Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Chemistry

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?

What is the spontaneous ignition temperature of white phosphorous?

The IUPAC name for [CoCl(NO₂)(en)₂]Cl is ____________.

The following compound can be called as:

The spatial arrangement of the given molecule is denoted by:

Choose the appropriate answer(s) for the below representation from the options given

The number of asymmetric carbon atom(s) below the figure is/are

What is the most abundant organic compound on earth?

Oxime is formed by treating glucose with ____________.

Acetylation of glucose yields ____________.

Glucose does not give Schiff’s test because of the formation of cyclic ____________.

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.