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प्रश्न
Name the element whose one of the allotropic forms is buckminsterfullerene.
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उत्तर
Carbon has buckminsterfullerene as one of its allotropes.
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संबंधित प्रश्न
Write any three features and give two examples of covalent compounds
Write the electron-dot structure for the following molecule.
Cl2
Fill in the blanks in the following sentence:
In forming oxygen molecule, .............. electrons are shared by each atom of oxygen.
Which inert gas does the H atom in HCl resemble in electron arrangement?
Using electron-dot diagrams which show only the outermost shell electrons, show how a molecule of nitrogen, N2, is formed from two nitrogen atoms. What name is given to this type of bonding? (Atomic number of nitrogen is 7)
Draw the electron-dot structure of NH3 and state the type of bonding.
An element A has 4 valence electrons in its atom whereas element B has only one valence electron in its atom. The compound formed by A and B does not conduct electricity. What is the nature of chemical bond in the compound formed? Give its electron-dot structure.
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?
What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.
The carbon compound is used in daily life is ______.
What is the term defined below?
A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What type of bond is formed between Y and Z.
Define the functional group and complete the following table.
| S.I. No. | Functional Group | Compound | Formula |
| (1) | ______________ | _______________ |
C2H5OH |
| (2) | _______________ | _______________ | CH3CHO |
The bond between two oxygen atoms is _______ bond.
Consider the coordination compound, K2[Cu(CN)4]. A coordinate covalent bond exists between:
Which of the following is the purest form of carbon?
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
Write notes on the characteristics of covalent compounds.
Non-polar covalent compounds are ______ conductors of heat and electricity.
