Q1 of 11 Page 63

Observe what happens when lemon juice falls on a Shahbad tile.

When lemon juice falls on shahbad tile which contains calcium carbonate the following chemical reaction occurs:

Calcium carbonate + lemon juice → Calcium Citrate +CO2 gas


Calcium Citrate formed on tile leaves a white mark on tile which can be cleaned with water.


More from this chapter

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2

Of which type is each of the following reactions?

(a) CaO + H2O —> Ca(OH)2 + Heat


(b) C+ O2 —>CO2


(c) Cl2+ H2 --> 2HCl


(d) 2Mg + O2---> 2MgO

 3

Write the equations for each of the following reactions and name the reactants and products of each.

(a) Coal was burnt in air.


(b) Magnesium wire was lit.


(c) Dilute hydrochloric acid was poured on to some zinc.


(d) Water was poured on calcium oxide.

 4

Match the following.

 2

Find out about the effects that perfumes have on jewelry / ornaments.