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प्रश्न
State any two uses of diamond.
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उत्तर
Uses of diamonds:
(1) As diamonds have an extraordinary shine, they are used in making jewellery.
(2) Diamonds, due to their hardness, are used in instruments like glass cutters, grinders. They are also used as abrasives for polishing.
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संबंधित प्रश्न
What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint – the eight atoms of sulphur are joined together in the form of a ring.)
What is buckminsterfullerene?
Which inert gas does the H atom in HCl resemble in electron arrangement?
Draw the electron-dot structure of N2 and state the type of bonding.
Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
The atomic numbers of four elements P, Q, R and S are 6, 10, 12 and 17 respectively. Which two elements can combine to form a covalent compound?
(a) P and R
(b) Q and S
(c) P and S
(d) R and S
Buckminsterfullerene is an allotropic form of the element:
(a) phoshorus
(b) fluorine
(c) carbon
(d) sulphur
Give two example in following case:
Solid covalent compounds
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Choose the correct answer from the options given below
Condition favorable for formation of a covalent bond is
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?
Compare the compounds carbon tetrachloride and sodium chloride with regard to solubility in water and electrical conductivity.
Draw the electron dot diagram and structure of methane.
What do you understand by dipole (polar) molecule?
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.
Define a covalent bond.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
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Discuss in brief about the properties of coordinate covalent compounds.
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.
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.
