Chemistry MCQs for ETEA Jobs – Test Preparation Guide
Are you preparing for the ETEA Chemistry job exam? Look no further! This guide provides a comprehensive collection of MCQs, past papers, solved questions, and study materials to help you prepare effectively and enhance your chances of success.
Key Features of This Guide
✅ Latest ETEA Chemistry MCQs (Updated for 2025)✅ Pak MCQs for General Knowledge & Current Affairs
✅ Past Papers with Solutions – Learn from previous exams
✅ Syllabus Breakdown – Understand what to study
✅ Effective Study Tips – Proven strategies for scoring high
✅ Downloadable PDFs – Get past papers in one click
In a closed flask containing water in all three states (solid, liquid, gas) at 0°C, the average kinetic energy of water molecules is:
______ ایک بند فلاسک میں، جہاں پانی تینوں حالتوں (ٹھوس، مائع، اور گیس) میں موجود ہو، 0°C پر پانی کے مالیکیولز کی اوسط حرکی توانائی کہاں زیادہ ہوگی؟
Choices:
A. Maximum in vapour state
B. Maximum in solid state
C. Greater in liquid than vapour state
D. Same in all three states
✅ Answer: A. Maximum in vapour state
📝 Explanation: Gas molecules have the highest kinetic energy because they move freely compared to liquids and solids.
During electrolysis, metals are deposited at the cathode because the cathode:
______ الیکٹروالیسس کے دوران دھاتیں کیتھوڈ پر کیوں جمع ہوتی ہیں؟
Choices:
A. Supplies electrons
B. Withdraws electrons
C. Undergoes oxidation
D. None is correct
✅ Answer: A. Supplies electrons
📝 Explanation: The cathode provides electrons, allowing metal ions to gain electrons (reduction) and form solid metal deposits.
With the rise in temperature, the conductivity of metals:
______ درجہ حرارت بڑھنے سے دھاتوں کی برقی چالکتا پر کیا اثر پڑتا ہے؟
Choices:
A. Decreases
B. Increases
C. Remains unchanged
D. May decrease or increase
✅ Answer: A. Decreases
📝 Explanation: As temperature increases, atomic vibrations intensify, creating more resistance to electron flow and reducing conductivity.
Heavy water is known as heavy because it?
______ بھاری پانی کو بھاری کیوں کہا جاتا ہے؟
Choices:
A. Is denser than ordinary water
B. Is an oxide of deuterium
C. Has a heavy or bad taste
D. Has a heavier isotope of hydrogen
✅ Answer: A. Is denser than ordinary water
📝 Explanation: Heavy water (D₂O) contains deuterium, an isotope of hydrogen, making it denser than ordinary H₂O.
On descending a group in the periodic table, the electropositive character of elements?
______ پیریوڈک ٹیبل میں کسی گروپ میں نیچے جانے پر عناصر کی برقی مثبتیت؟
Choices:
A. Increases
B. Decreases
C. Remains same
D. None
✅ Answer: A. Increases
📝 Explanation: Electropositive character (or metallic character) increases down a group because atomic size increases, reducing the attraction between the nucleus and valence electrons, making electron loss easier.
Adver
In the periodic table, on moving from left to right across a period, the metallic character of an element?
______ پیریوڈک ٹیبل میں بائیں سے دائیں جانے پر عناصر کی دھاتی خصوصیت؟
Choices:
A. Increases
B. Decreases
C. Increases and then decreases
D. Remains constant
✅ Answer: B. Decreases
📝 Explanation: Across a period, nuclear charge increases, attracting electrons more strongly and making elements less likely to lose electrons, thus decreasing metallic character.
Mendeleev's periodic table is upset by the fact that?
______ مینڈیلیو کی پیریوڈک ٹیبل میں سب سے بڑی خرابی کیا تھی؟
Choices:
A. Noble gases do not form compounds
B. Atomic weight of elements is not always whole numbers
C. Many elements have several isotopes
D. Some groups stand divided into two subgroups A and B
✅ Answer: C. Many elements have several isotopes
📝 Explanation: Mendeleev's periodic table was based on atomic weight, but isotopes of elements (having different atomic weights) created inconsistencies.
Most of the known elements are?
______ زیادہ تر معلوم شدہ عناصر کس قسم کے ہوتے ہیں؟
Choices:
A. Metals
B. Non-metals
C. Transition metals
D. Inner transition metals
✅ Answer: A. Metals
📝 Explanation: Around 75% of the elements in the periodic table are metals.
Stainless steel does not rust because?
______ سٹین لیس سٹیل زنگ نہیں لگتا کیونکہ؟
Choices:
A. Nickel present in it does not rust
B. Iron forms a hard chemical compound with chromium present in it
C. Chromium and nickel combine with iron
D. Chromium forms an oxide layer that protects iron from rusting
✅ Answer: D. Chromium forms an oxide layer that protects iron from rusting
📝 Explanation: Chromium in stainless steel forms a protective oxide layer that prevents oxidation (rusting).
The engines of the rocket that helped the Apollo 11 spacecraft to land on the moon used which rocket fuel?
______ اپالو 11 کے راکٹ انجن میں کون سا ایندھن استعمال کیا گیا تھا؟
Choices:
A. O₂
B. H₂
C. Propane
D. Hydrazine
✅ Answer: D. Hydrazine
📝 Explanation: Hydrazine (N₂H₄) is a commonly used high-energy rocket fuel.
Download ETEA Chemistry Past Papers PDF
For easy access to past papers, download the PDF file below:
[Download PDF Here]
By practicing past papers, you’ll learn how to manage your time effectively during the exam and understand the types of questions that typically appear.
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