Class 10 Science - Chapter Carbon and Its Compound NCERT Solutions | A mixture of oxygen and ethyne is burnt

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?

Explain the mechanism of the cleaning action of soaps.

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.

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.

Which one of the following materials cannot be used to make a lens?

(a) Water        (b) Glass        (c) Plastic        (d) Clay

Only variations that confer an advantage to an individual organism will survive in a population. Do you agree with this statement? Why or why not?

(i) Write the electron-dot structures for sodium, oxygen and magnesium.

(ii) Show the formation of Na₂O and MgO by the transfer of electrons.

(iii) What are the ions present in these compounds?

Find the focal length of a convex mirror whose radius of curvature is 32 cm.

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

State two ways to prevent the rusting of iron.

What happens at the synapse between two neurons?

Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.

(a)  What property do all elements in the same column of the Periodic Table as boron have in common?
(b)  What property do all elements in the same column of the Periodic Table as fluorine have in common?

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?