Chemistry Quiz for Class 7
- Question of
What is a compound?
- A combination of 2 or more elements
- A combination only of 3 elements
- The simplest form of a substance
- Question of
What is a mixture?
- A combination of substances in which the atoms of the substance do not chemically combine
- A combination of substances where new substances are formed through a reaction
- A combination of elements to make a new substance
- Question of
What would you be able to do with a filter, magnet, or strainer when thinking about a mixture?
- Separate them
- Combine them chemically
- Combine them physically
- Question of
What is a substance that is dissolved in another substance?
- Solute
- Solvent
- Solution
- Question of
A usually liquid substance capable of dissolving or dispersing one or more other substances?
- Solvent
- Solute
- Solution
- Question of
A homogeneous mixture of one or more solutes dissolved in a solvent?
- Solution
- Solvent
- Solute
- Question of
What is the simplest form that cannot be broken down to anything simpler?
- Element
- Compound
- Solution
- Question of
How are solutions and mixtures alike?
- They are a combination of substances
- They are both chemically combined
- They can be separated immediately
- Question of
How are mixtures and solutions different form each other?
- The mixture combines physically and the solution is not easily separated
- They have more than one elements in them
- Once combines chemically the other combines electronically
- Question of
To separate a mixture of soil and water what separation method is used?
- Filtration
- Evaporation
- Distillation
- Question of
To separate a mixture of salt and water what separation method is used?
- Evaporation
- Distillation
- Filtration
- Question of
Which of the following is not a separation technique?
- Stirring
- Hand Sorting
- Chromatography
- Question of
Chemical name of Rust is?
- Ferric oxide
- Ferrous oxide
- Magnetite
- Question of
Chemical name of baking soda is?
- Sodium hydrogen carbonate
- Magnesium hydroxide
- Calcium carbonate
- Question of
Complete the reaction. Iron + _____ + Water —–>?
- Oxygen, Iron oxide
- Nitrogen, Carbon dioxide
- Oxygen, Iodide
- Question of
Stainless steel is a mixture of iron with?
- Carbon and other metals
- Magnesium with nickel
- Chromium with manganese
- Question of
Common examples of bases include?
- Detergent, antacids and shampoo
- Soap, ammonia and sodas
- Lemons, vinegar and bleach
- Question of
If a substance turns blue litmus paper red, and does not change red litmus paper, it is:
- An acid
- A base
- Neutral
- Question of
O2 + 2H2 –> 2H2O In this equation, the O2 is a ______.
- reactant
- product
- mixture
- Question of
Which statement is true about acids?
- Acids have a pH below 7.
- All acids can harm you.
- Acids are slippery and taste bitter.
- Question of
What is the most common element in the human body?
- Oxygen
- Carbon
- Carbon dioxide
- Question of
The center or core of an atom is called ______.
- a nucleus
- a neutron
- an atoms
- Question of
These have the same number of protons in each atom but the neutron numbers can vary.
- Isotopes
- Elements
- Atomic numbers
- Question of
This is a particle that carries a negative electrical charge.
- Electron
- Proton
- Neutron
- Question of
This is a particle that carries a positive electrical charge.
- Proton
- Neutron
- Electron
- Question of
This contains a dense central nucleus that is surrounded by a cloud of negatively charged electrons.
- Atom
- Neutron
- Proton
- Question of
The study of the composition, structure, properties and change of matter is known as ______.
- chemistry
- physics
- atoms
- Question of
A substance that consists of a single type of atom is ______.
- a chemical element
- an element
- an isotope
- Question of
The number of protons in the nucleus of an atom is known as the ______.
- atomic number
- subatomic hadron particle
- nucleon
- Question of
Any substance that cannot be broken into two or more simpler substances is known as ______.
- an element
- a chemical element
- an isotope