Yes, you can request early publication in India. In order to make the request in the first place, you need to use Form 9. Along with this, you must pay the prescribed fee. The IPO will publish the application within one month of the date of the request.
Generally, people go for an early publication in India if they are ready to go ahead and disclose their invention to the public. Basically, they feel confident about their invention, and want to get a patent grant for it before anyone else. Early publication gives you the advantage if you are in a race with a competitor to secure patent rights for an innovation.
Also, do make sure that you check out this free e-book: A Quick Guide to Patents. Basically, it deals with basics of patent procedures.
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