QUBEE ACADEMY

Answer key for the above
G12 First Semester Model Exam
January 2017/2025

By:
OROMIA EDUCATION BUREAU

https://www.tgoop.com/qubeeacademy
https://www.tgoop.com/qubeeacademy

8.7K viewsFayisa Hailu, 23:51

QUBEE ACADEMY

https://youtu.be/Q_lXR68RwhA

YouTube

2. Grade 11 & 12 English | Entrance Exam Based | Part 2 | Informal Letter Writing

This video helps you to understand letter writing, the common types of letters, and its main parts, particularly you will learn informal styles of letter writing.

6.1K viewsFayisa Hailu, 05:52

QUBEE ACADEMY

Yuunivarsiitiiwwan garagara qormaata ba’iinsaa (Exit Exam) barattoota digrii jalqabaan eebbifamuuf jiraniif har’a eegale naamusa qormaataa cimaa ta’een gaggeessaa akka jiran beeksisaniiru.

Yuunivarsiitiin Wallaggaa meeshaalee dhorkaman ykn kanneen wiirtuuwwan qormaataa fiduuf hin hayyamamne sakatta’uun barattoota fudhatanii seenuuf yaalan to’annaa jala oolchuu beeksise.

Kanarraa kan ka’e yunivarsiitichi barattoonni meeshaalee teeknooloojii dhorkaman, gowwoomsaa fi hannaaf haala mijeessan qabatanii argaman kutaa qormaataa akka hin seenne dhorkeera.

https://www.tgoop.com/Oromiastudent_s
https://www.tgoop.com/Oromiastudent_s

7.0K viewsFayisa Hailu, 08:06

QUBEE ACADEMY

#10 MCQs on Electrochemistry (Grade 12)
Answers and explanations are provided.

# 1. What is the oxidation number of oxygen in KO₂ (superoxide)?
A) –2
B) –1
C) –1/2
D) +1

Answer: C) –1/2
Explanation: Rule 3 states oxygen in superoxides (e.g., KO₂) has an oxidation state of –1/2.

# 2. In the reaction: Mg(s) + 2HCl → MgCl₂(aq) + H₂(g), which species is oxidized?
A) Mg
B) H⁺
C) Cl⁻
D) H₂

Answer: A) Mg
Explanation: Mg loses electrons (oxidation: 0 → +2). H⁺ is reduced (gain electrons).

#3. In electrolytic conduction, what causes the increase in conductivity with temperature?
A) Delocalized electrons
B) Enhanced ionic mobility
C) Decomposition of ions
D) Reduced electrode resistance

Answer: B) Enhanced ionic mobility
Explanation: Electrolytic conductivity increases due to higher ionic mobility at elevated temperatures.

#4. During electrolysis of CuSO₄ using inert electrodes, which ion is discharged at the anode?
A) Cu²⁺
B) SO₄²⁻
C) OH⁻
D) O²⁻

Answer: C) OH⁻
Explanation: OH⁻ ions (from water) are lower in the electrochemicalL series than SO₄²⁻, so they oxidize to O₂ at the anode.

#5. What is the primary difference between metallic and electrolytic conduction?
A) Metallic conduction involves ions, while electrolytic involves electrons.
B) Metallic conduction involves electrons, while electrolytic involves ions.
C) Both involve ions.
D) Both involve electrons.

Answer: B) Metallic conduction involves electrons, while electrolytic involves ions.

#6. Which factor does NOT affect preferential discharge during electrolysis?
A) Electrode material
B) Ion concentration
C) Temperature of the solution
D) Position in the electrochemical series

Answer: C) Temperature of the solution
Explanation: Preferential discharge depends on ion position, concentration, and electrode nature, not temperature.

#7. In the electrolysis of brine (concentrated NaCl), what forms at the cathode?
A) Cl₂
B) H₂
C) O₂
D) Na

Answer: B) H₂
Explanation: H⁺ (from water) is reduced to H₂ at the cathode due to high Cl⁻ concentration favoring Cl₂ at the anode.

#8. Faraday’s first law relates mass deposited to:
A) Voltage
B) Current and time
C) Electrode surface area
D) Ion charge

Answer: B) Current and time

#9. Which metal is extracted via electrolysis of its molten oxide?
A) Iron
B) Copper
C) Aluminum
D) Zinc

Answer: C) Aluminum
Explanation: Al is extracted from molten Al₂O₃ (Hall-Héroult process).

# 10. In electroplating, the object to be plated acts as the:
A) Anode
B) Cathode
C) Electrolyte
D) Salt bridge

Answer: B) Cathode
Explanation: The metal to be plated is the cathode, where reduction (deposition) occurs.

https://www.tgoop.com/qubeeacademy
https://www.tgoop.com/qubeeacademy

Viidiyoowwaan barnoota 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇
https://youtube.com/channel/UCLPTQfMXS6we7aTT4g9MwCw

6.2K viewsFayisa Hailu, edited 18:00

QUBEE ACADEMY

Physics Grade 11 Unit 5
❤️❤️✅✅❤️❤️👇👇👇👇

https://youtube.com/channel/UCLPTQfMXS6we7aTT4g9MwCw

5.1K viewsFayisa Hailu, edited 18:45

QUBEE ACADEMY

Yuutuub chaanaalii kana 'subscribe' godhaa Qubee Academy Jabeessa.

Yuutuub chaanaalii kana irratti dhimmoota teeknooloojii wajjin walqabatan ni argattu
👇👇👇👇👇👇👇
https://youtube.com/@qubeedigital?si=wGQ0_hLdGc26gfUx

Dhaloota Qubeen Dhaloota Qubeef!

Chaanaalii Afaan Oromootin barsiisu .... Adaraa wal jabeessaa.

