2.76 g of silver carbonate on being strongly heated yields a
residue weighing
- 2.16 g
- 2.48 g
- 2.32 g
- 2.64 g
The Correct Option is A
Solution and Explanation
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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Concepts Used:
Some Basic Concepts of Chemistry
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.
Read More: Some Basic Concepts of Chemistry
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:
- Pure Substances are defined as a single substance (or matter) which cannot be separated by simple physical methods. Pure substances can be further classified as (i) Elements (ii) Compounds
- Mixtures are the combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion.