Fill in the blanks:

(1) The chemical formula of POP is ________

(2) The chemical reaction during which H_2(g) is lost is termed as

(3) Corrosion can be prevented by using

(4) When acids and alkalis react together, and are formed.

(5) The chemical reactions in which heat is liberated are called reactions.

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Solution

(1) The chemical formula of POP is CaSO₄.H₂O.

(2) The chemical reaction during which H₂_(g) is lost is termed as oxidation reaction.

(3) Corrosion can be prevented by using antirust solution.

(4) When acids and alkalis react together, salt and water are formed.

(5) The chemical reactions in which heat is liberated are called exothermic reactions.

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H_{2 (g)}

Fill in the blanks :

(a) A reaction in which two or more substances combine to form a single substance is called a ___ reaction.

(b) A ___ is a substance which changes the rate of a chemical reaction without undergoing a chemical change.

(d) The reaction between an acid and a base is called ___

(e) Soluble bases are called ___

(f) The chemical change involving iron and hydrochloric acid illustrates a ___ reaction.

(g) In the type of reaction called ___ two compounds exchange their positive and negative radicals respectively.

(h) A catalyst either ___ or ___ the rate of a chemical change but itself remains ___ at the end of the reaction.

(i) The chemical reaction between hydogen and chlorine is a ___ reaction

(j) When a piece of copper is added to silver nitrate solutuions, it turns ___ in colour.

The chemical reactions in which the light energy is liberated or absorbed is called thermochemical reactions.

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