Snake produces hissing sound through

When a when powdered solid is dropped in water, it produces a hissing sound. What the solid may be ?

A little amount of water was sprinkled on a small lump of a white substance A. A lot of heat was produced with a hissing sound. The substance A got changed into an amorphous powdery mass B . Identify A and B. Also, write the chemical equation involved.

How do we produce sound through our voice box ?

A snake has no ear but it perceives sound through

A snake has no ear but it perceives sound through

A snake has no ear but it perceives sound through