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प्रश्न
What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.
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उत्तर
When methane (natural gas) burns in air, carbon dioxide and water vapour are formed along with the release of a large amount of heat. This process is known as combustion.
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संबंधित प्रश्न
Elements forming ionic compounds attain noble gas configuration by either gaining or losing electrons from their outermost shells. Give reason to explain why carbon cannot attain noble gas configuration in this manner to form its compounds.
State the reason to explain why covalent compounds "are bad conductors of electricity".
What would be the electron dot structure of carbon dioxide which has the formula CO2?
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?
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
What type of chemical bonds are formed by carbon? Why?
Give two general properties of ionic compounds and two those of covalent compounds.
Which of the following has a triple bond as well as single bonds?
(a) ethene
(b) methane
(c) ethyne
(d) nitrogen
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is:
(a) fifty
(b) sixty
(c) seventy
(d) ninety
You can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? Why?
What is the difference between ionic compounds and polar covalent compounds?
Explain the following term with example.
Unsaturated hydrocarbon
Molecular formula of Propane is C3H8 , write the structural formula of propane.
What are the term defined below?
A bond formed by share pair of electrons, each bonding atom contributing one electron to the pair.
What do you understand by dipole (polar) molecule?
Explain the following:
Water is a polar covalent molecule.
Covalent bonds can be single, double or triple covalent bonds. How many electrons are shared in each? Give an example of each type.
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.
The table shows the electronic structures of four elements.
| Element | Electronic Structure |
| P | 2, 6 |
| Q | 2, 8, 1 |
| R | 2, 8, 7 |
| S | 2, 8, 8 |
- Identify which element(s) will form covalent bonds with carbon.
- “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.
