How many chapters are there in the Indian Constitution?

No. Now there may be 402 articles in "indian constitution," whatever you mean by that... but if there ARE, then there [would be] 402 articles, as above. "Articles" is plural, so the plural form of "to be" must be used, which is "are." "ARE there 402 (four hundred and two) articles in [the] [I]ndian [C]onstitution?"