Welcome to the Science Experiments and Demonstrations MCQs with Answers. In this post, we are sharing Science Experiments and Demonstrations Multiple Choice Questions and Answers in Everyday Science section for various competitive exams in Pakistan. Each question offers a chance to enhance your knowledge regarding Science Experiments and Demonstrations online MCQs Test.
Which gas is commonly used to fill balloons in science experiments to demonstrate buoyancy?
A) Helium
B) Oxygen
C) Nitrogen
D) Carbon dioxide
In the classic “volcano” experiment, which substance reacts with vinegar to create the eruption?
A) Baking soda
B) Salt
C) Sugar
D) Cornstarch
Which experiment demonstrates the process of capillary action?
A) Flower in colored water
B) Mentos in soda
C) Baking soda and vinegar
D) Ice melting in warm water
Which scientific principle is demonstrated by the floating and sinking of objects in water?
A) Buoyancy
B) Evaporation
C) Condensation
D) Friction
Which experiment can be used to demonstrate air pressure?
A) Crushing a can with cold water
B) Growing crystals
C) Dissolving salt in water
D) Spinning a top
What is the primary gas produced when combining baking soda and vinegar in an experiment?
A) Carbon dioxide
B) Oxygen
C) Hydrogen
D) Nitrogen
Which liquid is often used in density experiments to layer different substances?
A) Oil
B) Water
C) Vinegar
D) Honey
In the “lemon battery” experiment, what role does the lemon play?
A) Electrolyte
B) Electrode
C) Insulator
D) Circuit
Which of the following demonstrates Newton’s First Law of Motion?
A) A ball rolling on the floor and stopping
B) A rocket launch
C) Ice melting
D) Water freezing
Which experiment is commonly used to demonstrate chemical changes in food preservation?
A) Apple slices turning brown
B) Floating an egg in salt water
C) Growing a bean in a jar
D) Making a paper airplane
Which scientific principle is demonstrated by a pendulum swinging back and forth?
A) Conservation of energy
B) Evaporation
C) Surface tension
D) Chemical reaction
Which experiment demonstrates the refraction of light?
A) Pencil in a glass of water
B) Vinegar and baking soda volcano
C) Balloon rocket
D) Melting ice cube
Which of the following materials is commonly used in conductivity experiments?
A) Copper wire
B) Rubber bands
C) Wood
D) Plastic straws
Which experiment can demonstrate the concept of static electricity?
A) Rubbing a balloon on your hair
B) Mixing oil and water
C) Freezing water
D) Growing plants in different soils
Which experiment demonstrates the expansion of gases when heated?
A) Expanding balloon in hot water
B) Baking soda and vinegar
C) Dissolving salt in water
D) Ice cube melting
Which experiment shows the effects of gravity?
A) Dropping objects of different masses
B) Mixing sugar and water
C) Burning a candle
D) Measuring pH of a solution
What is the main purpose of the “Mentos and soda” experiment?
A) To demonstrate gas release
B) To measure water density
C) To observe liquid evaporation
D) To test magnetism
Which of the following experiments demonstrates the water cycle?
A) Water in a closed plastic bag placed in sunlight
B) Mixing oil and vinegar
C) Floating a boat in water
D) Lighting a match
Which substance is commonly used in growing crystal experiments?
A) Salt
B) Flour
C) Sugar
D) Vinegar
Which scientific principle is demonstrated by the balloon rocket experiment?
A) Newton’s Third Law of Motion
B) Refraction
C) Evaporation
D) Chemical change
Which experiment demonstrates the freezing and melting point of water?
A) Ice cube in a warm room
B) Balloon rocket
C) Leaf chromatography
D) Salt dissolving in water
Which substance is commonly used in an experiment to observe sublimation?
A) Dry ice
B) Table salt
C) Corn syrup
D) Olive oil
Which experiment demonstrates air resistance?
A) Dropping a feather and a stone
B) Melting chocolate
C) Boiling water
D) Mixing oil and water
What does the classic potato clock experiment demonstrate?
A) Generation of electricity from a chemical reaction
B) Changes in mass
C) Water freezing
D) Air pressure
Which experiment demonstrates the concept of surface tension?
A) Floating a paperclip on water
B) Mixing baking soda and vinegar
C) Melting an ice cube
D) Burning a candle
Which experiment is used to demonstrate osmosis?
A) Egg in vinegar
B) Balloon in hot water
C) Mixing oil and vinegar
D) Burning sugar
Which simple experiment demonstrates how sound travels through different mediums?
A) String telephone
B) Melting ice cubes
C) Growing crystals
D) Freezing saltwater
Which chemical reaction is demonstrated when steel wool rusts?
A) Oxidation
B) Sublimation
C) Evaporation
D) Electrolysis
Which experiment demonstrates the difference between conductors and insulators?
A) Creating a simple circuit
B) Mixing food coloring with water
C) Boiling water
D) Freezing oil
What scientific principle is demonstrated by a spinning top?
A) Angular momentum
B) Refraction
C) Buoyancy
D) Conductivity
Which simple demonstration can show the effect of centrifugal force?
A) Spinning a bucket of water
B) Dropping a feather
C) Floating an egg in salt water
D) Burning a piece of paper
Which experiment can demonstrate photosynthesis in plants?
A) Placing a leaf in sunlight and testing for starch
B) Dropping different-sized balls
C) Melting butter
D) Growing sugar crystals
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