Madhyamik Physical Science Question

Madhyamik Physical Science Question 2017

Madhyamik, the Class 10 School leaving examination, is conducted by the West Bengal Board of Secondary Education (W.B.B.S.E.) every year. The examination is held in the month of February 2017. Each paper started on each day from 11.45 A.M to 3.00 P.M

Here is provided Physical Science question paper 2017. Full Marks is 90 for Regular candidates and 100 for the External Candidates. Time duration is Three Hours Fifteen Minutes.

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2017

Physical Science

(For Regular & External Candidates)

Time; Three Hours Fifteen Minutes

(First fifteen minutes for reading the question paper)

	90 – For Regular Candidates
	100 – For External Candidates

Special credit will be given for answers which are brief and to the point. Marks will be deducted for spelling mistakes, untidiness & bad handwriting.

Only External candidates’ will answer Group E.

Figures in the margin indicate full marks for each question.

Group “A”

1 1. Multiple choice questions. Four alternatives are given as answer for each of the following questions. Write the correct ones. 1x15= 15

1 1.1 Which of the following is not a Green House Gas?

(a) Methane (b) Water Vapour

1.2 Which of the following is S.I unit of Pressure?
(a) Nm² (b) Nm^-2 (c) Nm (d)N

1 1.3 Vapour density of a gas is 32. Which of then following is its

molecular weight?

(a) 8 (b) 16 (c) 32 (d) 64
1.4 On which of the following does the thermal conductivity of a

metal depends

(a) Temperature (b) Length

( (c) Nature of Material (d) Area odd cross section

1.5 What is the relation between the radius of curvature and the

focal length of mirror?

(a) F = 2r (b) f = r/2 (c) f = r/3 (d) f = ³/₂ r

1.6 Which of the following colour deviates most when white light
is refracted by a prism?

(a) Red (b) Yellow (c) Violet (d) Green

1.7 Which of the following physical quantity represents ampere?

(a) Count-Second (b) Volt.ohm^-1

1.8 Resistivity of which of the following decreases with increase
in temperature.

(a) Conductor (b) Semi-conductor

1 1.9 Which of the following is the correct order of ioning power of

α, β, y rays

(a) α> β > γ (b) α> γ > β (c) γ > β > α (d) γ > α> β

1 1.10 Which of the following has the highest atomic radius?

(a) K (b) H (c) Li (d) na

1 1.11 In which of the following a covalent bond is present?

(a) Hydrogen Chloride (b) Sodium chloride

1 1.12 Which of the following is weak electrolyte in aqueous

solution.

(a) CH₃COOH (b) NaOH

1 1.13 Which of the following is used to dry most ammonia?

(a) Conc H₂SO4 (b) P₂O₅ (c) CaO (d) CaCl₂

1 1.14 Which of the following is an ore of aluminum?

(a) Bauxite (b) Hematite (c) Malachite (d) Chalcopyrite

1 1.15 Which of the following is the functional group of aldehyde?

(a) –OH (b) –CHO (c) –C (d) –COOH

Group-B

2 2. Answer the following questions. Alternative are to be noted.

Fill in the blanks;.

2.1 In troposphere temperature ____with increases in altitude. 1

Mention one harmful effect of global warming. 1

2.2 Which atom released from a chlorofloro carbon under the

influence of the U.V rays decomposes ozone into

oxygen? 1

2.3 Write whether the following statement is true of false. 1

2.4 Write down the relation between the pressure and volume of a

given mass of gas according to Boyle’s Law when temperature

remains constant. 1

2.5 Between apparent and real expansion co efficient of a liquid

which one is its own characters. 1

What is the S.I unit of Thermal conductivity? 1

2.6 Give a natural example of dispersion of light. 1

2.7 Which type of lens can rectify myopic vision? 1

2.8 What will be the change in motion of a Barlow’s wheel if the

direction of the current is reversed? 1

2.9 How much work has been done when 1 columb of charge is

taken against a potential difference of 1 volt? 1

2.10 From which part of a radioactive atom is β particle emitted.

Or,

What is the atomic number of the daughter element produced if a ἁ particle is emitted from ₉₂U^{238? 1}

2.11 Match the following right column with left column. 1x4=4

A		B
2.11.1	A transition element	Aluminum
2.11.2	A transurium element	Nickel
2.11.3	Reduces Fe2O3 at high temp	Tin
2.11.4	Present in the allow Bell metal.	Plutonium

2.12 Draw Lewis dot diagram of F2 molecule (F = 9) 1

2.13 Why the electrical conductivity of the solution produced by

adding little Sulphuric acid into pure water is more than

the electrical conduction of pure water? 1

OR,

Which is the career of electricity in evolution during the electrolysis of an aqous solution of an electrolyte? 1

2.14 Which ions migrate towards the cathode during the

electrolysis of CuSO₄ using Cu-electrode? 1

2.15 Write down the formula of the black precipitate formed when
H₂S gas is passed through an aqueous solution of lead
nitrate.

