• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

  • NCERT Solutions
    • NCERT Solutions for Class 12 English Flamingo and Vistas
    • NCERT Solutions for Class 11 English
    • NCERT Solutions for Class 11 Hindi
    • NCERT Solutions for Class 12 Hindi
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

Carbon and Carbon Compounds – Maharashtra Board Class 8 Solutions for General Science

Carbon and Carbon Compounds – Maharashtra Board Class 8 Solutions for General Science (English Medium)

MathematicsGeneral ScienceMaharashtra Board Solutions

Solution 1.a:
The elements found in more than one form in nature and having the same chemical properties but different physical properties are called allotropes of an element.
Allotropes of carbon are of two types – crystalline and amorphous.
The crystalline allotropes of carbon are diamond, graphite and fullerene.
The amorphous allotropes of carbon are coke and coal.

Solution 1.b:
Production of carbon dioxide gas in the laboratory:

  1. Place some pieces of calcium carbonate in a flask.
  2. Pour some dilute hydrochloric acid through a funnel into the flask.
  3. Ensure that the lower end of the funnel tube dips into the hydrochloric acid.
  4. A chemical reaction takes place between calcium carbonate and hydrochloric acid.
  5. Carbon dioxide gas released gets collected in the jar by the upward displacement of air.

carbon-carbon-compounds-maharashtra-board-class-8-solutions-general-science-1b

Solution 1.c:
Graphite is smooth and slippery because of the specific arrangement of its carbon atoms. Hence, graphite is used as a lubricant.

Solution 1.d:
Charcoal is produced by burning substances of plant origin such as wood in an insufficient supply of oxygen.

Solution 2.a:
Diamond is used to cut metals because it is extremely hard.

Solution 2.b:
Carbon dioxide is used for putting out fires because it neither burns nor supports burning.

Solution 3:

  • Graphite is a good conductor of heat and electricity.
  • Fullerene is an allotrope of carbon.
  • Carbon dioxide turns limewater milky.
  • Charcoal is an amorphous form of carbon.
  • Diamond is a bad conductor of electricity.
  • A biogas plant produces methane gas.

Solution 4:

‘A’ ‘B’
a. Fullerene 4. C60
b. Graphite 3. Hexagonal arrangement of atoms
c. Diamond 2. Cutting metals
d. Washing soda 1. Na2CO3

Solution 5:

a. Uses of carbon:
a. Carbon is the main constituent of plants and animals.
b. Diamond, an allotrope of carbon, is used in making ornaments of jewellery.

b. Uses of carbon dioxide:
a. It is used to produce aerated cold beverages.
b. It is used in fire extinguishers.

c. Uses of methane:
a. It is used as a fuel.
b. It is used to produce acetylene.

Solution 6:

S.No. Crystalline form of carbon Amorphous form of carbon
a. The atoms of the elements in the crystalline form have a specific arrangement. The atoms of the elements in the amorphous form have an irregular arrangement.
b. Carbon in the crystalline form is an extremely hard material. Carbon in non-crystalline form is brittle.
c. The examples of crystalline forms of carbon are diamond and graphite. The examples of amorphous forms of carbon are coke and coal.

 

 S.No. Diamond Graphite
 a. It is extremely hard. It is soft, smooth and slippery.
 b. It is a bad conductor of heat and electricity. It is a good conductor of heat and electricity.
 c. In a diamond crystal, each carbon atom is linked to four other carbon atoms at a specific distance. Six carbon atoms form a hexagon and are at a specific distance from each other. Within each layer, every carbon atom has three other carbon atoms around it at equal distances.
d. It is used as an ornament of jewellery, to cut glass and in drilling machines. It is used as a lubricant.

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers
  • The Summer Of The Beautiful White Horse Answers
  • Job Application Letter class 12 Samples
  • Science Lab Manual Class 9
  • Letter to The Editor Class 12 Samples
  • Unseen Passage For Class 6 Answers
  • NCERT Solutions for Class 12 Hindi Core
  • Invitation and Replies Class 12 Examples
  • Advertisement Writing Class 11 Examples
  • Lab Manual Class 10 Science

Recent Posts

  • Understanding Diversity Question Answer Class 6 Social Science Civics Chapter 1 NCERT Solutions
  • Our Changing Earth Question Answer Class 7 Social Science Geography Chapter 3 NCERT Solutions
  • Inside Our Earth Question Answer Class 7 Social Science Geography Chapter 2 NCERT Solutions
  • Rulers and Buildings Question Answer Class 7 Social Science History Chapter 5 NCERT Solutions
  • On Equality Question Answer Class 7 Social Science Civics Chapter 1 NCERT Solutions
  • Role of the Government in Health Question Answer Class 7 Social Science Civics Chapter 2 NCERT Solutions
  • Vital Villages, Thriving Towns Question Answer Class 6 Social Science History Chapter 9 NCERT Solutions
  • New Empires and Kingdoms Question Answer Class 6 Social Science History Chapter 11 NCERT Solutions
  • The Delhi Sultans Question Answer Class 7 Social Science History Chapter 3 NCERT Solutions
  • The Mughal Empire Question Answer Class 7 Social Science History Chapter 4 NCERT Solutions
  • India: Climate Vegetation and Wildlife Question Answer Class 6 Social Science Geography Chapter 8 NCERT Solutions
  • Traders, Kings and Pilgrims Question Answer Class 6 Social Science History Chapter 10 NCERT Solutions
  • Environment Question Answer Class 7 Social Science Geography Chapter 1 NCERT Solutions
  • Understanding Advertising Question Answer Class 7 Social Science Civics Chapter 7 NCERT Solutions
  • The Making of Regional Cultures Question Answer Class 7 Social Science History Chapter 9 NCERT Solutions

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions