Answer: D) 2.6 g of solute in 2 ml of solution Explanation: A concentrated solution will contain the most solute molecules per solvent molecules. Here in the given options, 1)  6/10 = 0.6 2) 20.5/50 = 0.41 3) 30/120 = 0.25 4) 2.6/2 = 1.3   Hence, option D) is most concentrated.

Answer: B) Assam Explanation: Alternately it is also called as Pragjyotisha before British rule.

Answer: B) Boogie - Woogie Explanation: Pine Top Smith (1899-1929) Considered to be the originator of the Boogie -Woogie style of piano playing.

Answer: B) 150 Explanation: Half of the cloth = 37.5/2 From 1 meter he will make 8 pieces=> in 37.5/2 ---- ? 37.5/2 x 8 = 150.

Ecology is the study of the relationships between living organisms, including humans and their physical environment. The German scientist Earnst Haeckel was the first to use this word in 1869.