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प्रश्न
Why are carbon and its compounds used as fuels?
उत्तर
The following explanations explain why fuels made of carbon and its compounds are used:
- Because of their high hydrogen and carbon content, they provide combustion with a significant amount of heat.
- Fuel-grade carbon compounds are straightforward to work with and have high calorific values and ideal ignition temperatures.
- There is control over their combustion. Carbon and its components are therefore employed as fuels.
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संबंधित प्रश्न
Fill in the blank.
The name ‘carbon’ is derived from the Latin word...........
Fill in the blank
...............is used in making black shoe polish.
Define the following:
Adsorption
Name the products formed when:
wood is burnt in the absence of air.
Name the products formed when:
bone is heated in the absence of air.
How will you collect the gas ?
Explain the term ‘green house effect’. How can it be both beneficial and harmful for life on earth ?
State three ways by which carbon dioxide gas is added into the atmosphere.
Match the colunm
| column A | column B |
| 1. A product of incomplete burning | a. Hopcolite |
| 2. Nature of carben monoxide | b. Combustible gas |
| 3. A compound formed by the combination of haemoglobin and carbon monoxide | c. carboxy-haemoglobin |
| 4. A mixture of metallic oxides | d. Carbon monoxide |
| 5. Carbon monoxide | e. Highly poisonous |
Tick the most appropriate answer.
Each molecule of Buckminster fulierene contains 60 atoms of carbon arranged as balls consisting of 12 pentagons and
a. 20 hexagons
b. 30 hexagons
c. 40 hexagons
d. 50 hexagons
FILL IN THE BLANK
..................... is used as a pigment and colouring matter in ink and shoe polish.
Name a gas which, though a compound of carbon, is not studied under organic chemistry.
In which compound forms does carbon occur?
A carbon atom forms a ______ bond with other atoms. In this bond the two atoms ______ electrons.
(single, all, double, ionic, carbon, give and take, hydrogen, multiple, share, most, covalent)
Give a balanced equation for the following conversion: [In one or two steps]
Carbon dioxide to carbon.
Complete the statement by filling the blank with the correct word from the option.
Sodium oxide combines with carbon dioxide to give _____
Give reason for the following:
It is dangerous to stand behind a running engine of a vehicle.
The main component of water gas is ______.
The carbon cycle is the ______ cycle.
