Question:
2.76 g of silver carbonate on being strongly heated yields a
residue weighing
2.76 g of silver carbonate on being strongly heated yields a
residue weighing
Updated On: July 22, 2025
- 2.16 g
- 2.48 g
- 2.32 g
- 2.64 g
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The Correct Option is A
Solution and Explanation
Unlike other metal carbonates that usually decomposes into metal
oxides liberating carbon dioxide, silver carbonate on heating
decomposes into elemental silver liberating mixture of carbon
dioxide and oxygen gas as : M
$ Ag_2CO_3 \, _{\longrightarrow \, \, \, \, }^{Heat} 2Ag (s) + CO_2(g) + \frac{1}{2} O_2(g) $
MW = 276 g $ \hspace26mm $ 2 x 108 = 216 g
Hence, 2.76 g of $Ag_2CO_3 $ on heating will give
$ \frac{216}{216 } \times 2.76 $ = 2.16g Ag as residue.
oxides liberating carbon dioxide, silver carbonate on heating
decomposes into elemental silver liberating mixture of carbon
dioxide and oxygen gas as : M
$ Ag_2CO_3 \, _{\longrightarrow \, \, \, \, }^{Heat} 2Ag (s) + CO_2(g) + \frac{1}{2} O_2(g) $
MW = 276 g $ \hspace26mm $ 2 x 108 = 216 g
Hence, 2.76 g of $Ag_2CO_3 $ on heating will give
$ \frac{216}{216 } \times 2.76 $ = 2.16g Ag as residue.
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Chemistry is a vast subject and for understanding its significance we can take help of following points:
- Chemistry plays an important role in understanding various subjects like physics, geology and biology.
- Chemistry is a core branch of science that explains us about the various compositional properties and interaction of matter. It also helps to understand various chemical reactions.
- Chemistry is important in order to understand the behaviour of fertilizers, alkenes, acids, salts, dyes, polymers, drugs, soaps and alloys in organic and inorganic chemistry.
- Chemistry plays an important role in various fields like healthcare, industrial, research, food, and farm activities.
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Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
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