Questions

southern region is closest to equator and thus receives sunlight for longer duration than any other part of India

Cryogenic Engines find applications in Rocket technology. A cryogenic rocket engine is a rocket engine that uses a cryogenic fuel or oxidizer, that is, its fuel or oxidizer are gases liquefied and stored at very low temperatures. Notably, these engines were one of the main factors of NASA's success in reaching the Moon by the Saturn V rocket.

Sodium hydroxide - NaOH is caustic soda

Sodium carbonate - Na2CO3 is washing soda

Sodium bicarbonate - NaHCO3  is baking soda 

12 N in a C means 12 Numbers in a Clock. 

The given letter equation 76 TL the BP means that 76 Trombones Led the Big Parade.