CBSE Class 10 Science Question Paper 2019 Set 07 Solved

CBSE Class 10 Science Question Paper Solved 2019 Set G. 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 the term electrical resistivity of a material.

2. List two main components of an ecosystem.

SECTION B

3. What are ionic compounds ? Why do ionic compounds not conduct electricity in the solid state ?

4. How do auxins promote the growth of a tendril around a support ?

OR

What is a nerve impulse ? State the direction followed by a nerve impulse while travelling in the body of an ganism.

5. Why is the colour of the clear sky blue ?

SECTION C

6. State the effect of concentration of H⁺(aq) ions on the nature of the solution. Do basic solutions also have H⁺(aq) ions ? If yes, then why are these basic ?

7. Out of three metals P, Q and R, P is less reactive than Q and R is more reactive than P and Q both. Suggest an activity to arrange P, Q and R in order of their decreasing reactivity.

OR

Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.

8. ‘‘Atomic number of an element is considered to be a more appropriate parameter than its atomic mass for a chemist.’’ Take the example of the element X (atomic number 13) to justify this statement.

9. List four functions of the human heart. Why is double circulation necessary in the human body ?

10. Explain the ways in which glucose is broken down in absence or shortage of oxygen.

11. List in tabular form three distinguishing features between cerebrum and cerebellum. 

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