Practice MCQ Questions and answers on Chemistry-GK

The extent to which an electrolyte dissociates into ions is known as degree of dissociation or ionization and depends upon the following factors:
(1) Nature of the electrolyte,
(2) Temperature,
(3) Dilution,
(4) nature of the solvent, and
(5) presence of other ions.

Gold plating is a method of depositing a thin layer of gold onto the surface of another metal, most often copper or silver (to make silver-gilt), by chemical or electrochemical plating. Electroplating of gold is done using a sulphate/sulphite based electrolyte. This product is environment- and user friendly and moreover the electroplating rate is good.

Corrosion can be defined as the deterioration of materials by chemical processes.

Aqueous solution of ammonium acetate is a good conductor of electricity.

The electrodes of the cells in a lead storage battery consist of lead grids. The openings of the anodic grid is filled with spongy (porous) Pb lead. The openings of the cathodic grid is filled with lead dioxide PbO₂.

Discharging the stored energy relies on both the positive and negative plates becoming lead(II) sulphate and the electrolyte losing much of its dissolved sulfuric acid. Hence, sulphuric acid is consumed.

A rechargeable battery, storage battery, or accumulator is a type of electrical battery. It comprises one or more electrochemical cells, and is a type of energy accumulator. It is known as a secondary cell because its electrochemical reactions are electrically reversible. Rechargeable batteries come in many different shapes and sizes, ranging from button cells to megawatt systems connected to stabilize an electrical distribution network. Several different combinations of chemicals are commonly used, including: lead–acid, nickel cadmium (NiCd), nickel metal hydride (NiMH), lithium ion (Li-ion), and lithium ion polymer (Li-ion polymer). Rechargeable batteries have lower total cost of use and environmental impact than disposable batteries. Some rechargeable battery types are available in the same sizes as disposable types. Rechargeable batteries have higher initial cost, but can be recharged very cheaply and used many times.

In a Carbonyl group a carbon atom makes double bond with oxygen.

This is the most important industrial and laboratory method and may be used for preparing simple as well as mixed ethers.

German Silver is an alloy of copper, zinc, and nickel, sometimes also containing lead and tin. It does not contain silver metal and is extensively used because of its hardness and resistance to corrosion.