Some Basic Concepts Of Chemistry Question 68

Question: 20 g of $ CaCO _3 $ on heating gave 8.8 g of $ CO _2 $ and 11.2 g of CaO. This is in accordance with

Options:

A) The law of conservation of mass.

B) The law of constant composition.

C) The law of reciprocal proportion.

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

[a] $ \underset{20g}{\mathop{CaCO _3}},\to \underset{8.8g}{\mathop{CaO}},+\underset{11.2g}{\mathop{CO _2}}, $ mass of reactant = mass of products = 20g. Hence the law of conservation of mass is obeyed.



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