40.I am an acid present in our stomach and helps in digestion .Who am

1.	40.I am an acid present in our stomach and helps in digestion .Who am I ?41.I am a chemical mixed with LPG that helps in the detection of leakage. Who am I ?42.I am an universal solvent and I can dissolve many substances. Who am I ?
Answer» ANSWER: WORLD Nile: 4,132 MILES. Amazon: 4,000 miles. Yangtze: 3,915 miles

40.I am an acid present in our stomach and helps in digestion .Who am I ?41.I am a chemical mixed with LPG that helps in the detection of leakage. Who am I ?42.I am an universal solvent and I can dissolve many substances. Who am I ?

Answer»

WORLD

Nile: 4,132 MILES.

Amazon: 4,000 miles.

Yangtze: 3,915 miles