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Explain Why, Diamond Has a High Melting Point. - Science

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प्रश्न

Explain why, diamond has a high melting point.

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उत्तर

Diamonds has a very high melting point, as a huge amount of heat energy is required to break the strong covalent bonds in one crystal of a diamond. The melting point of diamonds is above 3500oC.

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अध्याय 4: Carbon And Its Compounds - Exercise 1 [पृष्ठ २२२]

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लखमीर सिंग Chemistry (Science) [English] Class 10
अध्याय 4 Carbon And Its Compounds
Exercise 1 | Q 36.3 | पृष्ठ २२२

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

Write the electron-dot structure for the following molecule.

Cl2


Fill in the blank in the following sentence:

Two atoms of the same element combine to form a molecule. The bond between them is known as ................ bond.


Which inert gas does the H atom in HCl resemble in electron arrangement?


State any two uses of diamond.


Why are covalent compounds generally poor conductors of electricity?


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?


What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.


Elements forming ionic compounds attain noble gas electronic configuration by either gaining or losing electrons from their valence shells. Explain giving reason why carbon cannot attain such a configuration in this manner to form its compounds. Name the type of bonds formed in ionic compounds and in the compounds formed by carbon. Also explain the reason why carbon compounds are generally poor conductors of electricity.


Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water


Explain the following term with example.

Homopolymer


Explain the following briefly.
Pure water does not conduct electricity, but on adding sodium chloride to it, it starts conducting electricity.


Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.


The following table shows the electronic configuration of the elements W, X, Y, Z:

Element

W

X

Y

Z

Electronic
Configuration

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.


Fill in the blank from the choice given in bracket.
The compound that does not have a lone pair of electrons is ___________. (Water, Ammonia, carbon tetrachloride)


State the type of bond formed when the combining atom has small E.N. difference.


Name two compounds that are covalent when taken pure but produce ions when dissolved in water.


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


Define a covalent bond.


Write an Explanation.

Alkane


The number of single and double bonds present in a molecule of benzene (C6H6) respectively, are ______.


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