CBSE Class 10 Science Question Paper Solved 2019 Set F

CBSE Class 10 Science Question Paper Solved 2019 Set F. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION A

1. Why does the cord of an electric oven not glow while its heating element does ?

2. Although coal and petroleum are produced by the degradation of biomass, yet we need to conserve these resources. Why ?

SECTION B

3. What is atmospheric refraction ? List two phenomena which can be explained on the basis of atmospheric refraction.

4. Name a metal of medium reactivity and write three main steps in the extraction of this metal from its sulphide ore.

5. List two chemical properties on the basis of which ethanol and ethanoic acid may be differentiated and explain how.

OR

Unsaturated hydrocarbons contain multiple bonds between two carbon atoms and these compounds show addition reactions. Out of saturated and unsaturated carbon compounds, which compounds are more reactive ? Write a test to distinguish ethane from ethene.

SECTION C

6. What happens to a beam of white light when it gets refracted through a glass prism ? Which colour deviates the most and the least after refraction through a prism ? What is likely to happen if a second identical prism is placed in an inverted position with respect to the first prism ? Justify your answer.

OR

A student needs spectacles of power – 0·5 D for the correction of his vision.

(i) Name the defect in vision the student is suffering from.

(ii) Find the nature and focal length of the corrective lens.

(iii) List two causes of this defect.

7. Define a food chain. Design a terrestrial food chain of four trophic levels. If a pollutant enters at the producer level, the organisms of which trophic level will have the maximum concentration of the pollutant in their bodies ? What is this phenomenon called ?

8. What are solar cells ? Explain the structure of solar panel. List two principal advantages associated with solar cells. 

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper Solved 2019 Set F.