Answer
418.2k+ views
Hint: To answer this question, you should recall the concept of allotropes. The term allotrope can be defined as one or more physical forms of a chemical element that occurs in the same physical state. These are structural types of the same element and therefore can exhibit differences in physical and chemical properties.
Complete Step by step solution:
Elements are substances that are made from a single type of atom. An element cannot be broken down into any other substance. These act as basic building blocks and everything in the universe is made from these. Examples include carbon, sulfur, oxygen, iron, copper, aluminium. Elements are generally denoted by their symbols. Allotropes are made up of a single element.
The major properties of allotropes include: Allotropes are various structural types of the same element and therefore can exhibit different physical and chemical properties. The allotropic forms change is caused by the same forces that influence other structures, namely light, pressure and temperature. Thus, the stability of the different allotropes relies on specific conditions.
From the options, we know that Boron can be prepared in several crystalline and amorphous forms such as \[\alpha \] -rhombohedral, \[\beta \] -rhombohedral, and \[\beta \]-tetragonal.
Thus, the correct answer to this question is option B.
Note: You should know about the most common allotrope i.e. amorphous boron. Amorphous boron contains \[{{\text{B}}_{{\text{12}}}}\] regular icosahedra that are randomly bonded to each other without long-range order. Pure amorphous boron can be produced by thermal decomposition of diborane at temperatures below \[1000\;{^\circ C}\]. Annealing at \[1000\;{^\circ C}\] converts amorphous boron to \[\beta \] -rhombohedral boron.
Complete Step by step solution:
Elements are substances that are made from a single type of atom. An element cannot be broken down into any other substance. These act as basic building blocks and everything in the universe is made from these. Examples include carbon, sulfur, oxygen, iron, copper, aluminium. Elements are generally denoted by their symbols. Allotropes are made up of a single element.
The major properties of allotropes include: Allotropes are various structural types of the same element and therefore can exhibit different physical and chemical properties. The allotropic forms change is caused by the same forces that influence other structures, namely light, pressure and temperature. Thus, the stability of the different allotropes relies on specific conditions.
From the options, we know that Boron can be prepared in several crystalline and amorphous forms such as \[\alpha \] -rhombohedral, \[\beta \] -rhombohedral, and \[\beta \]-tetragonal.
Thus, the correct answer to this question is option B.
Note: You should know about the most common allotrope i.e. amorphous boron. Amorphous boron contains \[{{\text{B}}_{{\text{12}}}}\] regular icosahedra that are randomly bonded to each other without long-range order. Pure amorphous boron can be produced by thermal decomposition of diborane at temperatures below \[1000\;{^\circ C}\]. Annealing at \[1000\;{^\circ C}\] converts amorphous boron to \[\beta \] -rhombohedral boron.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)