YouTube

Qubee Digital

Chaanaalii Qubee Digital Kana irratti viidiyoowwan teeknooloojii fi dhimmoota gara garaa wajjin wal-qabatan Afaan Oromootiin ni argattu.

7.1K viewsFayisa Hailu, edited 19:16

QUBEE ACADEMY

Mathematics Grade 11 Unit 4 Determinants and Their Properties | New Curriculum: https://www.youtube.com/playlist?list=PLJrkRkyVP9RETiBETQ2kvhF9QN38qWebm

YouTube

Mathematics Grade 11 Unit 4 Determinants and Their Properties | New Curriculum

Share your videos with friends, family, and the world

7.5K viewsFayisa Hailu, 21:24

QUBEE ACADEMY

https://youtu.be/ZxKeSXaahtE

YouTube

1. Physics Grade 11 Unit 5 | Heat Conduction and Calorimetry | Part 1 | new Curriculum| Afaan Oromoo

In this video, we'll explore heat conduction and calorimetry, covering essential concepts such as:
#What is Heat?
#What is Temperature
#Internal Energy:
#thermodynamics Work: Work done by or on a thermodynamic system.

#This video is perfect for students…

5.1K viewsFayisa Hailu, 16:33

QUBEE ACADEMY

https://youtu.be/QKZJTrReZOU
https://youtu.be/QKZJTrReZOU

YouTube

14. Grade 11 & 12 English | Entrance Exam Based | Part 14 |Grammar: Future Tense| @QUBEEDIGITAL

#qubeedigital
#qubeeacademy
In this video, you will learn about the forms and uses of Simple Future and Future Continuous Tenses with an examples. At the end you will practice some past UEE questions. Don't forget to LIKE, COMMENT, SHARE, & SUBSCRIBE to…

3.9K viewsFayisa Hailu, edited 16:37

QUBEE ACADEMY

#ads

🛑Z Secret Plus Entrance Based Tutorial!🔥🔥

📢ለ11ኛ ክፍል ተማሪዎች ታምረኛ የሆነ Z Secret Plus የሚል ፓኬጅ ፕሮግራም ተጀመረ ዝርዝር መረጃውን ከታች ያለውን የ YouTube ሊንከ በመጫን ማየት ትችላላችሁ!

🛑የምዝገባ ቀን:-ሐሙስ ፣አርብ እና ቅዳሜ

🔔ይሄ ዕድል ድጋሚ እንዳያመልጣችሁ 📢

📚 ትምህርት ሰኞ ይጀመራል

🔢 ትክክለኛው የባንክ ቁጥራችን:
👉 CBE: 1000 4217 88891
👉 Dashen: 5420182982011
👉 Account Name: Cherinet Yihune Kasa

📸 ከከፈላችሁ በኋላ ደረሰኙን ፎቶ አንስታችሁ ከታች ባለው ስልክ ቁጥር ላይ መላክ አትርሱ

📞 ስልክ ቁጥር: 0912764421 / 0912928114

📌 Join & Share

✍️ YouTube Channel:https://youtu.be/y3rl3uCxSr4

✍️ Telegram: https://www.tgoop.com/zsecrettrainingcenter

YouTube

ለ11ኛ ክፍል ተማሪዎች ታምረኛ የሆነ Z Secret Plus የሚል ፓኬጅ ተጀመረ.

ለ11ኛ ክፍል ተማሪዎች ታምረኛ የሆነ Z Secret Plus የሚል ፓኬጅ ተጀመረ.
for more free videos and for other information call us 0912764421/0912928114
Telegram:https://www.tgoop.com/zsecrettrainingcenter
Don't forget to LIKE, COMMENT & SUBSCRIBE the Channel
#zsecrettraininginstitute…

3.0K viewsFayisa Hailu, edited 06:53

QUBEE ACADEMY

Forwarded from QUBEE ACADEMY (Fayisa Hailu)

YouTube

Qubee Digital

Chaanaalii Qubee Digital Kana irratti viidiyoowwan teeknooloojii fi dhimmoota gara garaa wajjin wal-qabatan Afaan Oromootiin ni argattu.

1.3K viewsFayisa Hailu, 08:37

QUBEE ACADEMY

#Promotion

በኢትዮጵያ የዩንቨርስቲ ታሪክ ለብዙ በሚሊዎን ለሚቆጠሩ ተማሪዎች Freshman course video በአማርኛ በማቅረብ ባለውለታ የሆነው
A+ Ethiopia እነሆ አንደኛ አመቱን በማስመልከት 50ሺ Subscribers የመግባት Challenge ተጀምሯል 🥰
ለዚህም 10ሺ ብር ተዘጋጅቷል 😙 #ሰብስክራይብ በማድረግ እንዲሁም ለመጨረሻ ግዜ በተለቀቀው Logic chapter 5 በአማረኛ video ላይ Comment በማድረግ ብቻ 10ሺ ብር ተሸላሚ መሆን ትችላላችሁ🙌
ሽልማቱ በሚቀጥለው ወር በ 21 በ ቀጥታ ስርጭት ይወጣል ።
ለመሳተፍ
ዩቱብ 🔗🔗🔗🔗 👇👇👇

https://youtu.be/crJ4mQTGvZs?si=gxjGA_Mpd12EoZj9
በቴሌግራም ለመቀላቀል 10ሺ + 👇👇
👉 @AplusEthiopia
👉 @AplusEthiopia
👉 @AplusEthiopia

1.1K viewsFayisa Hailu, 19:20

QUBEE ACADEMY

1.2K viewsFayisa Hailu, 19:20

2025/02/06 23:24:30
Back to Top

HTML Embed Code:

<iframe width="100%" src="https://www.tgoop.com/buyppe/web?embed=1" title="Telegram Web" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>