Back

CBSE X
Set -3
SCIENCE PAPER 2010

Time allowed: 150 minutes; Maximum Marks: 60

 General Instructions: 1) All questions are compulsory. 2) The question paper consists of 28 questions divided into 4 sections A, B, C and D. Section A comprises questions of 01 mark each, Section B comprises questions of 02 marks each, Section C comprises questions of 03 marks each and Section D comprises questions of 05 marks each. 3) All questions in Section A are to be answered in one word, one sentence or as per the exact requirement of the question. 4) There is no overall choice. However, internal choice has been provided wherever necessary.You have to attempt only one of the alternatives in all such questions. 5) In question on construction, drawing should be near and exactly as per the given measurements. 6) Use of calculators is not permitted.
SECTION A

 Section A Section B Section C Section D

### Question 1

1. Name the part of our eyes that helps us to focus near and distant objects in quick succession.

### Question 2

2. The outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror. What will be the focal length of this mirror? Which type of spherical mirror will it provide?

### Question 3

3.

What is nature of the image formed by a concave mirror if the magnification produced by the mirror is + 4?

### Question 4

4.

A charged particle enters at right angles into a uniform magnetic field as shown. What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interaction with the magnetic field?

### Question 5

5. On what basis is a chemical equation balanced?

### Question 6

6. State two characteristic features of carbon which when put together give rise to a large number of carbon compounds.

### Question 20

20. Name the hormone that helps in regulating level of sugar in our blood. Name the gland that secretes it.

### Question 21

21. A person lives near a forest. Make a list of four items which he can get from the forest to meet his daily needs.

### Question 22

22. Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to?

 Section A Section B Section C Section D
X