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
At high altitudes, the boiling point of water decreases because?
______ اونچائی پر پانی کا نقطہ ابال کم ہو جاتا ہے کیونکہ؟
Choices:
A. Atmospheric pressure is low
B. Temperature is low
C. Atmospheric pressure is high
✅ Answer: A. Atmospheric pressure is low
📝 Explanation: Lower atmospheric pressure at high altitudes reduces the boiling point of water, requiring less heat to reach boiling.
A pressure cooker reduces cooking time because?
______ پریشر ککر کھانے کے پکنے کا وقت کم کر دیتا ہے کیونکہ؟
Choices:
A. Heat is more evenly distributed
B. Boiling point of water inside the cooker is increased
C. The high pressure tenderizes the food
D. A longer flame is used
✅ Answer: B. Boiling point of water inside the cooker is increased
📝 Explanation: Increased pressure inside the cooker raises the boiling point of water, allowing food to cook faster at a higher temperature.
Smoke is an example of?
______ دھواں کس کی مثال ہے؟
Choices:
A. Gas dispersed in liquid
B. Gas dispersed in solid
C. Solid dispersed in gas
D. Solid dispersed in solid
✅ Answer: C. Solid dispersed in gas
📝 Explanation: Smoke consists of tiny solid particles (like carbon) dispersed in a gas (air), forming an aerosol.
Milk is a colloid in which?
______ دودھ ایک کولائیڈ ہے جس میں؟
Choices:
A. A liquid is dispersed in a liquid
B. A solid is dispersed in a liquid
C. A gas is dispersed in a liquid
D. Some sugar is dispersed in water
✅ Answer: A. A liquid is dispersed in a liquid
📝 Explanation: Milk is an emulsion where tiny fat droplets (liquid) are dispersed in another liquid (water).
Butter is a colloid. How is it formed?
______ مکھن ایک کولائیڈ ہے، یہ کیسے بنتا ہے؟
Choices:
A. Fat is dispersed in solid casein
B. Fat globules are dispersed in water
C. Water is dispersed in fat
D. Globulin is suspended in water
✅ Answer: C. Water is dispersed in fat
📝 Explanation: Butter is a water-in-fat emulsion, meaning tiny water droplets are dispersed within fat.
Adver
Milk can be preserved by adding a few drops of:
______ دودھ کو محفوظ رکھنے کے لیے چند قطرے کس چیز کے شامل کیے جاتے ہیں؟
Choices:
A. Formic acid solution
B. Formaldehyde solution
C. Acetic acid solution
D. Acetaldehyde solution
✅ Answer: B. Formaldehyde solution
📝 Explanation: Formaldehyde inhibits bacterial growth, extending the shelf life of milk.
The cleaning action of soaps and detergents is due to their:
______ صابن اور ڈٹرجنٹ کی صفائی کی صلاحیت کس وجہ سے ہوتی ہے؟
Choices:
A. Interfacial area
B. High molecular weight
C. Ionization
D. Emulsifying properties
✅ Answer: D. Emulsifying properties
📝 Explanation: Soaps and detergents break down grease and oils into smaller particles that mix with water, making them easier to wash away.
Gelatin is added to ice cream to:
______ آئس کریم میں جیلاٹن شامل کرنے کا مقصد کیا ہے؟
Choices:
A. Prevent the formation of a colloidal solution
B. Stabilize the colloids and prevent crystal growth
C. Improve the flavor
D. Increase the bulk
✅ Answer: B. Stabilize the colloids and prevent crystal growth
📝 Explanation: Gelatin acts as a stabilizer, preventing ice crystals from forming and ensuring a smooth texture in ice cream.
Digestion of fats in the intestines is aided by:
______ آنتوں میں چکنائی کو ہضم ہونے میں کس عمل سے مدد ملتی ہے؟
Choices:
A. Hydrolysis
B. Oxidation
C. De-emulsification
D. Emulsification
✅ Answer: D. Emulsification
📝 Explanation: Bile salts break large fat globules into smaller droplets, making digestion by enzymes more efficient.
The rate of a chemical reaction depends on the nature of reactants because:
______ کیمیائی عمل کی رفتار مادوں کی نوعیت پر کیوں منحصر ہوتی ہے؟
Choices:
A. Energy of activation differs from one reactant to another
B. Some reactants are solid at room temperature
C. Some reactants are colored
D. All are correct
✅ Answer: A. Energy of activation differs from one reactant to another
📝 Explanation: Each reactant requires a different activation energy, which directly affects the reaction speed.
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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