Qormaatilee darban

Qormaata galuumsa Keemistirii, bara 2017 A.L.I (2025)

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.

Bilisaan shaakaluu jalqabaa Waraqaa gaaffii

Damee saayinsii uumamaa
Eenyutu fudhata
2017 A.L.I (2025)
Bara qormaataa
Gaaffilee 76 deebii waliin
Kuusaa kana keessa

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 of the following atomic models is NOT expressed correctly?

A.Dalton's atomic model. billiard ball model
B.Thomson's model of atom .Plum pudding model
C.Thomson's model of atom .Planetary model
D.Rutherford atomic model .Nuclear model

Deebii fi ibsa ilaalaa

Deebii: C Thomson's model of atom .Planetary model

Maaliif

The planetary model, with electrons circling a central nucleus the way planets orbit the sun, came from Rutherford and was refined by Bohr. Thomson's picture had no nucleus at all: he described a ball of positive charge with electrons stuck through it, which is the plum pudding model. Pairing Thomson with the planetary model is therefore the mismatch. Option B names Thomson too, but plum pudding is exactly what he proposed, so that row is matched correctly.

Gaaffii 2

Suppose an unknown element does NOT deflect cathode rays in an electric field but has significant mass. Based on atomic models, which subatomic particle could it be composed of, and how would this impact the element's atomic structure?

A.Protons; making the nucleus positively charged
B.Neutrons; contributing to atomic mass without charge
C.Electrons; moving freely in orbitals
D.Positrons; leading to an unstable atom

Deebii fi ibsa ilaalaa

Deebii: B Neutrons; contributing to atomic mass without charge

Maaliif

Cathode rays are beams of electrons, and a charged particle placed in an electric field is pushed to one side. This particle is not deflected, so it carries no charge. It still has real mass, and the only subatomic particle that is heavy and neutral is the neutron. It adds to the mass number without changing the atomic number. Option A is tempting because protons are heavy as well, but a proton is positive and the field would deflect it.

Gaaffii 3

A student is studying an atom with a mass number of 23 and an atomic number of 11. Based on nuclear composition, which of the following statements is correct?

A.The nucleus contains 11 protons and 12 neutrons
B.The nucleus contains 11 neutrons and 12 protons
C.The nucleus contains only 11 protons
D.The nucleus contains 23 neutrons and 11 protons

Deebii fi ibsa ilaalaa

Deebii: A The nucleus contains 11 protons and 12 neutrons

Maaliif

The atomic number counts the protons, so this atom has 11 protons. The mass number counts protons plus neutrons together, so the neutrons are \( 23 - 11 = 12 \). The nucleus holds 11 protons and 12 neutrons. Option D is tempting if you read 23 as the number of neutrons, but 23 is the total of both kinds of particle, not the neutrons alone.

Gaaffii 4

A scientist shines red and blue light on a metal surface. The red light does not eject electrons, but the blue light does. What conclusion can be drawn?

A.The red light has higher intensity than the red light
B.The blue light has a higher frequency and sufficient energy
C.The red light has more energy than the blue light
D.The photoelectric effect depends only on intensity, not frequency

Deebii fi ibsa ilaalaa

Deebii: B The blue light has a higher frequency and sufficient energy

Maaliif

In the photoelectric effect a single photon must carry at least the work function energy before an electron can leave the metal. Photon energy is \( E = h\nu \), so it is set by frequency, not by how bright the beam is. Blue light has the higher frequency, so its photons carry enough energy while red photons do not. Option D is tempting because a brighter beam does eject more electrons, but that only happens once the frequency is already above the threshold. Below it, no amount of intensity helps.

Gaaffii 5

The maximum kinetic energy of photoelectrons ejected from a metal when it is subjected to a radiation of frequency 3.0 × 10^15 Hz is 6.63 × 10^-19 J. The threshold frequency, ν₀ of the photoelectron of the metal is

A.1.0×10^15 Hz
B.2.0×10^-15 Hz
C.3.0×10^15 Hz
D.2.0×10^15 Hz

Deebii fi ibsa ilaalaa

Deebii: D 2.0×10^15 Hz

Maaliif

Use \( h\nu = h\nu_0 + KE_{max} \). The incoming photon carries \( E = 6.63\times10^{-34}\times3.0\times10^{15} = 1.99\times10^{-18} \) J. Take away the kinetic energy: \( h\nu_0 = 1.99\times10^{-18} - 6.63\times10^{-19} = 1.33\times10^{-18} \) J. Then \( \nu_0 = 1.33\times10^{-18} \div 6.63\times10^{-34} = 2.0\times10^{15} \) Hz. Option B carries the right digits but a negative power of ten, and \( 2.0\times10^{-15} \) Hz is not a frequency any light source produces.

Gaaffii 6

Which of the following correctly explains Heisenberg's Uncertainty Principle?

A.The exact position and momentum of a particle can be simultaneously determined.
B.The more precisely the position of an electron is known, the less precisely its momentum is known.
C.It suggests that electrons move in fixed circular orbits around the nucleus.
D.It only applies to macroscopic objects and not quantum particles.

Deebii fi ibsa ilaalaa

Deebii: B The more precisely the position of an electron is known, the less precisely its momentum is known.

Maaliif

Heisenberg's principle says the position and the momentum of a particle cannot both be pinned down at the same moment. The more tightly you fix where the electron is, the more its momentum is left uncertain, because \( \Delta x \cdot \Delta p \ge h/4\pi \). Option A states the opposite. Option D is tempting, but the limit applies to every object. It only matters for very light particles such as electrons, where the uncertainty is large compared with the values themselves.

Qormaata guutuu PDF dhaan buufadhaa

Gaaffilee 76 kuusaa kana keessa jiran hunda akka waraqaa qormaataa maxxanfameetti, furtuu deebii ibsa 76 waliin immoo akka faayilii lammaffaatti. Maxxansaa yookiin daataa malee dubbisaa.

Bilisa; herregas hin gaafatu.

Waraqaa gaaffii Furtuu deebii fi ibsa

Qormaata guutuu sa'aatiin daangeffamee hojjedhaa

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.

Bilisaan shaakaluu jalqabaa

Qormaatilee Keemistirii kan waggoota biroo

2018 A.L.I (2026)2016 A.L.I (2024)2015 A.L.I (2023)2014 A.L.I (2022)2013 A.L.I (2021)2005 A.L.I (2013)

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.

Yaadannoo Keemistirii bani

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 76 qaba; tokkoon tokkoon isaanii deebii fi ibsa gara kitaaba barnootaatti qajeelchu qabu.

Qormaata guutuu akkamittan shaakala?

Lakkoofsa bilbilaatiin herrega bilisaa banadhaa. Qormaatichi guutuun qormaata fakkeenyaa sa'aatiin daangeffame ta'ee qabxii battalumaa kenna; fooyya'iinsi gargaaraa AI ji'atti qarshii 199 kan ta'e waan isin jalaa darbe hunda isinii ibsa.

Qormaata Keemistirii bara 2017 A.L.I PDF dhaan buufachuu nan danda'aa?

Eeyyee; bilisas. Waraqaan gaaffii faayilii tokko, furtuun deebii ibsa isaa waliin immoo faayilii biraa ti; kanaaf qormaata dursitanii yaaluu dandeessu. Maxxansaa, yookiin yeroo daataan hin jirre irra deebiif bilbila keessan irratti kaa'adhaa.