Or,

What change of colour is observed when H₂S gas is passed through an acidified aqous solution of potassium dichromate?

2.16 Two substances are used in the production or urea. One is

ammonia, what is other? 1

2.17 Mention one use of Polyvinyl chloride. 1

2.18 Write down the IUPAC name of CH₃CH₂CH₂OH. 1

Or,

Write down the constitutional formula of an isomer of CH₃CH₂OH. 1

Group C

3. Answer the following questions 2x9=18

3.1 What is meant by Calorific value of fuel? Between Coal and

Diesel which has greater calorific value?

3.2 If the volume of a given mass of a gas at STP is 52m³? What
will be its volume at the pressure of 104 cm/Hf, temperature

remaining constant?

3.3 How does the refractive index of a medium depend of the

velocity of light?

3.4 Mention two advantages of using a CFL lamp over an
incandescent lamp.

3.5 An aqous solution of sugar cannot conduct electricity but an

aqous solution of Sodium Chloride can.

3.6 Compare the following two properties of Naphthalene and

Sodium chloride.

3.7 Name a gas which can be prepared in Kipp’s apparatus. Write
the balanced chemical equation of the reaction for the
preparation of gas.

3.8 How metallic zinc is obtained from zinc oxide? Write the

reaction with balance chemical.

3.9 Show with the help of structure formula of ethylene that is an

unsaturated hydrocarbon.

What is Denatured Spirit?

Group D

4. Answer the following questions (alternatives are to be noted)

4.1 State Charles’s law related to gas and represents it
graphically.

4.2 How many grams of ammonium sulphate will be prepare 6.8

gm of ammonia by heating ammonium chloride with caustic

soda solution.

Or,

CaCl₂, CO₂ and H₂O are produced by the reaction of dilute HCl with CaCO₃. How many gram of HCl will be required to prepare 55.5 gm of CaCl₂, 22gm, CO₂ and 9 gm of H₂O from 50 gm of CaCO₃, What is the number of mole of HCl required? (H=1, Cl=35.5)

4.3 What is the volume expansion of gas at fixed pressure? What
is its value?

Or,

Mention two similarities between heat conduction and electrical conduction. Mention a non-metal having high thermal conductivity.

4.4 State two refraction of light write also the mathematic form of

the second law.

4.5 In case of a concave mirror find the relationship between
focal length and radius of curvature.

Or,

A ray of light passes through a prism. Show that the angle of deviation 8= l₁+ l₂ - < A

4.6 Write Faraday’s Laws of electromagnetic induction. What is

meant by alternating current?

4.7 An electric bulb of resistance 440 ohm is connected to 220v
mains for 10 hours. Find the amount of electrical energy
consumed in B.O.T.

Or,

A metal wire of resistance 6 ohm is stretched so that its length becomes double of its original length. What would be the final resistance?

4.8 What is meant by defect? What is the source of energy
released in nuclear fusion?

4.9 Write with an example what is meant by periodic property of

elements? Mention a property which is not periodic?

Or,

What is meant by electro-negativity of an element? How does electro-negativity of group 1 elements of the long periodic table change from top to bottom.

4.10 Which energy is responsible for the chemical reaction to

occur during electrolysis? What reaction does occur at the

cathode and anode during electrolysis of acidulated water?

4.11 Write balanced chemical equations for the industrial

manufacture of SO₃ from SO₂ by the contact process. How is

H2SO4 prepared by SO₃ so produced?

4.12 Write balanced chemical equation of addition reaction of

hydrogen with acetylene. Mention condition of reaction.

Mention one use of LPG.

Or,

How would you convert? CH₃CH₂OH → CH₂ = CH₃. How is biopolymer protein biodegraded in nature?

Group E

(For External Candidate only)

5. Answer the following question: ( any four) 1x4=4

5.1 What is the main constitution of biogas?

5.2 What is the S.I unit of electric charge?

5.3 How many elements are there in the third period of the long

periodic table?

5.4 What is the radioactive ray that is not made up of particles?

5.5 What is the industrial source of CNG?

6. Answer the following questions: (Any three) 1x3=3

6.1 What is the absolute scale of temperature?

6.2 Mention advantage of A.C over D.C.

6.3 Write with chemical equation what happens when an aqous

solution of ammonia is added to an aqous solution of ferric

chloride.

6.4 Write with balanced chemical equation what happens when

methane under goes combustion in oxygen.

Madhyamik Physical Science Question