Chemistry group 33

#BREAKING❗️ የዒድ አልፈጥር በዓል አርብ (ጁምዓ) ይውላል። ዛሬ የሸዋል ወር ጨረቃ ባለመታየቷ 1447ኛው የዒድ አልፈጥር በዓል ከነገ ወዲያ አርብ (ጁምዓ) ተከብሮ ይውላል። ዒድ ሙባረክ ! ▬▬▬▬◈◈◈▬▬▬▬ ➲ @chemistry_group33 ▬▬▬▬◈◈◈▬▬▬▬

ፈተና ጥሩ ለመስራት የቱ ይጠቅማቹሃል?

የሳዑዲ አረቢያ ጠቅላይ ፍርድ ቤት እንደገለጸው ዛሬ ረቡዕ አመሻሽ ላይ የሸዋል ወር ጨረቃ ፍለጋ ይካሄዳል። ዛሬ ጨረቃ ከታየች የዒድ አልፈጥር በዓል ነገ ሐሙስ ይውላል። ዛሬ ጨረቃ ካልታየች ነገ ሐሙስ የረመዷን 30ኛው ቀን ሆኖ ይውላል ፤ በዓሉ ደግሞ አርብ ይውላል። ▬▬▬▬◈◈◈▬▬▬▬ ➲ @chemistry_group33 ▬▬▬▬◈◈◈

የ12ኛ ክፍል ብሔራዊ ፈተና ምዝገባ እየተካሄደ እንደሚገኝ ተገለጸ። የ2018 የትምህርት ዘመን የ12ኛ ክፍል ሀገር አቀፍ ፈተና ምዝገባ እየተካሄደ መሆኑን የትምህርት ምዘናና ፈተናዎች አገልግሎት አስታውቋል። ተፈታኞች በተቀመጠው የጊዜ ገደብ ውስጥ ምዝገባ ማካሄድ እንዳለባቸው ያሳሰበው አገልግሎቱ፤ በተለይም በግላቸው በድጋሚ የሚፈተኑ ተፈታኞች https://register.eaes.et በሚለው የራስ-አገዝ ማስፈንጠሪያ (Link) በመጠቀም መመዝገብ እንደሚኖርባቸው ገልጿል። አስፈላጊውን ምዝገባ ያላከናወነ ማንኛውም ተማሪ በፈተናው ላይ መሳተፍ የማይችል መሆኑን መሥሪያ ቤቱ አሳስቧል። ▬▬▬▬◈◈◈▬▬▬▬ ➲ @Astu2018 ▬▬▬▬◈◈◈▬▬▬▬

Hi akkam jirtu hundii keessan Link siinif ergamu hin tuqina hack naa jala taheti

Hi

CHEMISTRY MOST COMMON PART OF EXAM : CHEMICAL KINETICS ▎Questions: on CHEMICAL KINETICS 1. What is the rate of a chemical reaction?    a) The change in concentration of reactants over time     b) The change in temperature over time     c) The change in pressure over time     d) The change in volume over time  2. Which of the following factors does NOT affect the rate of a chemical reaction?    a) Concentration of reactants     b) Temperature     c) Catalyst presence     d) Color of reactants  3. In a first-order reaction, if the concentration of the reactant is doubled, what happens to the rate of the reaction?    a) It remains the same     b) It doubles     c) It quadruples     d) It decreases  4. What is the unit of the rate constant (k) for a second-order reaction?    a) M/s     b) M²/s     c) 1/M·s     d) M/s²  5. Which of the following statements about catalysts is true?    a) They are consumed in the reaction     b) They increase the activation energy     c) They provide an alternative pathway with lower activation energy     d) They change the equilibrium position of a reaction  6. The Arrhenius equation relates which of the following?    a) Temperature and pressure     b) Rate constant and concentration     c) Activation energy and temperature     d) Reaction rate and catalyst concentration  7. What is the effect of increasing temperature on most chemical reactions?    a) Increases the rate of reaction     b) Decreases the rate of reaction     c) Has no effect on the rate of reaction     d) Changes the equilibrium constant  8. For a zero-order reaction, how does the concentration of reactant affect the rate?    a) Rate is directly proportional to concentration     b) Rate is inversely proportional to concentration     c) Rate is independent of concentration     d) Rate decreases exponentially with concentration  9. Which of the following methods can be used to determine the order of a reaction?    a) Integrated rate laws     b) Half-life method     c) Method of initial rates     d) All of the above  10. In a reaction mechanism, what is an intermediate?     a) A reactant that is present at the beginning      b) A product that is formed in one step and consumed in another      c) A catalyst that speeds up the reaction      d) A transition state  11. What does the term "half-life" refer to in kinetics?     a) Time taken for half of the reactant to be converted to product      b) Time taken for half of the product to be converted back to reactant      c) Time taken for half of the catalyst to be consumed      d) Time taken for half of the solvent to evaporate  12. Which of the following is characteristic of a first-order reaction?     a) Rate = k[A]²      b) Rate = k[A]      c) Rate = k[A][B]      d) Rate = k  13. What happens to the rate of reaction when a catalyst is added?     a) The rate decreases      b) The rate remains unchanged      c) The rate increases      d) The rate fluctuates  14. In which type of reaction does the rate depend on both reactants?     a) Zero-order reaction      b) First-order reaction      c) Second-order reaction      d) All of the above  15. What is typically observed when a reaction reaches equilibrium?     a) The concentrations of reactants and products remain constant      b) The forward reaction stops completely      c) The rate of formation of products exceeds that of reactants      d) The temperature stabilizes at a fixed point  ▎Answers: 1. a 2. d 3. b 4. c 5. c 6. c 7. a 8. c 9. d 10. b 11. a 12. b 13. c 14. c 15. a @chemistry_group33

