If India were to disintegrate, which states will acquire nuclear bombs? How is it decided?

When the time India gets disintegrated into new nations nuclear weapons will not be a priority because then global warming will be bigger catastrophe than nuclear weapons.

Goa I understand this may come as a surprise to most of you, but I think Goa is strategically and tactically a strong contender to hold the nuclear war heads. Consider the case where India splits into smaller fraction, for the reason of possessing more autonomy of each region, rather than hatred towards each other. Each fraction of the prior Union might not be fond of the other fraction, but would still stand united in case of an attack from eminent enemies like China or Pakistan.  With India splitting to smaller fractions, a strong concern would be arm twisting by external powers to get hold of the nuclear warheads, and this where Goa shines as an excellent contestant, here is why: 1) Given Goa is an exceptionally popular International tourist destination, any unannounced land attack or civilian attack from a western force (American/European) would have a high chance of causing casualties to the individuals of those nations, and would immediately cause an uproar in the home countries 2) Goan civilian airport is also a military airbase, and regularly conducts training drills. Given Goa is a small state, conducting air surveillance wouldn't arise any suspicion and pass of as regular air drills. Including, but not limited with this beautiful VTOL (Vertical take-off and landing beast) 3) The aforementioned airport is in very close proximity, to an education campus of 180 Acres (BITS-Pilani, Goa Campus) which would form a strong site to hide the warheads, as Geneva convention condemn in the highest degree to disturb an education center, which would lead to immediate intervention of global UN forces. This is one the supporting reasons, that it is widely rumored for MIT campus to hide the undisclosed location of root DNS boxes. And given the proximity to the airbase, surveillance would be super easy. Counter to point (3): "International conventions on the conduct of war, such as geneva convention universally condemn attacks on educational institutions because it it is implicitly understood that such institutions will not be used for military purposes. In fact, I'd think it's highly irresponsible to use the excuse of the protection under international law to covertly militarize a campus" - 4) India is one of the few countries to have blue water navy capabilities, and with upcoming addition of INS Vishal  to Vikrant and Vikramaditya fleet, it would further add to our abilities to swiftly counter attacks from the sea. 5) Range of our ICBM (Inter continental ballistic missiles) would still have the ability to strike into the heart of our immediate dangers. 6) In case of a disaster, where there is imminent threat to our ability to safegaurd the warheads, it would easier to quickly dispose them off in the Indian Ocean, to keep them away from prying hands. 7) Goa is relatively rich state within India, with a self sufficient economy, and no history of prior violence, so the chances of Goa using the warheads against other fractions of the Indian Union are remote.

No child state will be a nuclear power if India falls apart. India(along with Pakistan and Iran), did not sign the https://en.wikipedia.org/wiki/Treaty_on_the_Non-Proliferation_of_Nuclear_Weapons.  If India disintegrates, one of the first things NATO would do is arm-twist the child nations to sign the NPT.  Now the only reason India did not sign the NPT in the first place was Pakistan. Now that each child country has its own interests and problems, they will probably sign it.  The world will probably be better off with no nuclear states in the subcontinent, rather than every Tom Dick and Harry boasting of nuclear weapons.

If India disintegrates all nuclear devices will probably be disabled on a priority basis.Nuclear devices are not resources and not subject to sharing agreements.The day India ceases to exist all such devices will cease to exist too.

India will only become bigger as other smaller countries around India will find it worthwhile to exist in a federal setup as an 'Union of Indian Subcontinent'. This setup shall be stronger than today with more decentralized control on local issues and a stronger central force on defense, international relations, economic decisions and pan-subcontinental policies. This shall be an economic, cultural and innovation powerhouse. The world is headed towards unions with global free trade, regional defense agreements and common regional currencies. Probably, this hypothetical question on disintegration is retrogressive thinking.

imaginations has no boundaries .The answer to your question is 'which ever state is more dominating, gets the brass'.not considering the (most likely) event of 'international intervention' to safe guard the world by taking out nuke from civil war like country. # nuclear proliferation, nuke in failed state. The assumptions of 'peacefully disintegration' by brothers is myth , creation of Pakistan proved it. To believe all states will simply figure out is  rubbish, its every man for himself.    India is no USSR, Russia was epicenter of soviet union. All of the unions(states) got stitched into Russian emperor over course of time and became USSR . so obviously Delhi will not work since Indian identity is spread over large land mass . Most likely (the symbolic) Delhi will be absorbed by giant UP or Haryana. Most likely scenario,  Indians after  burning down constitution newly balkanized  must engage in pit fight. Fights can be started by social media warriors, but the states must be ready for civil war. Two or more states can join to over power other  tag teamed states, then later fight them self in order to figure out  who is the bad ass of them all. Following afghan war lords manuscripts will be great help.out of this smaller states will have tough time , chances of getting sucked into bigger states are high Goa, Sikkim, tribura,  unions and the islands... Jammu kashmir will be out of the race since (quite) Pakistan will  do other states a favor by entering the valley one fine day. Himachal will also be distracted and possibly less likely to survive.    Arunachal Pradesh will also be taken under the protection of People's republic? chinaso AP gets taken out by filtration process.Now rest of the states will definitely have to fight it out,not only for nukes, but ISRO natural resources,ideologies, ports, army, navy, air force,  rail ways,bonds,goodwill,  and every things once maintained  collectively by Indians ( Courtesy of Pakistan experiment)