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प्रश्न
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure.
(a) Name the element E.
(b) What is allotrope A.
(c) What is allotrope B?
(d) What is allotrope C?
(e) Which allotrope is used in making jewellery?
(f) Which allotrope is used in making anode of a dry cell?
उत्तर
(a) Carbon is the element 'E' which exists in three allotropic forms A, B and C.
(b) Buckminsterfullerene is the allotrope, A, of carbon in which the atoms are joined to form spherical molecules.
(c) Graphite is the allotrope, B, of carbon which is surrounded by three other carbon atoms to form a sheet like structure.
(d) Diamond is the allotrope, C, of carbon in which each atom is surrounded by four other carbon atoms to form a rigid structure.
(e) The allotrope C (Diamond) is used to make jewellery.
(f) The allotrope B (Graphite) is used in making anode of a dry cell.
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संबंधित प्रश्न
Ethane, with the molecular formula C2H6 has ______.
Name the hardest natural substance known.
What do you call the compounds having the same molecular formula but different structural arrangements of atoms?
Give one example, state what are covalent compounds?
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
One of the following compounds is not ionic in nature. This compound is:
(a) Lithium chloride
(b) Ammonium chloride
(c) Calcium chloride
(d) Carbon tetrachloride
The electronic configurations of three elements X, Y and Z are as follows:
| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
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Give reasons for your choice.
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When the nuclei of two different reacting atoms are of ______ mass, then a bond so formed is called ______ covalent bond. (equal, unequal, polar, non-polar)
Draw all possible structural formulae of compound from their molecular formula given below.
C3H8
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Covalent bond
Write answer as directed.
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X is likely to have a :
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which electrode will Y migrate to during the process of electrolysis?
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