Class 10 Science - Chapter Carbon and Its Compound NCERT Solutions | Explain the mechanism of the cleaning ac

Draw the structure for the following compounds.                

       (i)    Ethanoic acid             (ii)   Bromopentane*
       (iii)  Butanone                   (iv)   Hexanal.

*Are structural isomers possible for bromopentane?

What is an homologous series? Explain with an example.

How would you name the following compounds?

   (i)    CH₃  -- CH₂  -- Br

  (ii)

(iii) 

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

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

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

How many structural isomers can you draw for pentane?

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

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

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

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

What is a good source of energy?

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

What changes can you make in your habits to become more environment-friendly?

What is the difference between a reflex action and walking?

What is the importance of DNA copying in reproduction?

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Why should a magnesium ribbon be cleared before burning in air?

Define the principal focus of a concave mirror.

Name the substance which on treatment with chlorine yields bleaching powder.

Why does the sky appear dark instead of blue to an astronaut?

What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?

Why does distilled water not conduct electricity, whereas rain water does?

Why do you think that there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?

Name two metals which will displace hydrogen from dilute acids, and two metals which will not.

What is the function of digestive enzymes?

A solution turns red litmus blue, its pH is likely to be

  (a) 1          (b) 4          (c) 5          (d) 10

Compare the above system with the probable systems in hilly/mountainous areas or plains or plateau regions.

Explain the meanings of malleable and ductile.