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Qormaata galuumsa kutaa 12ffaa Keemistirii, bara 2017 A.L.I (2025), marsaa 1

Gaaffilee dhugaa qormaata galuumsa yunivarsiitii kutaa 12 kan Keemistirii, akkuma barattoonni bara 2017 A.L.I itti fudhatanitti. Tokkoon tokkoon gaaffii deebii sirrii fi ibsa qaba. Qormaanni bara 2017 A.L.I marsaa tokkoo ol kennamee ture. Fuulli kun marsaa 1 qaba.

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  • 2017 A.L.I (2025), marsaa 1

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  • Gaaffilee 72 deebii waliin

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Gaaffilee qormaata kanaa yaalaa

Deebii banuun dura tokkoon tokkoon gaaffii ofii keessaniin deebisaa. Ibsi gara kutaa kitaaba barnootaa sirriitti waan qajeelchuuf, yeroo gaaffii dogoggortan fuula kam irra deebi'uu akka qabdan ni beektu.

Gaaffii 1

Which type of glass is made by heating a mixture of silica, sodium carbonate and limestone?

  1. A.Pyrex glass
  2. B.Soda-lime
  3. C.Borosilicate
  4. D.Quartz
Deebii fi ibsa ilaalaa

Deebii: B Soda-lime

Maaliif

Soda-lime glass is the most common type of glass and is manufactured by heating a mixture of silica (silicon dioxide), sodium carbonate (soda), and limestone (calcium carbonate).

Gaaffii 2

Consider the following galvanic cell:  When the Zn strip was connected to metal 'B' at 25°C, the voltmeter shows 0.51 V. Which of the following is the standard reduction potential of metal 'B'? (EZn2+/Zn∘=−0.76E^\circ_{\mathrm{Zn}^{2+}/\mathrm{Zn}} = -0.76 V)

  1. A.EB2+/B∘=1.27E^\circ_{\mathrm{B}^{2+}/\mathrm{B}} = 1.27 V
  2. B.EB2+/B∘=0.25E^\circ_{\mathrm{B}^{2+}/\mathrm{B}} = 0.25 V
  3. C.EB2+/B∘=−1.27E^\circ_{\mathrm{B}^{2+}/\mathrm{B}} = -1.27 V
  4. D.EB2+/B∘=−0.25E^\circ_{\mathrm{B}^{2+}/\mathrm{B}} = -0.25 V
Deebii fi ibsa ilaalaa

Deebii: D EB2+/B∘=−0.25E^\circ_{\mathrm{B}^{2+}/\mathrm{B}} = -0.25 V

Maaliif

The standard reduction potential of Zn is −0.76 V-0.76\text{ V}. Since the cell potential is 0.51 V0.51\text{ V}, using Ecell∘=Ecathode∘−Eanode∘E^\circ_{\mathrm{cell}} = E^\circ_{\mathrm{cathode}} - E^\circ_{\mathrm{anode}} and setting Zn as the anode yields 0.51 V=EB2+/B∘−(−0.76 V)0.51\text{ V} = E^\circ_{\mathrm{B}^{2+}/\mathrm{B}} - (-0.76\text{ V}), which gives EB2+/B∘=−0.25 VE^\circ_{\mathrm{B}^{2+}/\mathrm{B}} = -0.25\text{ V}.

Gaaffii 3

Which of the following polymer is used to make ropes, clothes, hair combs and stockings?

  1. A.Bakelite
  2. B.Teflon
  3. C.Nylon
  4. D.Perspex
Deebii fi ibsa ilaalaa

Deebii: C Nylon

Maaliif

Nylon is a synthetic polyamide polymer that has high tensile strength and elasticity, making it ideal for manufacturing ropes, stockings, clothes, and combs.

Gaaffii 4

Which of the following catalyst is used in the Ostwald process for the production of HNO3HNO_3?

  1. A.CuO
  2. B.Fe
  3. C.V2O5V_2O_5
  4. D.Pt
Deebii fi ibsa ilaalaa

Deebii: D Pt

Maaliif

The Ostwald process converts ammonia to nitric acid, utilizing a platinum (Pt) or platinum-rhodium gauze catalyst in its first step of catalytic oxidation of ammonia.

Gaaffii 5

Which of the following factors does NOT affect the rate of a chemical reaction having solid reactants?

