CBSE Class 10 Science Question Paper Solved 2019 Set K

CBSE Class 10 Science Question Paper Solved 2019 Set K. 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. Define current. Give its S.I. unit.

2. Name the component of sunlight which facilitates drying of wheat after harvesting.

SECTION B

3. State laws of refraction of light.

OR

List four characteristics of the image formed by a concave mirror of focal length 40 cm when the object is placed in front of it at a distance of 20 cm from its pole.

4. Draw magnetic field lines in and around a current carrying straight solenoid.

5. Write the name and molecular formula of a carbon compound having its name suffixed with ‘‘-ol’’ and having two carbon atoms in its molecule. With the help of a chemical equation indicate what happens when this compound is heated with excess conc. H₂SO₄.

SECTION C

6. Define the term evolution. ‘‘Evolution cannot be equated with progress.’’ Give examples to justify this statement.

7.  (a) Plants do not have any nervous system but yet, if we touch a sensitive plant, some observable changes take place in its leaves. Explain how could this plant respond to the external stimuli and how it is communicated.

(b) Name the hormone that needs to be administered to

(i) increase the height of a dwarf plant.

(ii) cause rapid cell division in fruits and seeds.

8. (a) Write the function of the following in the human alimentary canal :

(i) Saliva

(ii) HCl in stomach

(iii) Bile juice

(iv) Villi

(b) Write one function each of the following enzymes :

(i) Pepsin 

(ii) Lipase 

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