Reactions & processes

Total Questions: 15

1 - When table salt NaCl is added to water----?

A ) A covalent bond is broken
B ) Sodium and chlorine ions sodium are separated ✅
C ) Sodium is attracted to the hydrogen atoms of water
D ) An acidic solution formed

2 - Boiling of an egg is a------:
A ) Physical change
B ) Chemical change
C ) Both a and b ✅
D ) None of these

3 - Fission reaction is which type of reaction?

A ) Physical
B ) Chemical ✅
C ) Analytical
D ) None of these

4 - Burning of candle is which change----:
A ) Thermal
B ) Physical
C ) Chemical ✅
D ) None of these

5 - Which of the following is not a chemical reaction?

A ) Digestion of food
B ) Burning of a coal
C ) Conversion of water intestine ✅
D ) Burning of a paper

6 - Which of the following is responsible for turning Taj mahal yellow?

A ) Carbon dioxide
B ) Sulphur dioxide ✅
C ) Chlorine
D ) Ammonia

7 - The bloating paper helps absorb liquids by----:
A ) Capillary action ✅
B ) Viscosity
C ) Surface tension
D ) None of these

8 - Soap and detergents remove dirt from clothes due to----:
A ) Lowering of interfacial tension ✅
B ) Diffusion
C ) Osmosis
D ) Capillary action

9 - Which of the following is used to speed of a chemical reaction?

A ) Catalyst ✅
B ) Enzyme
C ) Bio enzyme
D ) Bio catalyst

10 - Which catalyst is used for separation of Oxygen and hydrogen in water?

A ) Heat
B ) Electricity ✅
C ) Sodium chloride
D ) Nitric acid

11 - Which is more efficient at absorbing infrared radiation then carbon dioxide?

A ) Fog
B ) Clouds
C ) Water vapors ✅
D ) Moisture

12 - What are liquids that evaporate quickly called-----:
A ) Viscous
B ) Volatile ✅
C ) Evaporation
D ) None of these

13 - The movement of particle from an area of high concentration to an area of low concentration is known as:
A ) Diffusion ✅
B ) Osmosis
C ) Active Transport
D ) All of these

14 - سالوے پروسس کس کی تیاری میں استعمال ہوتا ہے؟
A ) سوڈیم کاربونیٹ ✅
B ) سوڈیم کلورائڈ
C ) کیلشیم کلورائڈ
D ) کیلشیم کاربونیٹ

15 - مایع ہاءڈرو کاربنز کو گیسی حالت میں تبدیل کرنے میں کون سا عمل شامل ہے؟
A ) کریکنگ ✅
B ) ڈسٹلیشن
C ) ری فارمنگ
D ) پولیمنائزیشن
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