NH42-IN
NH4 or NH 4 or NH-4 may refer to: * Ammonium, the cation NH4+ in chemistry * National Highway 4 (India), new numbering for a National Highway in India * National Highway 4 (India, old numbering), a major National Highway in western and southern India * New Hampshire Route 4 New Hampshire Route 4 (NH 4) is a state highway located in eastern Strafford County, New Hampshire. Its western terminus is at an intersection with New Hampshire Route 9 and New Hampshire Route 108 in Dover. Its northern terminus is at the Ma ...

Ammonium
The ammonium cation is a positively-charged polyatomic ion with the chemical formula or . It is formed by the protonation of ammonia (). Ammonium is also a general name for positively charged or protonated substituted amines and quaternary ammonium cations (), where one or more hydrogen atoms are replaced by organic groups (indicated by R). Acid–base properties The ammonium ion is generated when ammonia, a weak base, reacts with Brønsted acids (proton donors): :H+ + NH3 -> H4 The ammonium ion is mildly acidic, reacting with Brønsted bases to return to the uncharged ammonia molecule: : H4 + B- -> HB + NH3 Thus, treatment of concentrated solutions of ammonium salts with strong base gives ammonia. When ammonia is dissolved in water, a tiny amount of it converts to ammonium ions: :H2O + NH3 OH- + H4 The degree to which ammonia forms the ammonium ion depends on the pH of the solution. If the pH is low, the equilibrium shifts to the right: more ammonia molecules are co ...
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National Highway 4 (India)
National Highway 4, or NH 4, is the major highway in the Indian union territory of Andaman and Nicobar Islands. It is 230.7 km in length. This road running from the capital city of Port Blair to Diglipur connecting all major towns of Ferrargunj, Baratang, Kadamtala, Rangat, Billy Ground, Nimbudera, Mayabunder and Diglipur. This highway is known as the Andaman Trunk Road (The Great Andaman Trunk Road). ATR has become a lifeline for the people of the Andaman group of islands, especially for those residing in the North & Middle Andaman district. Because prior 1970s to early 1990s transportation of men and goods used to take several days by sea route now can be completed in a matter of 10–12 hours. NH-4 hence facilitates easy movement of essential commodities, health care facilities, etc. year-round. ATR passes through the buffer zone of the Jarwa Reserve between Jirkatang to the Middle Strait where laws are in place to minimize traveler contact with the native tribe of Jaraw ...
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National Highway 4 (India, Old Numbering)
National Highway 4 (NH 4) was a major National Highway before National Highway renumbering in Western and Southern India. NH 4 linked four of the 10 most populous Indian cities – Mumbai, Pune, Bangalore, and Chennai. NH 4 was in length and passed through the states of Maharashtra, Karnataka and Tamil Nadu. Route NH 4 constituted roughly 90% of the Golden Quadrilateral's Mumbai–Chennai segment. As a part of this project NH 4 has been widened from two-lane single carriageway to four-lane dual carriageway. The highway is known as Pune–Bangalore (PB) Road in some parts of Karnataka where it passes through. The Mumbai–Pune section of the highway was supplemented by the Mumbai–Pune Expressway in 2000. The NH 4 highway passes through highly populated towns and cities of Maharashtra, Karnataka, Tamil Nadu and Andhra Pradesh namely Pune, Satara, Karad, Sangli, Kolhapur, Belgaum, Dharwad, Hubli, Haveri, Ranibennur, Davanagere, Chitradurga, Tumkur, Bangalore, Kolar, Kanch ...
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