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NCERT solutions Science Class 10 chapter 4 Carbon and its Compounds

Chapters

NCERT Science Class 10

Science Textbook for Class 10

Chapter 4 - Carbon and its Compounds

Page 61

What would be the electron dot structure of carbon dioxide which has the formula CO2?

Q 1 | Page 61

What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint – the eight atoms of sulphur are joined together in the form of a ring.)

Q 2 | Page 61

Pages 68 - 69

 How many structural isomers can you draw for pentane?

Q 1 | Page 68

What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?

Q 2 | Page 68

What will be the formula and electron dot structure of cyclopentane?

Q 3 | Page 68

Draw the structures for Bromopentane*

Q 4.1 | Page 69

Draw the structures for Butanone

Q 4.2 | Page 69

Draw the structures for Hexanal

Q 4.3 | Page 69

 How would you name the compounds?

CH3-CH2-Br

Q 5.1 | Page 69

 How would you name the following compound?

Q 5.2 | Page 69

How would you name the following compound?

Q 5.3 | Page 69

Page 71

 Why is the conversion of ethanol to ethanoic acid an oxidation reaction?

Q 1 | Page 71

A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Q 2 | Page 71

Page 74

How would you distinguish experimentally between an alcohol and a carboxylic acid?

Q 1 | Page 74

What are oxidising agents?

Q 2 | Page 74

Page 76

Would you be able to check if water is hard by using a detergent?

Q 1 | Page 76

 People use a variety of methods to wash clothes. Usually after adding the soap, they ‘beat’ the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessary to get clean clothes?

Q 2 | Page 76

Pages 77 - 78

Ethane, with the molecular formula C2H6 has
(a) 6 covalent bonds.
(b) 7 covalent bonds.
(c) 8 covalent bonds.
(d) 9 covalent bonds.

Q 1 | Page 77

Butanone is a four-carbon compound with the functional group

(a) carboxylic acid.
(b) aldehyde.
(c) ketone.
(d) alcohol.

Q 2 | Page 77

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
(a) the food is not cooked completely.
(b) the fuel is not burning completely.
(c) the fuel is wet.
(d) the fuel is burning completely.

Q 3 | Page 77

Explain the nature of the covalent bond using the bond formation in CH3Cl.

Q 4 | Page 78

Draw the electron dot structures for ethanoic acid

Q 5.1 | Page 78

 Draw the electron dot structures for propanone

Q 5.3 | Page 78

Draw the electron dot structures for H2S.

Q 5.3 | Page 78

Draw the electron dot structures for  F2

Q 5.4 | Page 78

What is a homologous series?

Q 6 | Page 78

How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

Q 7 | Page 78

Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?

Q 8 | Page 78

Why are carbon and its compounds used as fuels for most applications?

Q 9 | Page 78

Explain the formation of scum when hard water is treated with soap.

Q 10 | Page 78

What change will you observe if you test soap with litmus paper (red and blue)?

Q 11 | Page 78

What is hydrogenation? What is its industrial application?

Q 12 | Page 78

Which of the following hydrocarbons undergo addition reactions:
C2, H6, C3H8, C3H6, C2H2 and CH4.

Q 13 | Page 78

 Give a test that can be used to differentiate chemically between butter and cooking oil.

Q 14 | Page 78

Describe in brief the cleansing action of soap.

Q 15 | Page 78

NCERT Science Class 10

Science Textbook for Class 10
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