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.

Why is respiration considered an exothermic reaction? Explain.

If a woman is using a copper -T, will it help in protecting her from sexually transmitted diseases?

Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?

What will happen if a solution of sodium hydrocarbonate is heated? Give the equation of the reaction involved.

What happens to the image distance in the eye when we increase the distance of an object from the eye?

An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be

(a) calcium
(b) carbon
(c) silicon
(d) iron.

What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?

How can you help in reducing the problem of waste disposal? Give any two methods.

Find out about the traditional systems of water harvesting/management in your region.

Use the data in Table 12.2 to answer the following –

(a) Which among iron and mercury is a better conductor?
(b) Which material is the best conductor?