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RTZF1ER I, 2016-17

SUMMATIVE ASSESSMENT – I, 2016-17

/ SCIENCE

X / Class – X

3 90

Time Allowed : 3 hours Maximum Marks : 90

1.

2.

3.

4. 1 3

5. 4 6 30-30

6. 7 18 50-50

7. 19 24 70-70

8. 25 33

9. 34 36

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. All questions of Section-A and all questions of Section-B are to be attempted separately. 4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in

one word or in one sentence 5. Question numbers 4 to 6 in Sections-A are two marks questions. These are to be answered

in about 30 words each. 6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be

answered in about 50 words each 7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be

answered in about 70 words each. 8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical

skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.

9. Question numbers 34 to 36 in Section-B are questions based on practical skills. Each question is of two marks.

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SECTION-A

1

State the function of alveoli in the lungs.

1

2

Write any one method to induce current in a coil.

1

3

State two steps in the process of generation of electricity from a windmill.

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4

Write the chemical formula of Bleaching powder. How is bleaching powder prepared ? For what purpose is it used in drinking water ?

2

5

(i)

(ii)

Write one example each of : (i) a metal which is so soft that, it can be cut with a knife and a non-metal which is the hardest natural substance. (ii) a metal and a non-metal which exist as liquid at room temperature.

2

6

(i)

(ii)

Give one example for each of the following : (i) Chemotropism (ii) Phototropism

2

7 X

(i)

(ii)

(iii)

A compound 'X' has the property of hardening when mixed with water. This compound is prepared from gypsum. (i) Identify the compound and write the chemical name of gypsum. (ii) Write the chemical equation for its preparation. (iii) List any two uses of this compound.

3

8

3 2(s) (s) 2(g) 2(g)Pb(NO ) PbO NO O

(i) NO2

(ii)

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(iii)

Consider the following reaction Heat

3 2(s) (s) 2(g) 2(g)Pb(NO ) PbO NO O

(i) Write the name and the colour of the NO2 gas formed.

(ii) Balance the above chemical equation. (iii) Name the type of chemical reaction.

9

Al, Zn, Cu, Fe, Mg Describe an activity to show how the following metals can be arranged in the decreasing order of reactivity with dil sulphuric acid : Al, Zn, Cu, Fe, Mg

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10

On passing excess carbon dioxide gas through lime water, it first turns milky and then becomes colourless. Explain why? Write all the chemical equations of the reactions involved.

3

11

On touching a hot plate, we suddenly withdraw our hand. List two categories of neurons that become active. Describe this process.

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12

Describe double circulation in human beings. Why is it necessary ?

3

13

Draw a diagram showing the correct positions of pancreas, thyroid gland, pituitary gland, Adrenal gland in human being.

3

14

(i)

(ii)

(iii)

How will the resistance of a wire change when : (i) its length is doubled. (ii) its diameter is doubled. (iii) its temperature is increased.

3

15 (a)

(b)

(a) A current carrying conductor is placed perpendicular in a magnetic field. Name the rule which can be used to find the direction of force acting on the conductor. (b) State two ways to increase the force an a current carrying conductor in a magnetic field.

3

16 220 V 5 A 3

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6.0

An electric heater is used on 220 V supply and takes a current of 5 A. What is its power ?

Calculate the per hour cost of using the heater if 1 unit costs. Rs. 6.0.

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(i) (ii)

(iii)

Megha asked her mother to install a solar water heater on the roof top. Her mother asked about the need of such installation. Megha convinced her mother and succeeded in setting up a solar water heater on her roof top. (i) State one advantage of installing the solar water heater to Megha’s family and to the society. (ii) What qualities of Megha are reflected in her action ? (iii) State one limitation in using solar water heater.

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18

Explain how hydro electricity is produced?

3

19 (a)

(b)

(c)

(a) Define corrosion, what name is given to the corrosion of iron ? (b) Name the colour of coating formed on silver and copper articles, when exposed to air ? (c) List two damages caused by corrosion and suggest how corrosion can be prevented.

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20 (a)

(b)

(a) Illustrate an activity to investigate whether all compounds containing hydrogen are acidic. (b) What happens when hydrochloric acid and sodium hydroxide are dissolved in water. Explain giving equation of each.

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21 (a)

(b)

(i) (ii)

(iii) (iv)

(c)

(i)

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(ii)

(a) “Bile does not contain any enzyme, but it is essential for digestion”. Explain the statement and write two functions of bile. (b) Name the organs which secrete the following enzymes in human digestive system. (i) Pepsin (ii) Salivary amylase (iii) Trypsin (iv) Lipase (c) Name the organs which perform the following functions in human alimentary canal. (i) Absorption of digested food. (ii) Absorption of water

22 V I

State Ohm's law. Draw graph between V and I for a metallic conductor. Define resistivity with unit. What is the effect of temperature on the resistivity of metals?

