What determines the properties of a compound?
- a) Its constituent elements
- b) Its atomic number
- c) Its position in the periodic table
- d) Its molecular weight
Answer: a) Its constituent elements
How can compounds be separated?
- a) By physical means
- b) By chemical means
- c) By heating
- d) By filtration
Answer: b) By chemical means
What is the smallest indivisible particle of matter according to scientists?
- a) Molecule
- b) Compound
- c) Atom
- d) Element
Answer: c) Atom
What is the name of the force that holds atoms together in a molecule?
- a) Magnetic force
- b) Chemical bond
- c) Gravitational force
- d) Nuclear force
Answer: b) Chemical bond
How many atoms are typically found in most molecules?
- a) One
- b) Two
- c) Three or more
- d) It varies depending on the substance
Answer: c) Three or more
How many elements are found on Earth according to the passage?
- a) 100
- b) 118
- c) 150
- d) 200
Answer: b) 118
Which compound is formed by the combination of sodium and chlorine?
- a) Baking soda
- b) Ammonia
- c) Methane
- d) Table salt (common salt)
Answer: d) Table salt (common salt)
What is the constituent element of carbon dioxide?
- a) Sodium
- b) Hydrogen
- c) Oxygen
- d) Chlorine
Answer: c) Oxygen
How can compounds be separated?
- a) By physical means
- b) By chemical means
- c) By heating
- d) By filtration
Answer: b) By chemical means
What is water composed of?
- a) Hydrogen and Oxygen
- b) Sodium and Chlorine
- c) Carbon and Oxygen
- d) Nitrogen and Hydrogen
Answer: a) Hydrogen and Oxygen
What is the state of water?
- a) Solid
- b) Liquid
- c) Gas
- d) Plasma
Answer: b) Liquid
Which substance supports burning but does not burn itself?
- a) Hydrogen
- b) Oxygen
- c) Carbon monoxide
- d) Carbon dioxide
Answer: b) Oxygen
Which of the following examples represents a compound in the liquid state?
- a) Carbon monoxide
- b) Carbon dioxide
- c) Hydrochloric acid
- d) Baking soda
Answer: c) Hydrochloric acid
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