# SSLC Chemistry Solution Chapter2 Gas Laws Mole Concept

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 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

### Let us Assess

Qn 1.

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

### Volume (V)

1 atm8 L
2 atm4 L
4 atm2 L

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

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.

b) Boyle's Law

Qn 3.

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

### No.of molecules

Nitrogen10 Lx
Oxygen5 L
Ammonia10 L
Carbon di oxide 2x

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

a)

### No.of molecules

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

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?

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)

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

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 ?

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?

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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