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Fill in the blanks to complete the following paragraph.

The name of the product formed in the reaction of sulphur and
_____________ is sulphur dioxide gas. When sulphur dioxide is
dissolved in_________________, sulphurous acid is formed. The
sulphurous acid turns _____________ litmus paper to ____________.
Generally oxides of __________ are acidic in nature.
After completing the paragraph write two questions which you
can raise on the basis of this information.

Science - Exemplar Problems

Chapter 4. Materials: Metals and Non-Metals


The name of the product formed in the reaction of sulphur and oxygen is sulphur dioxide gas . When sulphur dioxide is dissolved in water , sulphurous acid is formed . The sulphurous acid turns blue litmus paper to red . Generally oxides of non-metals are acidic in nature . 
(i) What is the formula for sulphurous acid ?
(ii) Metals are generally_______ in nature . 
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3-blue to red
4-non metals

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