
From the following compounds, non-stoichiometric compounds is/are: (This question can have multiple correct answers)
(A)
(B)
(C)
(D)
Answer
472.2k+ views
Hint: It is important to understand what non-stoichiometric compounds are, and what makes a compound non-stoichiometric. They may appear from their structures that they are stoichiometric, but they may not necessarily be one. Try to find a common link that exists among all non-stoichiometric compounds.
Complete answer: Compounds whose elemental composition can’t be shown in the form of ratios of natural numbers are called Non-stoichiometric compounds. They are mostly inorganic in nature and invariably metallic solids. These are generally observed as defects in the crystal lattice, such as atoms missing in a lattice or packing of too many atoms in the lattice structure. Many metal oxides and sulfides show non-stoichiometric defects. Let’s discuss the options given in the question. Yttrium barium copper oxide, which has the general formula , is a non-stoichiometric superconductor. As option 4 has a similar non-stoichiometric structure, it is one of the answers.
While preparing cuprous oxide, , the ratio of copper to oxygen is slightly less than 2:1, making it a non-stoichiometric crystal. To maintain electrical neutrality, there is a replacement of one ion for every ions, making a hole. Hence also serves as a p-type semiconductor. Similar to , is also non-stoichiometric as the ratio of Cu to S is slightly less than 2:1. In fact the ratio lies between 1.96 - 2; making it a non-stoichiometric compound. Same thing is applicable for as well.
Hence all given compounds are non-stoichiometric compounds.
Additional information: Non-stoichiometric compounds resulting out of these defects exhibit some special chemical and electrical properties. Hence they find their application in ceramics, superconductive materials, and in battery system designs. Modern definition treats non-stoichiometric compounds as homogeneous and not as mixtures. Non-Stoichiometric compounds are of two types, viz. compounds with metal excess defects and compounds with metal deficiency defects.
Note:Non-stoichiometric compounds are generally metal oxides and sulfides. Their structure doesn’t tell you about their non-stoichiometry, but the ratio of the number of atoms in a unit cell doesn’t give a natural number. That is the reason all the four options are non-stoichiometric compounds.
Complete answer: Compounds whose elemental composition can’t be shown in the form of ratios of natural numbers are called Non-stoichiometric compounds. They are mostly inorganic in nature and invariably metallic solids. These are generally observed as defects in the crystal lattice, such as atoms missing in a lattice or packing of too many atoms in the lattice structure. Many metal oxides and sulfides show non-stoichiometric defects. Let’s discuss the options given in the question. Yttrium barium copper oxide, which has the general formula
While preparing cuprous oxide,
Hence all given compounds are non-stoichiometric compounds.
Additional information: Non-stoichiometric compounds resulting out of these defects exhibit some special chemical and electrical properties. Hence they find their application in ceramics, superconductive materials, and in battery system designs. Modern definition treats non-stoichiometric compounds as homogeneous and not as mixtures. Non-Stoichiometric compounds are of two types, viz. compounds with metal excess defects and compounds with metal deficiency defects.
Note:Non-stoichiometric compounds are generally metal oxides and sulfides. Their structure doesn’t tell you about their non-stoichiometry, but the ratio of the number of atoms in a unit cell doesn’t give a natural number. That is the reason all the four options are non-stoichiometric compounds.
Recently Updated Pages
Express the following as a fraction and simplify a class 7 maths CBSE

The length and width of a rectangle are in ratio of class 7 maths CBSE

The ratio of the income to the expenditure of a family class 7 maths CBSE

How do you write 025 million in scientific notatio class 7 maths CBSE

How do you convert 295 meters per second to kilometers class 7 maths CBSE

Write the following in Roman numerals 25819 class 7 maths CBSE

Trending doubts
Give 10 examples of unisexual and bisexual flowers

Draw a labelled sketch of the human eye class 12 physics CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Differentiate between insitu conservation and exsitu class 12 biology CBSE

What are the major means of transport Explain each class 12 social science CBSE

Franz thinks Will they make them sing in German even class 12 english CBSE
