to ______.

Value of Henry's constant K_H ______.