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 nuclear reactors, destructive neutrons are absorbed by:
______ جوہری ری ایکٹر میں تباہ کن نیوٹرونز کو کون جذب کرتا ہے؟
Choices:
A. Heavy water
B. Long rods of Cd (Cadmium)
C. Cubical blocks of steel
D. A pile of blocks made of graphite
✅ Answer: B. Long rods of Cd (Cadmium)
📝 Explanation: Cadmium rods absorb excess neutrons, controlling the chain reaction in nuclear reactors.
Generally, in a given period of the periodic table, as we move from left to right, the electropositive character of elements:
______ عمومی طور پر پیریاڈک ٹیبل کے کسی بھی دور میں بائیں سے دائیں جاتے ہوئے، عناصر کی برقی مثبت خصوصیت کیا ہوتی ہے؟
Choices:
A. Increases
B. Decreases
✅ Answer: B. Decreases
📝 Explanation: Electropositivity (tendency to lose electrons) decreases across a period due to increasing nuclear attraction.
The high boiling point of water is due to?
______ پانی کا بلند نقطہ ابال کس وجہ سے ہے؟
Choices:
A. Weak dissociation of the water molecule
B. Hydrogen bonding among water molecules
C. Its high specific heat
D. Its high dielectric constant
✅ Answer: B. Hydrogen bonding among water molecules
📝 Explanation: Strong hydrogen bonds between water molecules require more energy to break, leading to a higher boiling point.
Ice has an open structure compared to water, which makes it float and occupy more volume. This open structure is due to?
______ برف کا پانی کے مقابلے میں کھلا ڈھانچہ ہوتا ہے، جو اسے تیرنے اور زیادہ جگہ گھیرنے کے قابل بناتا ہے۔ یہ کھلا ڈھانچہ کس وجہ سے ہوتا ہے؟
Choices:
A. Solid state of ice
B. Its low density
C. Crystalline nature
D. Hydrogen bonding
✅ Answer: D. Hydrogen bonding
📝 Explanation: Hydrogen bonding in ice forms a rigid, open lattice structure, making ice less dense than water.
Adver
A gas can be liquefied by pressure alone when its temperature is?
______ ایک گیس کو صرف دباؤ کے ذریعے مائع میں تبدیل کیا جا سکتا ہے جب اس کا درجہ حرارت؟
Choices:
A. Higher than the critical temperature
B. Lower than its critical temperature
C. Equal to its critical temperature
D. None
✅ Answer: B. Lower than its critical temperature
📝 Explanation: A gas can only be liquefied if its temperature is below the critical temperature; above this, it remains in a gaseous state.
Gases can be compressed to a greater extent because?
______ گیسوں کو زیادہ دبایا جا سکتا ہے کیونکہ؟
Choices:
A. Molecules are elastic
B. There is no gap between molecules
C. These are lighter than liquids
D. There is a large space between the molecules
✅ Answer: D. There is a large space between the molecules
📝 Explanation: Gas molecules are far apart, allowing them to be compressed significantly under pressure.
The cooling caused by the expansion of a compressed gas below its inversion temperature without doing external work is called?
______ ایک دبائی ہوئی گیس کے پھیلنے سے جو ٹھنڈک پیدا ہوتی ہے، اسے کیا کہتے ہیں؟
Choices:
A. Joule-Thomson effect
B. Adiabatic demagnetism
C. Faraday-Tyndall effect
D. Compton effect
✅ Answer: A. Joule-Thomson effect
📝 Explanation: The Joule-Thomson effect describes temperature changes in a gas when it expands without external work.
Which of the following solutions will have the highest boiling point?
______ درج ذیل میں سے کس محلول کا نقطہ ابال سب سے زیادہ ہوگا؟
Choices:
A. 1% glucose in water
B. 1% sucrose in water
C. 1% NaCl in water
D. 1% CaCl₂ in water
✅ Answer: D. 1% CaCl₂ in water
📝 Explanation: CaCl₂ dissociates into three ions (Ca²⁺ and 2Cl⁻), increasing the boiling point due to more solute particles (colligative property).
Sea water is converted into fresh water using the phenomenon of?
______ سمندری پانی کو میٹھے پانی میں تبدیل کرنے کے لیے کون سا عمل استعمال کیا جاتا ہے؟
Choices:
A. Plasmolysis
B. Sedimentation
C. Reverse osmosis
D. Diffusion
✅ Answer: C. Reverse osmosis
📝 Explanation: Reverse osmosis removes salt from seawater by applying pressure to pass water through a semi-permeable membrane.
When glycerine is added to a liter of water, which of the following is observed?
______ جب گلیسرین کو ایک لیٹر پانی میں شامل کیا جائے تو کون سا نتیجہ سامنے آتا ہے؟
Choices:
A. Water evaporates more easily
B. The temperature of water increases
C. The freezing point of water is lowered
D. The viscosity of water is lowered
✅ Answer: C. The freezing point of water is lowered
📝 Explanation: Glycerine is a non-volatile solute, lowering the freezing point of water (a colligative property).
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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