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Which of the following are the colloidal materials present in domestic sewage?

ACalcium

BSand

CAmmonia

DFecal matter

Answer:

D. Fecal matter

Read Explanation:

  • The substances that do not readily dissolve in water but also are not settled down are known as colloidal substances.

  • They may be filtered out in a Gooch Crucible and contains fecal matter, bacteria, cloth, and paper fibers.


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ഓസോൺ പാളിയെ കുറിച്ച് താഴെ തന്നിരിക്കുന്ന പ്രസ്താവനകളിൽ ശരിയായത്ഏത്?

1.ഓസോൺ പാളിയുടെ സാന്ദ്രത അളക്കുന്ന യൂണിറ്റ്  ഡോബ്‌സൺ ആണ്.

2.300 ഡോബ്സൺ യൂണിറ്റാണ് സാധാരണഗതിയിൽ ഒരു പ്രദേശത്തെ ഓസോൺ പാളിയുടെ സാന്ദ്രത.