MCQ on Class 4 Elements Compounds and Mixtures

MCQ on Class 4 Elements Compounds and Mixtures

 

    What are the smaller components/units of substances called?

1. a) Molecules
2. b) Atoms
3. c) Particles
4. d) Elements

    Answer: b) Atoms

 

    What are substances called when they are made up of the same type of components?

1. a) Compound
2. b) Mixture
3. c) Element
4. d) Solution

    Answer: c) Element

 

    What are substances called when they are made up of different types of components?

1. a) Compound
2. b) Mixture
3. c) Element
4. d) Solution

    Answer: a) Compound

 

    Which state of matter has a definite shape and volume?

1. a) Solid
2. b) Liquid
3. c) Gas
4. d) Plasma

    Answer: a) Solid

 

    Which state of matter takes the shape of its container but has a definite volume?

1. a) Solid
2. b) Liquid
3. c) Gas
4. d) Plasma

    Answer: b) Liquid

 

 

    What is the smallest indivisible particle of a substance according to scientists?

1. a) Molecule
2. b) Atom
3. c) Compound
4. d) Element

    Answer: b) Atom

 

    What is the Greek origin of the term “atom”?

1. a) Indivisible
2. b) Particle
3. c) Element
4. d) Compound

    Answer: a) Indivisible

 

    What is the strong force of attraction that holds atoms together in a molecule called?

1. a) Gravity
2. b) Magnetic force
3. c) Chemical bond
4. d) Atomic bond

    Answer: c) Chemical bond

 

    How many elements are found on Earth according to the passage?

1. a) 68
2. b) 118
3. c) 100
4. d) 150

    Answer: b) 118

 

    Which statement about elements is true?

1. a) Elements can be broken down into simpler substances.
2. b) Elements are made up of different kinds of atoms.
3. c) Elements can exist in solid, liquid, and gaseous states.
4. d) Elements are held together by chemical bonds.

    Answer: c) Elements can exist in solid, liquid, and gaseous states.

 

 

    What is the smallest part of a substance that retains all the properties of that substance?

1. a) Compound
2. b) Molecule
3. c) Atom
4. d) Element

    Answer: c) Atom

 

   

    What determines the properties of an atom?

1. a) Its size
2. b) Its mass
3. c) Its atomic number
4. d) Its position in the periodic table

    Answer: c) Its atomic number

 

    Which statement about elements is correct?

1. a) Elements can combine to form compounds.
2. b) Elements cannot exist in the gaseous state.
3. c) Elements have the same properties regardless of their composition.
4. d) Elements are always composed of molecules.

    Answer: a) Elements can combine to form compounds.

 

    How many atoms are typically present in a molecule?

1. a) One
2. b) Two
3. c) Three or more
4. d) It varies depending on the substance

    Answer: c) Three or more

 

    What is a compound?

1. a) A substance formed by the physical mixing of two or more elements.
2. b) A substance formed when elements chemically combine in a definite proportion.
3. c) A substance made up of only one type of atom.
4. d) A substance that cannot be broken down into simpler substances.

    Answer: b) A substance formed when elements chemically combine in a definite proportion.

 

    What is the constituent element of table salt (common salt)?

1. a) Sodium and Chlorine
2. b) Sodium and Oxygen
3. c) Hydrogen and Oxygen
4. d) Carbon and Oxygen

    Answer: a) Sodium and Chlorine

 

    What determines the properties of a compound?

1. a) Its constituent elements
2. b) Its atomic number
3. c) Its position in the periodic table
4. d) Its molecular weight

    Answer: a) Its constituent elements

 

   

    How can compounds be separated?

1. a) By physical means
2. b) By chemical means
3. c) By heating
4. d) By filtration

    Answer: b) By chemical means

 

 

    What is the smallest indivisible particle of matter according to scientists?

1. a) Molecule
2. b) Compound
3. c) Atom
4. d) Element

    Answer: c) Atom

 

    What is the name of the force that holds atoms together in a molecule?

1. a) Magnetic force
2. b) Chemical bond
3. c) Gravitational force
4. d) Nuclear force

    Answer: b) Chemical bond

 

    How many atoms are typically found in most molecules?

1. a) One
2. b) Two
3. c) Three or more
4. d) It varies depending on the substance

    Answer: c) Three or more

 

   

    How many elements are found on Earth according to the passage?

1. a) 100
2. b) 118
3. c) 150
4. d) 200

    Answer: b) 118

 

   

    Which compound is formed by the combination of sodium and chlorine?

1. a) Baking soda
2. b) Ammonia
3. c) Methane
4. d) Table salt (common salt)

    Answer: d) Table salt (common salt)

 

    What is the constituent element of carbon dioxide?

1. a) Sodium
2. b) Hydrogen
3. c) Oxygen
4. d) Chlorine

    Answer: c) Oxygen

 

    How can compounds be separated?

1. a) By physical means
2. b) By chemical means
3. c) By heating
4. d) By filtration

    Answer: b) By chemical means

 

   

    What is water composed of?

1. a) Hydrogen and Oxygen
2. b) Sodium and Chlorine
3. c) Carbon and Oxygen
4. d) Nitrogen and Hydrogen

    Answer: a) Hydrogen and Oxygen

 

    What is the state of water?

1. a) Solid
2. b) Liquid
3. c) Gas
4. d) Plasma

    Answer: b) Liquid

 

    Which substance supports burning but does not burn itself?

1. a) Hydrogen
2. b) Oxygen
3. c) Carbon monoxide
4. d) Carbon dioxide

    Answer: b) Oxygen

 

    Which of the following examples represents a compound in the liquid state?

1. a) Carbon monoxide
2. b) Carbon dioxide
3. c) Hydrochloric acid
4. d) Baking soda

    Answer: c) Hydrochloric acid

 

• MCQ on Class 4 Science Vegetative Propagation
• MCQ on Class 4 Science Plant Adaptations
• MCQ on Class 4 How do Plants make food