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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (मराठी सेमी-इंग्रजी) इयत्ता ९ वी

In which compound forms does carbon occur?

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प्रश्न

In which compound forms does carbon occur?

टीपा लिहा
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उत्तर

Carbon occurs in the following compounds:

  1. Hydrocarbons: These are organic compounds which are made up of carbon and hydrogen.
  2. CO2: Carbon also exists as carbon dioxide and occurs in the air in a free state. it is also found as a salt in chalk and limestone.
  3. Fossil fuel: coal, petroleum, natural gas.
  4. Carbonaceous nutrients: carbohydrates, proteins, fats.
  5. Natural fibres: cotton, wool, silk.
  6. CH4: Carbon also exists as methane.
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पाठ 13: Carbon: An important element - Exercise [पृष्ठ १४९]

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बालभारती Science and Technology [English] Standard 9 Maharashtra State
पाठ 13 Carbon: An important element
Exercise | Q 2. b. | पृष्ठ १४९

संबंधित प्रश्‍न

In addition to some propane and ethane, LPG cylinders contain mainly two isomers of another alkane. Name the two isomers and write their condensed structural formulae.


Write true or false

Carbon constitues 0.03% of the earth’s crust.


Choose the correct alternative

The process by which decayed plants slowly convert into coal is called.


Define the following:

Adsorption


What is a fire extinguisher ? What is the substance used in the modern type of fire extinguishers ? How is it an improvement over the soda acid-type and the foam-type fire extinguishers ?


Tick the most appropriate answer.

Carbon has a great affinity for
a. sulphur
b. nitrogen
c. oxygen
d. none of these


FILL IN THE BLANK

Natural gas is an important ............. fuel.


What is the atomic number of carbon ?


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)


 Draw the structures for ethanoic acid.


Answer the following question.
Why are methane compounds have low melting and boiling points?


Explain the term ‘dry ice’. State its application.


Select the appropeiate option of the following statement:

An allotrope of carbon obtained by burning kerosene oil in a limited supply of air.


Give a balanced equation for the following conversion: [In one or two steps]

Calcium bicarbonate to calcium nitrate using a dilute acid.


Match the following.

1. Alkyne Bucky Ball
2. Andre Geim Oxidation
3. C60 Graphene
4. Thermocol Triple bond
5. Combution Polystyrene

Higher Order Thinking Skill.

Why do carbon exist mostly in combined state?


Structural formula of benzene is


Cigarette smoking is a source of ______.


There is more abundance of carbon on the earth.


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