The most difficult gases riddlesChemistry quiz
Are gas fittings tightened clockwise or anti-clockwise?
it depends on the gas
there is no standard
Some gas fittings use reverse threads to prevent disastrous misconnections. For example, oxygen fittings are right-handed, but acetylene and other flammable gases use left-handed fittings.
Who coined the term "gas"?
Cornelis van Niel
Julius von Mayer
Jan van Helmont
Jan Baptist van Helmont (1580–1644) was a Flemish chemist, physiologist, and physician. He worked during the years just after Paracelsus and the rise of iatrochemistry, and is sometimes considered to be "the founder of pneumatic chemistry". Van Helmont is remembered today largely for his ideas on spontaneous generation, his 5-year tree experiment, and his introduction of the word "gas" (from the Greek word chaos) into the vocabulary of science.
Which gas is colorless and odorless?
Methane is the main component of natural gas piped into homes for domestic heating and cooking purposes. In order to assist in detecting leaks, a sulphur-like odorant is added the gas used by consumers.
What is inside Swiss cheese holes?
Carbon dioxide is produced by bacteria feeding on the lactic acid. In the Middle Ages, the holes were considered a sign of imperfection and cheese makers would try to avoid them.
What is the chemical symbol of helium?
H is the chemical symbol of hydrogen. Hg is the chemical symbol of Mercury.