WBBSE Madhyamik Exam Physical Science sample question paper in English

Time: 1:30 Hr.                   Monthly Class Test (Sept, 2015)                F.M.: 50

                              Physical Science(X)                                   

(Answer question no. 1 and any five questions from Group-B)

Group-A

1. Answer any ten questions: -1x10=10

1.1 Name an isomer od dimethyl ether?

1.2 Which one is greater among 0⁰C and 0⁰F?

1.3 Find the number of molecules in 1.8 gm of water.

1.4Name the heaviest particle of an atom.

1.5 What is the unit of specific heat?

1.6 What is the value of standard temperature in Absolute Scale?

1.7 How many neutrons are present in ₉₂U²³⁵?

1.8 Give an example of three carbon containing hydrocarbon?

1.9 How many oxygen atoms are present in 1 mole of CO₂?

1.10 Write general formula of alkene.

1.11 Name an atom which do not have any neutron.  

1.12 Name a biomolecule.

1.13 What is the temperature difference between 30^oC and 300K ?

Group-B

(Answer any five questions): 8X3=24

2.1 What is the difference between heat and temperature?  3

2.2 If the increase in temperature in Fahrenheit scale is 72⁰. What will be the difference in Celsius scale?  2

2.3 What is thermal equivalent? Write SI unit. 2+1

3.1 ₁H¹, ₁H², ₁H³ – what is the relation among them? In the nucleus of which of them there is no neutron?  1+1

3.2 What is absolute zero temperature? What is its value in Celsius Scale?

3.3 What is the value of standard pressure? Why are pressure and temperature to be mentioned when the volume of a definite mass of gas is mentioned?  1+2

4.1 Write down the three postulates of Dalton’s Theory. 3

5.2 Write one similarity and one dissimilarity between solar system and atomic structure. 2

4.3 The volume of a given mass of gas is 300 cm³ at 27^oC. What will be its volume if the temperature is lowered to 7^oC provided pressure remains unaltered? 3

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5.1Why convex lens is called converging lens? How real and magnified image is formed by convex lens? 2+2

5.2 Define optical center of a convex lens. 2

5.3 What is pure and impure spectrum?  2

7.1 Write two differences between Covalent and electrovalent compounds.  2

7.2 Among CaO and H₂O, which one is electrovalent and which one is covalent. Write with reasons. ? 2 + 2

7.3 What is covalence?  2

8.1 What happens when ethylene reacts with bromine?   2

8.2 Write two demerits of using polythene.  2

8.3 What is the functional group present in aldehyde? How chloroform is obtained from methane?  1+3

9.1 If two elements A and B have electronic configuration 2,8,7 and 2,8,1. Fill in the gaps. 4

Element	Position in Periodic table		Valancy	Metal/Non- Metal
	Group	Period
A
B

9.2 Write Modern Periodic law. How many groups and periods are there in modern periodic table? 2+1
9.3  What is functional group of aldehyde? 1