With reference to Indian standard Time IST meridian 82 deg 30 rsquo E consider the following stateme...........

Geography and Environment (CSC) Shape and Motions of Earth

With reference to Indian standard Time (IST) meridian (82°30’ E), consider the following statements:

1. It passes through 7 Indian states.

2. It intersects Tropic of cancer in the state of Chhattisgarh.

3. Official time signals are generated by the Time and Frequency Standards Laboratory at the National Physical Laboratory in New Delhi, for both commercial and official use.

Which of the statements given above is/are correct?

1,2 and 3

1 and 3 only

2 and 3 only

1 only

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Explanation:

Standard Meridian of India which is 82°30′ East longitude passes through Uttar Pradesh, Madhya Pradesh, Chattisgarh, Odisha and Andhra Pradesh. Hence, statement 1 is incorrect.
Tropic of cancer and IST meridian intersect at Koriya district in Chhattisgarh. Hence, statement 2 is correct.
Official time signals are generated by the Time and Frequency Standards Laboratory at the National Physical Laboratory in New Delhi, for both commercial and official use. The signals are based on atomic clocks and are synchronised with the worldwide system of clocks that support the Coordinated Universal Time. Hence, statement 3 is correct.