CBSE Class 11 Chemistry Sample Paper Set 20

1. Which of these contain the largest number of atoms – 1.0 g Li(s) and 1g Na(s)?

2. HI is put in a sealed glass bulb and is then heated to decompose HI into H₂ and I₂? What type of system does the reaction mixture represent?

3. What is the difference between a vapour and a gas?

4. Calculate the maximum number of electrons in f subshell with same spin.

5. What is the direction of flow of electrons and of conventional current in the following cell?

6. Give IUPAC name of allyl alcohol.

7. Calculate the pH of 0.001M NaOH.

8. Why is Ga smaller in size than Al?

9. Convert: (a) C and H2 to benzene (b) Calcium carbide to oxalic acid

10.Give reason for the following

         (a) F has lower electron gain enthalpy than Cl.

         (b) Ionization enthalpy of N is higher than O.

11. Arrange the following in increasing order of size. Give reason for your answer.

              Mg²⁺ O^2- Na⁺ F^- Al³⁺

12. The density of 3M solution of NaCl is 1.25g/mL. Calculate the molality of the solution.

13. Which of the two is steam volatile and why? o-nitrophenol or pnitrophenol