Chemistry - Study Mode

[#451] The ore of Aluminium is
Correct Answer

(B) Bauxite

Explanation

Solution: Of all the aluminium ores, bauxite is the chief ore of aluminium.

[#452] The chemical used for cloud seeding for artificial rains is
Correct Answer

(C) Silver Iodide

Explanation

Solution: The most common chemicals used for cloud seeding include silver iodide, potassium iodide and dry ice (solid carbon dioxide) and Liquid propane. These salt particles act as a core (cloud condensation nuclei or ice-nucleating particles) which draw water vapour within the cloud towards them.

[#453] Which of the following is used as anesthetic ?
Correct Answer

(B) N2O

Explanation

Solution: Nitrous oxide (N2O), commonly known as laughing gas or happy gas, is the most commonly used inhalation anesthetic in dentistry and is commonly used in emergency centers and ambulatory surgery centers as well. It is an inorganic inhalation agent that is colorless, odorless to sweet-smelling, and nonirritating to the tissues.

[#454] Aspirin is chemically known as
Correct Answer

(C) Acetylsalicylic acid

Explanation

Solution: One of the best known aromatic acetates is acetylsalicylic acid, or aspirin, which is prepared by the esterification of the phenolic hydroxyl group of salicylic acid. Aspirin possesses a number of properties that make it the most often recommended drug.

[#455] Gypsum is used for improvement of:
Correct Answer

(B) Saline soils

Explanation

Solution: Gypsum is calcium sulfate which is essential to the sustainability of most irrigated soils. Irrigated land eventually leads to sodicity and salinity unless extreme care is taken. It improves sodic (saline) soils by removing sodium from the soil and replacing it with calcium.