#1 Air contains maximum amount of
By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
#2 Washing soda is ?
Washing soda, aka sodium carbonate (or soda ash), is a natural cleaner and a powerful water softener. It’s very basic with a pH of 11. The Environmental Working Group gives it an “A” on their scale, so it passes with flying colors, making it safe and non-toxic.
#3 Natural rubber is a polymer derived from ?
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree. Natural rubber is from the monomer isoprene (2-methyl-1,3-butadiene), which is a conjugated diene hydrocarbon as mentioned above.
#4 The chemical used as a fixer in photography is ?
Fixation is commonly achieved by treating the film or paper with a solution of thiosulfate salt. Popular salts are sodium thiosulfate—commonly called hypo—and ammonium thiosulfate—commonly used in modern rapid fixer formulae. Fixation involves these chemical reactions (X = halide, typically Br−):
#5 Water drops are spherical because of ?
Surface tension is responsible for the shape of liquid droplets. Although easily deformed, droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer. In the absence of other forces, including gravity, drops of virtually all liquids would be approximately spherical.