Metal A is a soft metal which can be cut with knife. When a piece of this
metal is dropped in water, it reacts immediately and catches fire due to the
evolution of a gas B and formation of another compound C. Gas B is not found
free on earth.
Metal A also catches fire and burns when dropped in a jar containing a
yellowish green gas D forming a white crystalline solid.
a. Identify A, B, C, D
b. Give the balanced reactions too.
c. Write three uses of gas B.
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