TRIBUNNEWS.COM – The following is problems example Semester Final Examination (UAS) or Semester Final Assessment (PAS) for Chemistry class 11 SMA semester 1.

Problems example UAS or PAS The following consists of multiple choice questions accompanied by an answer key.

Multiple choice

1. The mixture of the following solutions that can form a buffer mixture is …..

A. HCl solution with NH4Cl solution
B. CH3COOH solution with C6H5COOK solution
C. C2H5OH solution with C2H5ONa solution
D. Ca(OH)2 solution with CaCl2 solution
E. HCOOH solution with HCOONa solution

Answer: E

2. Which of the following mixtures can form a buffer solution is …..

A. 100 mL of 0.1 M NaOH + 100 mL of 0.1 M HCl
B. 100 mL of 0.1 M NaOH + 100 mL of 0.1 M NaCN
C. 100 mL of 0.1 M NaCN + 100 mL of 0.1 M HCN
D. 100 mL of 0.1 M NH4OH + 50 mL of 0.1 M H2SO4
E. 100 mL of 0.1 M K2SO4 + 50 mL of 0.1 M H2SO4

Answer: D

3. Equilibrium that occurs in the reaction chemical is a dynamic equilibrium. This shows that…..

A. The rate of formation of products is not the same as the rate of formation of reactants
B. Microscopically the reaction stops and the concentration of the substances remains constant
C. There is always a change towards the products and a change back into the reactants
D. Macroscopically, the reaction is continuous and the concentration remains constant
E. The concentration of the reactants is the same as the concentration of the products.

Answer: E

Also read: Example of UAS Questions, Class 7 Middle School Semester 1 Handicraft PAS: Multiple Choice and Answer Keys

4. As much as 4 moles of N2O4 gas is heated in a room so that 50 percent dissociates to form NO2 gas with the following reaction:
N2O4 (g) ⇄ 2 NO2 (g)
If it is known that the total pressure of the mixture is 5.5 atm then the value of Kp at that temperature is …..

B. 6
C. 8
E. 12

#UAS #Questions #PAS #Chemistry #Class #SMA #Semester #Multiple #Choice #Answer #Key