Practice MCQ Questions and answers on Chemistry-GK

Chloroform was once a widely used anesthetic. Its vapor depresses the central nervous system of a patient, allowing a doctor to perform various otherwise painful procedures. Chronic chloroform exposure can damage the liver where chloroform is metabolized to phosgene.

Insulin is an antidiabatic drug.

Tear gas, formally known as a lachrymatory agent, is a possibly lethal chemical weapon that stimulates the corneal nerves in the eyes to cause tears, pain, and even blindness. The compound 2chlorobenzalmalononitrile (chemical formula: C₁₀H₅ClN₂), is the defining component of a "tear gas" commonly referred to as CS gas, which is used as a riot control agent.

Biofertilizers such as Rhizobium, Azotobacter, Azospirilium and blue green algae (BGA) have been in use a long time. Rhizobium inoculant is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops.

An advantage of detergents over soaps is that detergents do not precipitate in hard water, unlike soap, and clothes can be easily washed with detergents in hard water.

These were sticks with one end made of potassium chlorate and the other of red phosphorus.

Alizarin or 1,2-dihydroxyanthraquinone (also known as Mordant Red 11 and Turkey Red is an organic compound with formula C₁₄ H₈ O₄ that has been used throughout history as a prominent red dye, principally for dyeing textile fabrics. Historically it was derived from the roots of plants of the madder genus. In 1869, it became the first natural pigment to be duplicated synthetically.Alizarin is the main ingredient for the manufacture of the madder lake pigments known to painters as Rose madder and Alizarin crimson. Alizarin in the most common usage of the term has a deep red colour, but the term is also part of the name for several related non-red dyes, such as Alizarine Cyanine Green and Alizarine Brilliant Blue.

Poison used for killing rats is Zinc phosphide.

In photography, silver bromide is used on photographic film, because it is unusually sensitive to light exposure.

Ethylene glycol is a chemical commonly used in many commercial and industrial applications including antifreeze and coolant. Ethylene glycol helps keep your car's engine from freezing in the winter and acts as a coolant to reduce overheating in the summer.