Chemistry
Get insights from 6.9k questions on Chemistry, answered by students, alumni, and experts. You may also ask and answer any question you like about Chemistry
Follow Ask QuestionQuestions
Discussions
Active Users
Followers
New answer posted
a year agoContributor-Level 10
Carbon monoxide (CO), sulphur dioxide (SO2) and oxides of nitrogen (NO2).
New answer posted
a year agoContributor-Level 10
Green chemistry can be applied as mentioned in the following examples:
(i) In dry-cleaning, the use of liquefied CO2 in place of tetrachloroethene.
(ii) In the bleaching of paper using hydrogen peroxide instead of chlorine.
(iii) In the manufacture of chemicals like ethanol, using environment-friendly chemicals and conditions.
New answer posted
a year agoContributor-Level 10
PCBs are polychlorinated biphenyls. They are contaminants of water. They are used as fluids in transformers and capacitors.
New question posted
a year agoNew answer posted
a year agoContributor-Level 10
3.33. In the modern periodic table, each period begins with the filling of a new shell. Therefore, the period indicates the value of principal quantum number. Thus, option (c) is correct.
New question posted
a year agoNew answer posted
a year agoContributor-Level 10
3.32. (a) LiO2 (Lithium oxide)
(b) Mg3N2 (Magnesium nitride)
(c) AlI3 (Aluminium iodide)
(d) SiO2 (Silicon dioxide)
(e) Phosphorous pentafluoride (f) Z = 71
(f) The element is Lutenium (Lu). Electronic configuration [Xe] 4 f7 5d1 6s2.
With fluorine it will form a binary compound = LuF3.
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 67k Colleges
- 1.2k Exams
- 718k Reviews
- 1850k Answers