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23 (a)

(b)

(a) Name two safety measures commonly used in an electric circuit and appliances. (b) What precaution should be taken to avoid the overloading of domestic electric circuits ?

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24 SI

(i)

(ii)

What is meant by resistance of a conductor ? Name and define its SI unit. List the factors on which the resistance of a conductor depends. How is the resistance of a wire affected if - (i) its length is doubled, (ii) its radius is doubled ?

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/ SECTION - B

25 pH pH

(a) (b)

(c) (d)

A student puts a few drops of an unknown solution on the pH strip, the colour of pH strip changed to violet. The solution taken is likely to be : (a) dil hydrochloric acid (b) dil sodium hydroxide (c) dil ethanoic acid (d) water

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26 'A' pH 'A'

(a) NaOH (b)

(c) (d)

Shruti placed a drop of solution 'A' on a strip of pH paper and a deep blue colour was produced. The

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solution 'A' is of : (a) dil NaOH solution (b) dil hydrochloric acid (c) water (d) dil ethanoic acid

27

(a) (b)

(c) (d)

In which form zinc metal is used from laboratory to prepare hydrogen ? (a) Rod (b) Powder (c) Filing (d) Granules

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28 P, Q, R, S

(a) P (b) Q (c) R (d) S Four metal rods labelled as P, Q, R and S along with their corresponding colours are shown below. Which of these rod could be made up of aluminium ?

(a) P (b) Q (c) R (d) S

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29

20

(a)

(b)

(c)

(d)

Solutions of ferrous sulphate, zinc sulphate, copper sulphate and aluminum sulphate were separately taken in four test tubes and two iron nails were added in each one of them. After 20 minutes it would be observed that the colour of : (a) Solutions of zinc sulphate and aluminium sulphate only changed. (b) Solution of only zinc sulphate changed. (c) Copper sulphate solution only changed. (d) Solutions of zinc sulphate, copper sulphate and aluminium sulphate changed and that of ferrous sulphate did not change.

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30 R1 R2 (R1>R2)

I1, I2, I3

1

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(a) I1>I2>I3 (b) I1<I2<I3

(c) I1I2I3 (d) I1<I3>I2

A student connected two resistors R1 and R2 (R1>R2) in series as shown in circuit diagram.

Three Ammeters A1, A2 and A3 are connected as shown in figure to measure electric currents

I1, I2 and I3 at different places.

The correct result is : (a) I1>I2>I3 (b) I1<I2<I3

(c) I1I2I3 (d) I1<I3>I2

31

I II

(a) I II R1 R2

(b) I II R1 R2

(c) I R1 R2 II

(d) I R1 R2 II

A student observes the given circuit diagrams and writes observations as follows :

I II Correct observation is : -

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(a) Resistances R1 and R2 are connected in parallel in both circuit diagrams I and II.

(b) Resistances R1 and R2 are connected in series in both circuit diagrams I and II.

(c) Resistances R1 and R2 are connected in series in circuit I and in parallel in circuit II.

(d) Resistances R1 and R2 are connected in parallel in circuit I and in series in circuit II.

32

(a)

(b)

(c)

(d)

On completion of the experiment to demonstrate that “light is necessary for photosynthesis”, four students reported the inference as follows. Identify the correct inference. (a) Part of the leaf covered with strip can only undergo photosynthesis (b) Uncovered parts of the leaf cannot synthesize starch (c) Photosynthesis takes place only in the presence of sunlight (d) Light is necessary for synthesis of starch in green plants

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33 CO2

(a)

(b)

(c) O2

(d) CO2

In the experimental to show that 'CO2 is given out during respiration,' the seeds that are taken

are germinating seeds because : (a) germinating seeds show photosynthesis (b) germinating seeds are big and softer than dry seeds (c) germinating seeds respire and release O2

(d) germinating seeds respire and release CO2

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34

(i)

(ii)

(iii)

In a laboratory to study :(i) combination reaction (ii) decomposition reaction and (iii) double displacement reaction.

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Following chemicals are available in solid form Calcium oxide, Ferrous sulphate, Barium chloride, Sodium sulphate. Mention which chemicals will be used in solid form and which chemicals will be used in aqueous form.

35 (I) (V)

Explain how we connect an ammeter and a voltmeter in a circuit while performing experiment for studying the dependence of current (I) on potential difference (V) across a resistor?

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36

State where are stomata ideally located. Are they cellular structures ?

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