CBSE Class 12 Chemistry Question Paper Solved 2019 Set M

CBSE Class 12 Chemistry Question Paper Solved 2019 Set M. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION A

1. What would be the nature of solid if there is no energy gap between Valence band and Conduction band ?

2. Write the main reason for the stability of colloidal sols.

3. When a coordination compound CrCl₃ . 6H₂O is mixed with AgNO₃, two moles of AgCl are precipitated per mole of the compound. What is the structural formula of the coordination compound ?

OR

What is the difference between a complex and a double salt ?

4. Write the IUPAC name of 

5. Write the reaction involved in the Hoffmann bromamide degradation reaction.

OR

Propanamine and N,N-dimethylmethanamine contain the same number of carbon atoms, even though Propanamine has higher boiling point than N,N-dimethylmethanamine. Why ?

SECTION B

6. When dilute ferrous sulphate solution is added to an aqueous solution containing nitrate ion followed by careful addition of concentrated sulphuric acid along the sides of test tube, a brown ring is formed at the interface between the solution and sulphuric acid layers. Which anion is confirmed by the appearance of brown ring ? What is the composition of the brown ring ?

OR

How can you prepare Cl₂ from HCl and HCl from Cl₂ ? Write reactions only. 

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