Question

Q6. How can you show with the help of experiment:
1)Sodium chloride solution is a good conductor of electricity,
2)Iron is more reactive than copper.
3)Exhaled air contains carbon dioxide.​

Answer 1

Answer:

Explanation:

1)Sodium chloride solution is a good conductor of electricity,

To prove this, we need:-

• An Jug
• Brine Solution or salt solution
• Electrodes
• Battery

What we need to do is, insert the electrodes in the Brine solution and then, we will see the electrolysis of NaCl. This will be Na+ and Cl- ions. This shows they are good conductors.

2)Iron is more reactive than copper.

Carrying out an experiment with

• Iron Nail
• Copper Sulphate

$\sf{Fe+CuSO_4 \longrightarrow FeSO_4 + Cu}$

Copper gets displaced and FeSO4 is formed. This shows Iron is reactive than Copper.

Exhaled air contains carbon dioxide.​

For this, we need:-

• Lime water
• A container

Taking a pichkari, we can fill in the air exhaled by us in Lime water. We will observe formation of white precipicate ie $\sf{CaCO_3 + H_2O}$ which only occurs in presence of Carbon dioxide. Hence, exhaled air contains Carbon Dioxide.

Answer 2

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1) Sodium Chloride is a good conductor of electricity

now, prove it :-

• insert electrodes in the brine solution
• we will see electrolysis of NaCl
• this will be Na+ Cl- ion

This means sodium chloride is good conductor of electricity.

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2) Iron is more reactive than copper

now, prove :-

FORMULA :-

Fe + CuSO4 ➣ FeSO(4) + Cu

COPPER GET DISPLACED AND FeSO(4) IS FORMED

It means iron is more reactive than copper

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3) Exhaled air contains carbon dioxide

NOW, PROVE :-

• Take a pichkari
• fill air in it
• we observe formation of white precipicate CaCO(3) + H2O

this means exhaled air contains CO2

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