CBSE Class 12 Chemistry Question Paper Solved 2019 Set K

CBSE Class 12 Chemistry Question Paper Solved 2019 Set K. 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.

1. Name the defect in the following crystal :

2. 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 ?

3. Define associated colloid with an example.

4. Why is t-butyl bromide more reactive towards SN1 reaction as compared to n-butyl bromide ?

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. Give reasons for the following :

(a) Aquatic species are more comfortable in cold water than warm water.

(b) At higher altitudes people suffer from anoxia resulting in inability to think.

OR

What type of azeotropic mixture will be formed by a solution of acetone and chloroform ? Justify on the basis of strength of intermolecular interactions that develop in the solution.

7. Explain with a graph, the variation of molar conductivity of a strong electrolyte with dilution. 

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