Physical and Chemical activity
What is the difference between a physical property and a chemical property?
A) A physical property changes the substance's identity.
B) A chemical property does not change the substance.
C) A physical property can be observed without changing the substance’s identity.
D) A chemical property describes a substance's state of matter.
C) A physical property can be observed without changing the substance’s identity.
Which element has the chemical symbol "C"?
A) Calcium
B) Chlorine
C) Carbon
D) Cobal
C) Carbon
What does the Law of Conservation of Mass state?
A) Mass can be created but not destroyed.
B) Mass can be destroyed but not created.
C) Mass is conserved during a chemical reaction.
D) Mass increases during a chemical reaction.
D) Mass increases during a chemical reaction.
What is the definition of a period on the periodic table?
A) A vertical column of elements
B) A horizontal row of elements
C) A group of nonmetals
D) A set of alkali metals
B) A horizontal row of elements
Carbon Group...............................
carbon forms the backbone of all organic compounds. The ability of carbon to bond with itself and other elements makes it the building block of life.
Which of the following is an example of a chemical property?
A) Density
B) Melting point
C) Flammability
D) Solubility
C) Flammability
What is the formula for calculating density?
A) Mass ÷ Volume
B) Mass × Volume
C) Volume ÷ Mass
D) Mass + Volum
B) Mass × Volume
Which element is NOT commonly found in organic compounds?
A) Sulfur
B) Phosphorus
C) Chlorine
D) Oxygen
C) Chlorine
Which group on the periodic table contains carbon?
A) Group 1
B) Group 14
C) Group 18
D) Group 2
B) Group 14
Hydrocarbon Chain..........................
These compounds are the simplest organic compounds and form long chains
What type of bond allows carbon to form complex organic molecules?
A) Covalent bonds
B) Ionic bonds
C) Metallic bonds
D) Hydrogen bonds
A) Covalent bonds
What is the characteristic structure of graphite?
A) Hexagonal layers
B) Crystal lattice
C) Spherical clusters
D) Branched chains
Hexagonal layers
Which form of pure carbon is the hardest?
A) Graphite
B) Diamond
C) Fullerene
D) Amorphous carbon
B) Diamond
Which type of carbon-based molecule is typically used as fuel?
A) Saturated hydrocarbons
B) Unsaturated hydrocarbons
C) Aromatic hydrocarbons
D) Hydrocarbons
D) Hydrocarbons
Saturated Hydrocarbon.....................
contain only single bonds........
What type of bond is present in saturated hydrocarbons?
A) Single bonds
B) Double bonds
C) Triple bonds
D) Ionic bonds
A) Single bonds
What type of hydrocarbon has at least one double bond between carbon atoms?
A) Saturated hydrocarbon
B) Unsaturated hydrocarbon
C) Aromatic hydrocarbon
D) Alkyne
B) Unsaturated hydrocarbon
What prefix is used for a hydrocarbon chain with three carbon atoms?
A) Meth-
B) Eth-
C) Prop-
D) But-
C) Prop-
Which of the following substances is an organic compound?
A) Water (H₂O)
B) Sodium chloride (NaCl)
C) Methane (CH₄)
D) Carbon dioxide (CO₂)
C) Methane (CH₄)
Graphite..................
a soft and slippery due to its layered structure
Which of the following is a property of alkanes?
A) They contain double bonds
B) They are unsaturated hydrocarbons
C) They contain only single bonds
D) They contain triple bonds
C) They contain only single bonds
What is a hydrocarbon?
A) A compound made only of hydrogen and oxygen
B) A compound made only of carbon and hydrogen
C) A compound containing carbon and nitrogen
D) A compound made only of carbon and phosphorus
B) A compound made only of carbon and hydrogen
What element is found in all organic compounds?
A) Oxygen
B) Hydrogen
C) Carbon
D) Nitrogen
C) Carbon
What is the significance of carbon-carbon bonding in hydrocarbons?
A) It allows hydrocarbons to be soluble in water.
B) It enables hydrocarbons to form long chains and rings.
C) It prevents hydrocarbons from being reactive.
D) It makes hydrocarbons brittle.
B) It enables hydrocarbons to form long chains and rings.
Unsaturated Hydrocarbon...................
contain one or more double or triple bonds