West Bengal Board of Secondary Education Physical Science Model Question Paper : wbbse.org

Organisation : West Bengal Board of Secondary Education
Exam : Model Question Papers for Madhyamik Pariksha
Document Type : Model Question Papers
Year : 2017
Category or Subject : Physical Science (First Language)

Website : https://wbbse.wb.gov.in/Web/Home?l=Z%2F%2F2JeEw6P%2FkXiUjdLauQg%3D%3D
Download Model Question Paper : https://www.pdfquestion.in/uploads/10956-PHYSCI.pdf

Physical Science Model Question Paper :

Time : 3 Hours 15 Minutes
Marks : First 15 minutes for reading the question paper only)
Full Marks :
** 90 for Regular Candidates
** 100 for External Candidates

Related : West Bengal Board of Secondary Education English Model Question Papers for Madhyamik Pariksha Exam : www.pdfquestion.in/9201.html

Group – A :
1. MCQ type question (All questions are compulsory: 1 15 = 15a
Each of the following questions has four alternatives. Write the correct one.
1.1 Which one of the following does not deplete ozone layer?
(a) NO
(b) N2O
(c) CO2
(d) CFC

1.2 Which of the following is equal to 290K?
(a) 300C
(b) 170C
(c) 00C
(d) 270C

1.3 The molecular weight of methane is 16, which of the following is its vapour density?
(a) 22.4
(b) 8
(c) 16
(d) 32

1.4 Which of the following has the highest thermal conductivity (in cal.cm-1 s-1 K-1 unit)?
(a) Copper
(b) Gold
(c) Iron
(d) Diamond

1.5 For which angle of incidence deviation is minimum during refraction of light from lighter to denser medium?
(a) 600
(b) 700
(c) 900
(d) 450

1.6 Which pair of the following is the two terminal colours in pure spectrum of white light?
(a) Red and violet
(b) Red and green
(c) Violet and orange
(d) Blue and indigo

1.7 Which one of the following is the unit of electric charge?
(a) volt
(b) coulomb
(c) ohm
(d) watt

1.8 What will be the equivalent resistance where two resistances of 3 ohm and 6 ohm are connected in parallel combination?
(a) 3 ohm
(b) 4 ohm
(c) 2 ohm
(d) 1 ohm

1.10 Which one of the following is not a transition element ?
(a) Fe
(b) Co
(c) Ca
(d) Cr

1.11 Which one of the following is an ionic compound ?
(a) HCl
(b) CH4
(c) MgCl2
(d) NH3

1.12 Which of the following is a weak electrolyte ?
(a) CuSO4
(b) KOH
(c) H2SO4
(d) CH3COOH

1.13 Which of the following gases can be prepared by Kipp’s apparatus ?
(a) N2
(b) H2S
(c) HCl
(d) NH3

1.14 Hematite is the one of which of the following metals ?
(a) Copper
(b) Aluminium
(c) Iron
(d) Zinc.

1.15 Which of the following functional groups is present in ethyl alcohol ?
(a) CHO
(b) >C=O
(c) COOH
(d) OH

Group- B :
2. Answer the following questions (Alternatives are to be noted): 1 21 = 21
2.1 In which layer of atmosphere do storm and rain occur?
or
What are the bacteria called which decompose biomass to methane in biogas plant?

2.2 Fill up the blank :
In stratosphere temperature ________ with increase in altitude.

2.3 What is the temperature in 0C at which volume of a gas will be zero at constant pressure according to Charles’ law?
2.4 A gas at fixed temperature is kept in a closed vessel . Some more amount of the same gas is added to the vessel without altering the temperature. What will be the change in pressure?
2.5 What is the SI unit of coefficient of linear expansion of a solid ?
or
Write down the relation among the linear, surface and volume expansion coefficients of a solid.

2.6 What type of spherical mirror is used in the headlight of cars?
2.7 Where will the image be formed when an object is placed at the focus of a convex lens?
2.8 Define the resistance of a conductor according to Ohm’s law.
2.9 What is the SI unit of resistivity?
2.10 From which part of an atom the radioactive rays emanate?
2.12 Which type of electricity is used in electrolysis?
2.13 What is used as electrolyte in the electroplating of gold over silver?
or
Write whether the following statement is true or false:
During electrolysis electrolytes conduct electricity through electrons.

2.14 Write the formula of the precipitate when an aqueous solution of ammonia is added to the aqueous solution of ferric chloride?
or
What is liquor ammonia?
2.15 What change of colour is observed when a few drops of aqueous solution of sodium nitroprusside is added to an aqueous solution of hydrogen sulphide made alkaline with NaOH solution?