CBSE Class 10 Science Question Paper Solved 2019 Set E

CBSE Class 10 Science Question Paper Solved 2019 Set E. 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. Write two advantages associated with water harvesting at the community level.

2. Should the resistance of a voltmeter be low or high ? Give reason.

SECTION B

3. Draw electron dot structure of carbon dioxide and write the nature of bonding between carbon and oxygen in its molecule.

OR

List two properties of carbon which lead to the huge number of carbon compounds we see around us, giving reason for each.

4. Give reason :

(a) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

(b) Aluminium is a highly reactive metal; still it is widely used in making cooking utensils.

5. The power of a lens is +5 diopters. What is the nature and focal length of this lens ? At what distance from this lens should an object be placed so as to get its inverted image of the same size ?

SECTION C

6. List two types of the transport system in human beings and write the functions of any one of these.

7. Distinguish between pollination and fertilisation. Mention the site and the product of fertilisation in a flower.

8. What is transpiration ? List its two functions.

OR

(a) What is translocation ? Why is it essential for plants ?

(b) Where do the substances in plants reach as a result of translocation ?

9. A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.

(a) What should he do to burn the paper ?

(b) Which type of mirror does he have ?

(c) Will he be able to determine the approximate value of focal length of this mirror from this activity ? Give reason and draw ray diagram to justify your answer in this case.

OR

A 10 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 12 cm. The distance of the object from the lens is 18 cm. Find the nature, position and size of the image formed.

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