CBSE Class 10 Science Question Paper 2014 Set 3 - Vocational

CBSE Class 10 Science Question Paper 2014 Set 3 - Vocational. Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practiced to get better marks in examinations.

SECTION A

1.Write the name and chemical formula of the simplest alkane.

2.‘‘In a population no two individuals are absolutely alike.’’ Why ?

3.‘‘We should discard our domestic biodegradable and non-biodegradable wastes in two separate dust-bins.’’ Why so ?

4.What is reproduction ? Write the importance of DNA copying in reproduction.

5.You might have observed the heaps of domestic waste decomposing on the roads in cities. Describe in brief what can be done to make people realize that the improper disposal of waste materials is harmful to the environment.

6.Why is sustainable management of natural resources necessary ? Out of the two methods – reuse and recycle, which one would you suggest to practise and why ?

7.What is a covalent bond ? Show the bond formation in a diatomic molecule of oxygen (atomic number 6) and name the covalent bond formed in this case. How is this type of bond represented ?

8.What is meant by structural isomers ? ‘‘We cannot have structural isomers of the first three members of alkane series.’’ Give reason to justify this statement. Draw the structures of any two isomers of pentane, C₅H₁₂.

9.What is a homologous series of carbon compounds ? List any two of its characteristics. Write the name and molecular formula of the next homologue of C₃H₇OH.

10.What is meant by functional group in a carbon compound ? Write the formula of the functional group present in (i) ethanol and (ii) ethanoic acid. Describe a test to distinguish between ethanol and ethanoic acid. 

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper 2014 Set 3 - Vocational.