Indian nuclear tests (general knowledge): India’s second underground nuclear test series was conducted at which test site?

Introduction / Context:
Knowledge of major scientific and strategic events is common in general studies. India’s nuclear tests are historically associated with a specific test range in Rajasthan.

Given Data / Assumptions:

• “Second underground nuclear test” refers to India’s subsequent test campaign after the first underground test.
• Options list locations known for defence or nuclear facilities.

Concept / Approach:
Both the 1974 test (Smiling Buddha) and the 1998 test series (Pokhran-II) were conducted at the Pokhran Test Range in Rajasthan. Other listed places are either nuclear power or research sites (Kalpakkam, Narora) or cities without this specific association (Jaisalmer district is nearby but the named test site is Pokhran).

Step-by-Step Solution:
Identify India’s nuclear test site: Pokhran Test Range, Rajasthan.Match to options: “Pokhran”.Therefore, select Pokhran.

Verification / Alternative check:
Public records and historical accounts confirm Pokhran as the site for both series of tests.

Why Other Options Are Wrong:
Jaisalmer: a district/city, but the designated range is Pokhran. Kalpakkam: site of Madras Atomic Power Station and nuclear research facilities, not test site. Narora: nuclear power station in Uttar Pradesh, not a test range.

Common Pitfalls:

• Confusing power-generation sites with test ranges.
• Associating the broader region (Thar desert) with a specific named site.

Final Answer:
Pokhran