CBSE Class 12 Chemistry Question Paper Solved 2019 Set A

CBSE Class 12 Chemistry Question Paper Solved 2019 Set A. 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 type of isomerism is shown by complex [Co(NH₃)5Cl]SO₄ ?

OR

Arrange the following in increasing order of crystal field splitting energy :

Cr(CN)₆]³–, [Cr(NH₃)₆]³+, [CrCl₆]³–

2. Write the IUPAC name of   

3. p-nitrobenzoic acid has lower pk_a value than benzoic acid. Why ?

4. How will you prepare arsenic sulphide sol in the lab ?

OR

Give an example of heterogeneous catalysis.

5. A compound is formed by two elements X and Y. Atoms of the element Y (as anions) make ccp and those of the element X (as cations) occupy all octahedral voids. What is the formula of the compound ?

SECTION B

6. Differentiate between

(a) Nucleotide and Nucleoside

(b) Amylose and Amylopectin

7. What happens when D-glucose is treated with the following ? Give equations to support your answer.

(a) HI

(b) HNO₃

OR

Give any two points of difference between globular and fibrous proteins.

8. What happens when

(a) PCl₅ is heated ? 

(b) XeF₂ reacts with PF₅ ? 

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