Question

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1.Write two observation when lead nitrate is heated in test tube ?

2. Name the types of reaction?

3. Write a balanced equation to represent the above reaction?
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Answer 1

Answer:

1st answer-- Given that lead nitrate, having chemical formula Pb(NO3)2 is heated in a test tube. The two observations of this chemical reaction are: (i) When lead nitrate is heated, it decomposes into lead oxide (PbO), nitrogen dioxide (NO2), and oxygen gas (O2). The type of this reaction is thermal decomposition reaction.

2nd answer-- The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories.

3rd answer-- CaCO3+2HCI---> CaCI2+H2O+CO2

Explanation:

third answer- CaCO and 3 is very small +2HCI is right --->CaCI and 2 is in small + H than 2 is small O+ CO and 2is small

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Answer 2

Answer:

$\huge\fbox \red{A}\fbox \green{N}\fbox \purple{S}\fbox \orange{W}\fbox \blue{E}\fbox \green{R}$

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1. The two observations of this chemical reaction are:-

• When lead nitrate is heated, it decomposes into lead oxide (PbO), nitrogen dioxide (NO2), and oxygen gas (O2).

• it decomposes to produce light yellow solid lead monoxide, reddish-brown nitrogen dioxide gas and colourless oxygen gas.

2. The type of this reaction is thermal decomposition reaction.

3. 2Pb ( No3 )2 (s) = 2PbO (s) + 4NO2 (g) + O2 (g)

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