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Chapters
2: Work and Energy
3: Current Electricity
4: Measurement of Matter
5: Acids, Bases and Salts
6: Classification of Plants
7: Energy Flow in an Ecosystem
8: Useful and Harmful Microbes
9: Environmental Management
10: Information Communication Technology (ICT)
11: Reflection of Light
12: Study of Sound
▶ 13: Carbon: An important element
14: Substances in Common Use
15: Life Processes in Living Organisms
16: Heredity and Variation
17: Introduction to Biotechnology
18: Observing Space: Telescopes
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Solutions for Chapter 13: Carbon: An important element
Below listed, you can find solutions for Chapter 13 of Maharashtra State Board Balbharati for Science and Technology [English] 9 Standard Maharashtra State Board.
Balbharati solutions for Science and Technology [English] 9 Standard Maharashtra State Board 13 Carbon: An important element Exercise [Page 149]
Select the proper option and complete the statements.
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)
All the carbon bonds in a saturated hydrocarbon ______ electrons.
single
all double
ionic
carbon
give and take
hydrogen
multiple
Share
most
covalent
At least one carbon bond in an unsaturated hydrocarbon is ______.
single
all double
ionic
carbon
give and take
hydrogen
multiple
share
most
covalent
______ is the essential element in all the organic compounds.
single
all double
ionic
carbon
give and take
hydrogen
multiple
share
most
covalent
The element hydrogen is present in ______ organic compound.
single
all double
ionic
carbon
give and take
hydrogen
multiple
share
most
covalent
Answer the following questions
Why are carbon and its compounds used as fuels?
In which compound forms does carbon occur?
Write the uses of diamond.
Explain the difference:
Diamond and graphite
Explain the difference.
Crystalline and non-crystalline forms of carbon.
Write scientific reasons.
Graphite is a conductor of electricity.
Write scientific reasons.
Graphite is not used in ornaments.
Write scientific reasons.
Limewater turns milky when CO2 is passed through it.
Write scientific reasons.
Biogas is an eco-friendly fuel.
Explain the following.
Diamond, graphite and fullerenes are crystalline forms of carbon.
Explain the following.
Methane is called marsh gas.
Explain the following.
Petrol, diesel, and coal are fossil fuels.
Explain the following.
Uses of various allotropes of carbon.
Explain the following.
Use of CO2 in fire extinguisher.
Explain the following.
Practical uses of CO2.
Write two physical properties.
Diamond
Write two physical properties.
Charcoal
Write two physical properties which are given below.
Fullerene
Complete the following Chemical reaction.
______ + ______ `→` CO2 + 2H2O + Heat
Complete the following Chemical reaction.
______ + ______ `→` CH3Cl + HCl
Complete the following chemical reaction.
2NaOH + CO2 `→` ______ + ______
Write answers to the following in detail.
What are the different types of coal?
What are the uses of coal?
How will you prove experimentally that graphite is a good conductor of electricity?
Explain the properties of carbon.
Classify carbon.
How will you verify the properties of carbon dioxide?
Solutions for 13: Carbon: An important element
Balbharati solutions for Science and Technology [English] 9 Standard Maharashtra State Board chapter 13 - Carbon: An important element
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Concepts covered in Science and Technology [English] 9 Standard Maharashtra State Board chapter 13 Carbon: An important element are Solubility of Carbon, Properties of Carbon, Allotropy and Allotropes of Carbon, Crystalline Allotropes of Carbon: Diamond, Crystalline Allotropes of Carbon: Graphite, Crystalline Allotropes of Carbon: Fullerene, Non-crystalline/Amorphous Forms: Coal, Non-crystalline/Amorphous Forms: Coke, Non-crystalline/Amorphous Forms: Charcoal, Hydrocarbons, Carbon Dioxide, Fire Extinguisher, Methane, Reaction of Carbon, Carbon: A Versatile Element, Biogas Plant.
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