Astudent is heating a chemical in a beaker with a bunsen burner. identify the safety equipment that should be used and the purpose of it for the given scenario.

Lab coate

Goggles

Gloves

Fire extinguisher

Fire proof mat

Wire gauge

Explanation:

The safety equipment to be used are

a) Lab coat: for body safety

b) Goggles: For eye safety

c) Gloves : For hand safety.

d) Fire extinguisher , in case of any accident.

e) fire proof mat

f) wire gauge over tripod placed for beaker.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.