Daily NEET MCQ- March 8, 2022 - NEET MCQ

Every material that goes to trash is known as solid waste. It may be any garbage, refuse, that may include any solid, liquid, semi-solid, or contained gaseous material that is obtained from any industrial, commercial, or community activities.

The wastes from homes, hospitals, offices, schools, stores, etc., that includes food wastes, glass, metals, leather, paper, plastics, rubber, textile, yard wastes, toxic waste, biomedical waste, etc. that is collected and disposed of by the municipality is called municipality solid waste. This waste varies with the municipality.

The sanitary landfill is an engineered method of controlled disposal where waste is isolated from the environment until it is safe. It is a substitute for open-burning dumps containing degradable, semi-degradable, and non-biodegradable waste.

Histamine is the compound which is responsible for the secretion of pepsin and HCl in the stomach. Drugs like cimetidine (Tegamet), ranitidine (Zantac), omeprazole and lansoprazole prevent the interaction of histamine with the stomach wall receptors, resulting in release of lesser acid.

All can be used as antacids. But when NaHCO₃ (and other hydrogen carbonates) are taken in excess, it increases the alkalinity of the stomach and stimulates the release to more acid to counter it. Metal hydroxides are better as they are insoluble and do not increase the pH above 7.

Benadryl, Dimetapp and Seldane are examples or antihistamines which are drugs that interfere with the main actions of histamine, which is a vasodilator and is released during allergic reactions. Nardil is an antidepressant drug.

Analgesics, antipyretics and barbiturates (tranquilizers) are drugs that interfere with the message transfer mechanism from the nerve to receptor and hence block neurological communication.

Initial range, r = √2Rh.
When the height of the antenna is doubled,
r’ = √2R × 2h = √2r.

The ozone layer is present in the stratosphere. The ozone layer blocks the harmful ultraviolet radiation from reaching us. For this ultraviolet radiation, the wavelength is considered to be 3 × 10^-7 m.

Skywave propagation is useful for radio-waves of frequencies ranging from 2 MHz to 30 MHz. Higher frequencies than this value cannot be reflected by the ionosphere. All the other statements are correct.