SSLC Chemistry Solution Chapter2 Gas Laws Mole Concept


SSLC Chemistry Solution Chapter2  Gas Laws Mole Concept

 This site provides you valuable notes in the form of a pdf which can be printed out and carried for studies, ideal for students of class X. In the prevailing competitive age, it's quite tough to score good marks in the SSLC science examination even after studying hard for SSLC tenth chemistry textbooks. To make the work easier, students search online to get the chemistry questions and answers pdf file.

Here I am giving a whole series for you guys which is the tenth. I am sharing many sslc solutions. these are my collection form the exams before . here we are giving a complete series of solutions for them in pdf format.

Board SCERT, Kerala
Text Book SCERT Based
Class SSLC 
Subject Chemistry Solution
Chapter Chapter 2
Chapter Name Gas Laws Mole Concept
Category Kerala SSLC

Kerala Syllabus SSLC Class 10 Chemistry Textbook Solution Chapter 2 Gas Laws Mole Concept

Qn 1.

Examine the data given in the table(Temperature and number of molecules of the gas are kept constant).

 Pressure (P)

  Volume (V)

1 atm8 L
2 atm4 L
4 atm2 L

a) calculate PxV.
b) Which is the gas law realated to this?

  • Answer)

    a) 8

    b) Boyle's Law

Qn 2.

Analyse the situations which given below and explain the gas law associated with it.
a) A balloon is being inflated.
b) When an inflated balloon is immersed in water, its size decreases.

  • Answer)

    a) Avagadros Law

    b) Boyle's Law

Qn 3.

Certain data regarding various gases kept under the same conditions of temperature and pressure are given below.


Volume (L)

No.of molecules

Nitrogen10 Lx
Oxygen5 L 
Ammonia10 L 
Carbon di oxide 2x

a) Complete the table.
b) Which gas law is applicable here?

  • Answer)



    Volume (L)

    No.of molecules

    Nitrogen10 Lx
    Oxygen5 Lx/2
    Ammonia10 Lx
    Carbon di oxide20 L2x

    b) Avagadros Law

Qn 4.

a) Calculate the mass of 112L CO2 gas kept at STP ( molecular mass = 44).
b) how many molecules of CO2 are present in it?

  • Answer)

    a) 112 L = 112/22.4

                  = 5 mole

    Mass of 5 mole= 5GMM=5 x 44g= 220g

    b) 5 x 6.022 x 1023

Qn 5.

Calculate the volume of 170g of ammonia at STP? (Molecular mass - 17)

  • Answer)

    170g NH= 170/17

                     =10 mol

    Volume of 10 mol NH=10 x 22.4 = 224 L

Qn 6.

Find out the number of moles of molecules present in the sample given below.
(GMM-N2 = 28g, H2O = 18g)
a) 56g N2

b)90g H20

  • Answer)

    a) 56/28 = 2 mol

    b) 90/18 = 5 mol

Qn 7.

The molecular mass of ammonia is 17.
a) How much is the GMM of ammonia ?
b) Find out the number of moles of molecules present in 170g of ammonia.
c) Calculate the number of ammonia molecules present in the above sample of ammonia ?

  • Answer)

    a) 17g

    b) 170/10 = 10 mol

    c) 10 x 6.022 x 1023

Qn 8.

The molecular mass of oxygen is 32.
a) What is the GMM of O2 ?
b) How many moles of molecules are there in 64g of oxygen? How many molecules        are there in it?
c) Calculate the number of oxygen atoms present in 64g of oxygen?

  • Answer)

    a) 32 g

    b) 2 mol , 2 x 6.022 x 1023

    c) 4 x 6.022 x 1023

SSLC Chemistry Textbook Solution

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