Three zones of varying properties have been identified in the earth, i.e. crust, mantle and core.
1. The area of change in the density between SIAL and SIMA is known as Conrad discontinuity.
2. The area of a sudden change in seismic wave velocity is known as Moho discontinuity.
3. The mantle core boundary is determined by Gutenberg discontinuity.
Which of the statements given above is/are correct?
Important Questions on Practice Test Paper
Assertion A: Many Roman gold and silver coins, belonging to First and Second centries AD, have been discovered in South India.
Reason R: Some part of South India were under Roman occupation during this period.
Under Kigali, Amendment to Montreal Protocol India declared phasing out of HFC-23, a greenhouse gas. Consider the following statements regarding HFC-23.
1 HFC-23 gas is used in industrial refrigerators.
2 HFC-23 has 14800 times more global warming potential as compared to carbon dioxide.
3 HFC-23 is also known as trifluoromethane.
Which among the above statements is/are incorrect?
