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प्रश्न
How buckminsterfullerene is it related to diamond and graphite?
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उत्तर
Buckminstterfullerene along with diamond and graphite are allotropes of the element carbon with symbol C.
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संबंधित प्रश्न
What is buckminsterfullerene?
Draw the electron-dot structure of N2 and state the type of bonding.
A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be
(a) 200
(b) 198
(c) 202
(d) 196
The number of isomers formed by the hydrocarbon with molecular formula C5H12 is:
(a) 2
(b) 5
(c) 3
(d) 4
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.
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is:
(a) fifty
(b) sixty
(c) seventy
(d) ninety
The electronic configurations of two elements A and B are given below:
| A | 2, 6 |
| B | 2, 8, 1 |
(a) What type of chemical bond is formed between the two atoms of A?
(b) What type of chemical bond will be formed between the atoms of A and B?
Give the characteristic properties of covalent compounds.
Explain the following:
polar covalent compounds electricity.
Explain the following briefly:
Cl2 is a non polar molecule, while HCl is a polar molecule.
Give examples for the following:
Two gaseous non polar compounds.
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
X is likely to have a :
Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.
Give reason as to why hydrogen chloride can be termed as a polar covalent compound.
Potassium (Atomic No. 19) and chlorine (Atomic No. 17) react to form a compound. On the basis of electronic concept, explain
(i) oxidation
(ii) reduction
(iii)oxidising agent
(iv)reducing agent
Which of the following statements are correct for carbon compounds?
- Most carbon compounds are good conductors of electricity.
- Most carbon compounds are poor conductors of electricity.
- Force of attraction between molecules of carbon compounds is not very strong.
- Force of attraction between molecules of carbon compounds is very strong.
Two carbon atoms can always form one or two covalent bonds.
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.
