1.

A substance X is formed when sulphur is burnt in oxygen. When X is dissolved in water another substanceYis formed.7.a) Name X and Yb) Write word equation for formation of Y from X.c) What is observed when blue litmus is dipped in Y?

Answer»

X -> Sulphur dioxide (SO2)Y-> Sulphurous acid

SO2 + H2O-> H2SO3

Blue litmus, when dipped in sulphurous acid, turns into red litmus



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