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

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 ______.

The value of Henry's constant K_H is ______.

Which of the following factor(s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?

(a) nature of solute

(b) temperature

(c) pressure

(i) (a) and (c) at constant T

(ii) (a) and (b) at constant P

(iii) (b) and (c) only

(iv) (c) only

Sodium salt of benzene sulphonic acid on fusion with caustic soda gives ____________.

Which of the following will not form phenol or phenoxide?

Which of the following statements is incorrect regarding glucose?

The symbols D and L represents ____________.

Which one of the following compounds is different from the rest?

When glucose reacts with bromine water, the main product is ____________.

Glucose does not react with ____________.

Glucose reacts with acetic anhydride to form ______.