Question

. 2 NaHCO + Heat----> Na + H2O + CO2. Which type of reaction it is? How can we
recognise that CO, has released ?​

Answer 1

Answer:

thermal decomposition reaction as it is a combustion

Answer 2

Correct Question:

$\large{\bold{2 \; NaHCO_3 \xrightarrow{Heat} 2 \; Na + 2 \; H_20 +2 \; CO_2}}$  Which type of reaction it is? How can we  recognise that CO₂ has released ?​

Answer:

• Thermal Decomposition Reaction.

Explanation:

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The Given Reaction is,

$\large{\bold{2 \; NaHCO_3 \xrightarrow{Heat} 2 \; Na + 2 \; H_20 +2 \; CO_2}}$

This type of Reaction is Decomposition Reaction as A Compound (NaHCO₃) Breaks to give two (Or) More than Two compounds(H₂O & CO₂).

And as From Reaction we Can make out that the reaction is taking place when Heat is supplied.

Therefore, The Reaction is Thermal decomposition Reaction.

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We Can Detect the presence of CO₂ By Two Methods.

1st Method:-

• When Gas is Evolved, If we Keep A Burning Matchstick Over it. The Flame Puts off due to CO₂. As CO₂ Doesn't supports Burning.
• This Proves that the Gas Released is CO₂.

2nd Method:-

• When Gas is Evolved, If we Connect a tube and pass the released gas in to Calcium Hydroxide Solution [Ca(OH₂)] the solution gets colourless  & we can see a white precipitate formed (CaCO₃).
• This Proves that the Gas released is CO₂.

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