Barkhan: Barkhans are found between high and low hills. Sometimes they get scattered here and there too. In the Sahara desert, there is also a way to move between the barkhans, which are known as Ghasi and Caravan. Their shape is also half-moon shaped and arched. When the direction of the wind changes, the position of the cloud also changes. Their size is up to 100 miles long and up to 600 feet high. The one in front of Barkhan. The slope is gentle and the opposite slope is concave.

1. Ramchandra who is also known as Ramdev. He was the ruler of the Yadav dynasty of Devagiri, India. Ramchandra Yadav was the son of Raj Krishna.

2. In 1296 AD, Alauddin Khilji again attacked Devagiri without informing Jalaluddin Khilji and kidnapped Ramchandra Dev's daughter and brought her back to Kada. Hearing this, Jalaluddin Khilji went to meet Alauddin, where Alauddin treacherously killed him. Did it.

1. In 1845, the German chemist who published a method for the synthesis of 'acetic acid', a natural product containing two carbon atoms, was Hermann Kolbe.

2. He created carbon disulfide with chlorine, and the end result was carbon tetrachloride.