1. Palk Strait is a strait between the Indian state of Tamil Nadu and the Mannar district of the Northern Province of Sri Lanka.

2. This strait connects the Bay of Bengal to the Palk Bay in the north-east and then to the Gulf of Mannar in the south-west.

3. The strait that separates India and Sri Lanka is the Palak Strait.

Dehradun is the capital city of Uttarakhand.

1. Indian black soil is commonly known as black cotton soil or "Regur".

2. Black soil is known as black cotton soil because cotton is an important crop which is grown in this type of soil.

3..Black soil is good for the production of cotton, oilseeds, wheat, linseed, millet and tobacco. This soil is rich in calcium carbonate, potash, lime but has low phosphorus content. Black soils can hold a lot of moisture.

4. It is mostly found in the peninsular plateau of India.

Blue Jay or Indian Roller is the state bird of 3 Indian states. The Blue Jay or Indian Roller is also known as Coracias benghalensis.

1. During an earthquake, the velocity of the upper part of the waves will increase along with the increase in density which will propel the object passing through it.

2. Earthquake shock When seismic waves occur in a place with soft soil sediments, their propagation increases the natural period, which produces an echo.