# Law of Mass Action Class 8 MCQ Science

30 Questions 20 Mins

This Law of Mass Action Class 8 MCQ test contains random 30 Objective Questions. You have select one correct answer among given options.

## Law of Mass Action Class 8 MCQ With Answers

### 1. Which of these is not a chemical reaction?

• Burning of wood
• Mixing vinegar and baking soda
• Melting of ice

### 2. When an unbalanced force acts on an object, the force ______________________.

• changes the motion of the object
• does not change the motion of an object
• is cancelled by another force
• is equal to the weight of the object

• 8N
• 1.6N
• 0.6N
• 15N

• 4g
• 5g
• 9g
• 14g

• False
• True

• Mg and O
• MgO
• Mg and MgO
• O and MgO

### 7. If you increase the mass on an object, its acceleration

• decreases
• stays the same
• also increases
• stops

• Sleeping
• Playing tag
• Running
• Tug of war

• Velocity
• Force
• Acceleration
• Mass

### 10. Which law best explain how boats work ?

• Third law
• Gravitational pull
• Second law
• First law

• 50N
• 5N
• 12.5N
• 100N

### 12. A person not paying attention while skateboarding hits a rock. The skatboard stops... the don't

• Law of acceleration
• Law of inertia
• Law of momentum
• Gravitational force

### 13. When all the forces on an object are equal or opposite, and the net force is zero, that's .....

• balanced force
• terminal velocity
• unbalanced forces
• reaction forces

### 14. What types of systems are there?

• Mechanical and Electrical Systems
• Inside and Outside Systems
• Open and Closed Systems
• Human and Machine Systems

### 15. Newton's law of motion describes the relationship of force, mass, and acceleration. Write the equation.

• M=F/A
• F=MA
• A= F/M
• All of the above

### 16. This person bought coffee and put it on the seat next to them. If they stopped quickly and the coffee spilled which law would that represent?

• Newton's 1st Law
• Newton's 3rd Law
• Newton's 2nd Law
• Newton's 3rd law

### 17. If you increase the force on an object, its acceleration?

• decreases
• stays the same
• also increases
• stops

### 18. Look at this scenario, which law does this represent?

• Law of Inertia
• Law of Force and Acceleration
• Law of Action-Reaction

### 19. If you increase the mass on an object, its acceleration

• decreases
• stays the same
• also increases
• stops

• 50 g
• 100 g
• 200 g
• 400 g

### 21. What are Newton's 3 Laws?

• Law of Action-Reaction, Law of Inertia and Law of Velocity
• Law of Speed, Law of Action-Reaction, Law of Force and Acceleration
• Law of Inertia, Law of Force and Acceleration, and Law of Action-Reaction
• Law of Mass and Acceleration, Law of Action-Reaction, and Law of Inertia

### 22. This type of system allows matter to flow freely in and out...

• Closed System
• Open System

• True
• False

• False
• True

### 25. Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

• Force
• Velocity
• Mass
• Gravity

• Subscript
• Superscript
• Coefficient
• Charge

• Gravity
• Velocity
• Acceleration
• Inertia

### 29. When an unbalanced force acts on an object, the force ______________________.

• changes the motion of the object
• does not change the motion of an object
• is cancelled by another force
• is equal to the weight of the object

• Gravity
• Velocity
• Acceleration
• Inertia