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प्रश्न
State any two uses of graphite.
उत्तर
Uses of graphite:
(1) As graphite is a good conductor of electricity, it is used in making carbon electrodes in dry cells.
(2) Graphite is used in making pencil leads and black paints.
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संबंधित प्रश्न
Why are most carbon compounds poor conductors of electricity?
How does graphite act as a lubricant?
Give one example of a molecule containing a triple covalent bond.
Draw the electron-dot structure of CO2 compound and state the type of bonding.
Draw the electron-dot structure of N2 and state the type of bonding.
What is the difference between ionic compounds and polar covalent compounds?
State the type of bonding in the following molecule.
Water
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Ethene
Draw all possile structural formulae of compound from their molecular formula given below.
C4H10
Explain the following briefly.
Pure water does not conduct electricity, but on adding sodium chloride to it, it starts conducting electricity.
Explain the structure of Ammonium ion.
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
The type of bonding in X will be
An element L consists of molecules.
What type of bonding is present in the particles that make up L?
The molecular masses of a carbon compound spread over a range of _______.
Write an Explanation.
Alkane
Give an example for each of the following statement.
A compound in which three covalent bonds are formed.
Identify the incorrect statement and correct them.
- Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity.
- Ionic bond is a weak bond when compared to Hydrogen bond.
- Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
- Loss of electrons is called Oxidation and gain of electron is called Reduction.
- The electrons which are not involved in bonding are called valence electrons.
Which of the following is the formula of Butanoic acid?
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.
