Which of the following statements with regard to heating of lead nitrate powder over a flame are correct? 1. Brown fumes of NO2 are released. 2. Colourless O2 gas is released. 3. It is an example of oxidation reaction. 4. It is an example of thermal decom

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Q: 20 (CDS-I/2023)
Which of the following statements with regard to heating of lead nitrate powder over a flame are correct?
1. Brown fumes of NO2 are released.
2. Colourless O2 gas is released.
3. It is an example of oxidation reaction.
4. It is an example of thermal decomposition used for the production of NO2 gas.
Select the correct answer using the code given below.

question_subject: 

Science

question_exam: 

CDS-I