  1. A.Volume of reaction vessel
  2. B.Physical state of reactants
  3. C.Temperature of reaction
  4. D.Concentration of reactants
Deebii fi ibsa ilaalaa

Deebii: A Volume of reaction vessel

Maaliif

The volume of the reaction vessel affects the reaction rate only when gaseous reactants are involved. It does not affect reactions occurring purely between solid reactants.

Gaaffii 6

What is the electron configuration of O2−O_2^- molecule as per the molecular orbital model? (Atomic number of O=8O = 8)

  1. A.σ₁s² σ₁s*² σ₂s² σ₂s*² σ₂px² (π₂py² = π₂pz²) (π*₂py¹ = π*₂pz¹)
  2. B.σ₁s² σ₁s*² σ₂s² σ₂s*² σ₂px² (π₂py² = π₂pz²) (π*₂pz²)
  3. C.σ₁s² σ₁s*² σ₂s² σ₂s*² σ₂px² (π₂py² = π₂pz²) (π*₂py² = π*₂pz²)
  4. D.σ₁s² σ₁s*² σ₂s² σ₂s*² σ₂px² (π₂py² = π₂pz²) (π*₂py² = π*₂pz¹)
Deebii fi ibsa ilaalaa

Deebii: D σ₁s² σ₁s*² σ₂s² σ₂s*² σ₂px² (π₂py² = π₂pz²) (π*₂py² = π*₂pz¹)

Maaliif

The superoxide ion (O2−O_2^-) has 17 electrons. According to the molecular orbital energy levels for oxygen, the 17th electron enters the degenerate antibonding π2p∗\pi^*_{2p} orbitals, resulting in the configuration ending with (π2py∗)2=(π2pz∗)1(\pi^*_{2p_y})^2 = (\pi^*_{2p_z})^1.

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Gaaffilee 72 kuusaa kana keessa jiran hunda akka waraqaa qormaataa maxxanfameetti, furtuu deebii ibsa 72 waliin immoo akka faayilii lammaffaatti. Maxxansaa yookiin daataa malee dubbisaa.

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Herregni Temari bilisaa qormaata Keemistirii guutuu fi kan waggoota biroo hunda qormaatilee fakkeenyaa sa'aatiin daangeffaman godhee qabxii battalumaa waliin isiniif kenna. Bilbila kamiyyuu irratti, walitti hidhamiinsa laafaa irrattillee ni hojjeta.

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Qormaatilee Keemistirii biroo bara 2017 A.L.I

2017 A.L.I (2025)2017 A.L.I (2025), maxxansa 2

Qormaatilee Keemistirii kan waggoota biroo

2018 A.L.I (2026)2018 A.L.I (2026), maxxansa 12018 A.L.I (2026), maxxansa 22018 A.L.I (2026), maxxansa 42016 A.L.I (2024)2016 A.L.I (2024), TigraayFakkeenyaa, bara 2016 A.L.I2015 A.L.I (2023)2014 A.L.I (2022)2013 A.L.I (2021)2012 A.L.I (2020)2011 A.L.I (2019)2010 A.L.I (2018)2009 A.L.I (2017)2008 A.L.I (2016)2007 A.L.I (2015)2006 A.L.I (2014)2005 A.L.I (2013)

Qormaatilee kana fakkaatan dabalataa

Qormaatilee Keemistirii kutaa 12ffaa hundaQormaatilee bara 2017 A.L.I hundaGosa barnootaa fi bara hunda

Qormaata kana taa'uu dura Keemistirii qayyabadhu

Yaadannoon gabaabaan Keemistirii kutaa 12 kaardii 22 qaba. Tokkoon tokkoon boqonnaa boqonnaadhaan kitaaba biyyaalessaa irraa qophaa'ee seericha, mallattoowwan isaa maal bakka akka bu'an fi dogoggora qabxii nama dhabsiisu ni ibsa.

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Kunneen gaaffilee dhugaa qormaata galuumsa Keemistirii bara 2017 A.L.I ti?

Eeyyee. Qormaata galuumsa yunivarsiitii biyyaalessaa kan Keemistirii barattoonni bara 2017 A.L.I (2025) fudhatan irraa fudhataman. Kuusaan keenya gaaffilee isaa 72 qaba; tokkoon tokkoon isaanii deebii fi ibsa gara kitaaba barnootaatti qajeelchu qabu.

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