Science sample paper-2009-a

SET-I
SCIENCE PAPER 2009.

Time allowed: 2 & 1/2 hours; Maximum Marks: 60

General Instructions:
1)The question paper comprises of two Sections A and B. You  are to attempt both the sections.
2)All questions are compulsory.
3)There is no overall choice. However, internal choice has been provided in all the three questions of five marks category. Only one option in such questions is to be attempted.
4)All questions of Section A and all questions of Section B are to be attempted separately.
5)Questions 1 to 6 Section A and 17 to 19 in Section B are short questions. These questions carry one mark each.
6)Questions 7 to 10 in Section A and 20 to 24 in Section B are short answer type questions and carry two marks each.
7)Questions 11 to 14 in Section A and 25 to 26 in Section B are also short answer type questions and carry three marks each.
8)Questions 15 and 16 in Section A and question 27 in Section B are long answer type questions and carry five marks each.

SECTION A

Question 1

Make the given equation more informative by writing the symbols of physical states.

Question 2

What is the colour of turmeric in acidic and basic medium?

Question 3

Name a metal whose density is lesser than water.

Question 4

Where does centre of curvature of a spherical mirror lie?

Question 5

Name two important properties of a magnet.

Question 6

How is 1 ohm related to ampere and volt?

Question 7

Suppose you burn a magnesium ribbon of about 2 cm after cleaning it by sand paper and collect ashes in a watch glass.

(i) What is the colour of the flame?

(ii) What is the colour and name of the compound that you have collected in the watch glass?

Question 8

What are indicators? Name four acid-base indicators and mention their colour change in acid and basic solutions.

Question 9

Draw neat ray diagrams to illustrate the formation of images due to a beam of light incident parallel to the principal axis of a (i) concave mirror, (ii) convex mirror in each case.

Question 10

Define a magnetic field of a magnet. What is the direction of the field outside the magnet?

Question 11

Write down the electronic configuration of the first three elements of Group 1.

Question 12

Define the term saturated and unsaturated compounds. Give one example of each.

Question 13

A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. Find the amount of charge that flows through the circuit.

Question 14

Explain the cause of resistance offered by a conductor?

Question 15

Define the term activity series. Write a relative reactivity series of metals. What happens when Zn metal is kept in ferrous sulphate solution?

OR

Several steps are involved in the extraction of pure metals form ores. Summarize these steps in tabular form.

Question 16

Define magnification of image formed by a lens. Derive the formula for magnification using image formation as given below:

(i) Real image from a convex lens,

(ii) Virtual image from a convex lens, and

(iii) Virtual image formed by concave lens.

SECTION B

Question 17

Name the tissue through which water is transported from roots to leaves in plant.

Question 18

What is a renewable source of energy?

Question 19

Name the two hormones secreted by pancreas.

Question 20

How is a solar panel prepared? What is its power output?

Question 21

Name the different constituents of biogas.

Question 22

Give technical terms for following events:

(a) The movement of plant in the direction of light.

(b) Downward movement of roots in response to gravitational force.

(c) Movement of plant parts towards chemical substance.

(d) Plant movement neither towards nor away from stimulus.

Question 23

Name various types of heterotrophic nutrition. Give examples for each type.

Question 24

Name the finger-like projections present on the inner lining of intestine and state their function.

Question 25

Describe the mechanism of breathing in human beings.

Question 26

How is the sex of the offspring determined in human beings?

Question 27

(A) Draw labeled diagram of parts of the flower.

Briefly state the function of each part of the flower

OR

(B) Draw the diagram of human heart . Label the parts.

Describe the functions of the

a) Atria     b) Ventricles  c) Valves