MCQ on Class 4 Elements Compounds and Mixtures
What are the smaller components/units of substances called?
- a) Molecules
- b) Atoms
- c) Particles
- d) Elements
Answer: b) Atoms
What are substances called when they are made up of the same type of components?
- a) Compound
- b) Mixture
- c) Element
- d) Solution
Answer: c) Element
What are substances called when they are made up of different types of components?
- a) Compound
- b) Mixture
- c) Element
- d) Solution
Answer: a) Compound
Which state of matter has a definite shape and volume?
- a) Solid
- b) Liquid
- c) Gas
- d) Plasma
Answer: a) Solid
Which state of matter takes the shape of its container but has a definite volume?
- a) Solid
- b) Liquid
- c) Gas
- d) Plasma
Answer: b) Liquid
What is the smallest indivisible particle of a substance according to scientists?
- a) Molecule
- b) Atom
- c) Compound
- d) Element
Answer: b) Atom
What is the Greek origin of the term “atom”?
- a) Indivisible
- b) Particle
- c) Element
- d) Compound
Answer: a) Indivisible
What is the strong force of attraction that holds atoms together in a molecule called?
- a) Gravity
- b) Magnetic force
- c) Chemical bond
- d) Atomic bond
Answer: c) Chemical bond
How many elements are found on Earth according to the passage?
- a) 68
- b) 118
- c) 100
- d) 150
Answer: b) 118
Which statement about elements is true?
- a) Elements can be broken down into simpler substances.
- b) Elements are made up of different kinds of atoms.
- c) Elements can exist in solid, liquid, and gaseous states.
- 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?
- a) Compound
- b) Molecule
- c) Atom
- d) Element
Answer: c) Atom
What determines the properties of an atom?
- a) Its size
- b) Its mass
- c) Its atomic number
- d) Its position in the periodic table
Answer: c) Its atomic number
Which statement about elements is correct?
- a) Elements can combine to form compounds.
- b) Elements cannot exist in the gaseous state.
- c) Elements have the same properties regardless of their composition.
- d) Elements are always composed of molecules.
Answer: a) Elements can combine to form compounds.
How many atoms are typically present in a molecule?
- a) One
- b) Two
- c) Three or more
- d) It varies depending on the substance
Answer: c) Three or more
What is a compound?
- a) A substance formed by the physical mixing of two or more elements.
- b) A substance formed when elements chemically combine in a definite proportion.
- c) A substance made up of only one type of atom.
- 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)?
- a) Sodium and Chlorine
- b) Sodium and Oxygen
- c) Hydrogen and Oxygen
- d) Carbon and Oxygen
Answer: a) Sodium and Chlorine