በሰማዩ ላይ ቢታይ ቀለም የእሷ ነው እንጂ ሌላ አይደለም የመጪው ዘመን ፊት ናት መሪ ዛሬ ዓለም ቢላት ኋላ ቀሪ። ባልፍም ኖሬ ስለ እናት ምድሬ እሷ ናት ክብሬ ኧረ እኔስ ሀገሬ ኢትዮጵያ ሀገሬ በአንቺ አይደል ወይ ክብሬ ኢትዮጵያዬ 💚💛❤ ኢ ት ዮ ጵ ያ !!!

Qormaata Torbee Qubee Akkaadaamii Qubee Academy Weekly Exam: Week - 19 Mathematics (Round 10) Exam Total Given Questions : 20 Time allowed : 60 Minutes 👇👇👇👇👇👇👇👇👇👇👇👇 https://forms.gle/vU6kgexjJctPW7Dh8

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Qormaata Torbee Qubee Akkaadaamii Qubee Academy Weekly Exam: Week - 19 English (Round 14) Exam Total Given Questions : 30 Time allowed : 50 Minutes 👇👇👇👇👇👇👇👇👇👇👇👇 https://forms.gle/9MAJrAnaapVNBYXj9

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Uwwisa qormaata Biyyooleessaa bara 2018e.c

Here are 10 medium-level multiple-choice questions and 10 easy-level multiple-choice questions about relations and functions, along with their answers at the end. ▎Medium-Level Questions 1. Which of the following is a function?    a) {(1, 2), (1, 3), (2, 4)}     b) {(1, 2), (2, 3), (3, 4)}     c) {(1, 2), (2, 3), (1, 4)}     d) None of the above  2. What is the range of the function f(x) = x^2 for x ∈ [-3, 3]?    a) [0, 9]     b) [-9, 9]     c) [-3, 3]     d) [3, 9]  3. If f(x) = 2x + 3, what is f(4)?    a) 8     b) 11     c) 14     d) 7  4. Which of the following represents the inverse function of f(x) = 3x - 5?    a) f^(-1)(x) = (x + 5)/3     b) f^(-1)(x) = (x - 5)/3     c) f^(-1)(x) = 3/x + 5     d) f^(-1)(x) = x/3 + 5  5. If g(x) = x^3 - 1, what is g(2)?    a) 7     b) 8     c) 6     d) 5  6. Which of the following sets of ordered pairs represents a one-to-one function?    a) {(1, 2), (2, 3), (3, 4)}     b) {(1, 2), (1, 3), (2, 4)}     c) {(1, 2), (2, 2), (3, 4)}     d) {(1, 2), (3, 4), (5, 6)}  7. The domain of the function f(x) = √(x - 4) is:    a) [4, ∞)     b) (-∞, ∞)     c) [0, ∞)     d) [0, 4]  8. If f(x) = x^2 and g(x) = x + 1, what is (f ∘ g)(x)?    a) x^2 + 1     b) (x + 1)^2     c) x^2 + x + 1     d) x^2 - 1  9. What is the vertical line test used for?    a) To determine if a graph is a function     b) To find the domain of a function     c) To find the range of a function     d) To determine if a function is increasing or decreasing  10. If h(x) = |x - 2|, what is h(-1)?     a) -3      b) 3      c) -1      d) 1  ▎Easy-Level Questions 1. What is a function?    a) A relation where each input has multiple outputs     b) A relation where each input has exactly one output     c) A set of numbers only     d) None of the above  2. Which of the following is an example of a linear function?    a) f(x) = x^2     b) f(x) = x + 5     c) f(x) = √x     d) f(x) = sin(x)  3. What is the output of f(0) if f(x) = x + 5?    a) 0     b) 5     c) -5     d) Undefined  4. The equation y = mx + b represents:    a) A quadratic function     b) A linear function     c) An exponential function     d) A polynomial function  5. If f(x) = x - 2, what is f(3)?    a) 1     b) -1     c) 5     d) Undefined  6. Which of the following represents a relation?    a) { (1,2), (2,3), (3,4)}     b) { (1,2), (1,3)}     c) { (a,b), (b,c)}     d) All of the above  7. What is the y-intercept of the function y = 2x + 3?    a) 2     b) 3     c) -3     d) Undefined  8. If f(x)=2x and g(x)=x+1, what is g(f(1))?    a) 4     b) 5     c) 6     d) 7  9. The graph of which function is a parabola?    a) f(x)=x+1     b) f(x)=x^2+2x+1     c) f(x)=e^x     d) f(x)=log(x) 10. Which of the following indicates that a relation is not a function?     a) Each input has one output      b) An input has multiple outputs      c) Each output has one input      d) None of the above  ▎Answers Medium-Level Questions: 1. b 2. a 3. b 4. a 5. a 6. a 7. a 8. b 9. a 10. b Easy-Level Questions: 1. b 2. b 3. b 4. b 5. a 6. d 7. b 8. b 9. b 10. b  IDEA FOR ALL STUDENTS