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Solution


Q.

Read the passage carefully and answer the following questions from (i) to (v):

 

Marble’s popularity began in ancient Rome and Greece, where white and off-white marble were used to construct a variety of structures, from hand-held sculptures to massive pillars and buildings.

(iv) Marble statues are corroded or stained when they repeatedly come into contact with polluted rain water. Identify the main reason.
1 Decomposition of calcium carbonate to calcium oxide  
2 Polluted water is basic in nature hence it reacts with calcium carbonate  
3 Polluted water is acidic in nature hence it reacts with calcium carbonate  
4 Calcium carbonate dissolves in water to give calcium hydroxide  

Ans.

(3)