Advertisements
Advertisements
Question
Name the black substance of pencil. Will the current flow through the electrical circuit when we use the sharpened ends of the pencil to complete the circuit?
Advertisements
Solution
The black substance inside a pencil is graphite.
Yes, current will flow through the electrical circuit if we use the sharpened ends of the pencil to complete the circuit, as graphite is a good conductor of electricity.
APPEARS IN
RELATED QUESTIONS
Name the type of bonds formed in ionic compounds and in the compounds formed by carbon.
Explain the nature of the covalent bond using the bond formation in CH3Cl.
What type of chemical bond is formed between carbon and bromine?
What is the atomic number of carbon. Write its electronic configuration.
Draw the electron-dot structure of H2O compound and state the type of bonding.
what substance is graphite made?
The molecules having triple bond in them are:
(a) oxygen and ethyne
(b) carbon dioxide and ammonia
(c) methane and ethene
(d) nitrogen and ethyne
Two non-metals combine with each other by the sharing of electrons to form a compound X.
(a) What type of chemical bond is present in X?
(b) State whether X will have a high melting point or low melting point.
(c) Will it be a good conductor of electricity or not?
(d) Will it dissolve in an organic solvent or not?
Complete the following:
In case of non-polar covalent bond, the covalent bond is formed in the ______ of atoms and shared electrons are ______ distributed. (corner, middle, equally, unequally)
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.
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
In the liquid state, X will
Explain the bonding in methane molecule using electron dot structure.
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.
The bond between two oxygen atoms is _______ bond.
Write the molecular formula of the given compound.
Propylene
Give an example for each of the following statement.
A compound in which three covalent bonds are formed.
`"CH"_3 - "CH"_2 - "OH" overset("Alkaline""KMnO"_4 + "Heat")(->) "CH"_3 - "COOH"`
In the above given reaction, alkaline KMnO4 acts as
______ is an example of a covalent compound having a high melting point.
Write notes on the characteristics of covalent compounds.
