BTEC APPLIED SCIENCE UNIT 1
CHEMISTRY EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ 2025 – 2026
Muscle fibres are many cells joined together. What
organelles do these cells share? - ANSWERS-Nuclei and
cytoplasm, inside which are many mitochondria and
specialised ER
Why do muscle cells contain many mitochondria? -
ANSWERS-To provide large amounts of energy to the muscle
for contractions
Give the term used to describe the stripy bands seen within
skeletal muscle under a microscope - ANSWERS-Striations
,Myofibril is made up of dark and light bands. What are the
names given to these dark and light bands? - ANSWERS-
Dark band = A-band
Light band = I-band
Which line is present in the middle of the A-band? -
ANSWERS-M line
Which line is present in the middle of the I-band? -
ANSWERS-Z line
Which subshells are available in the third energy level? -
ANSWERS-s, p and d
What is Hund's rule? - ANSWERS-Orbitals must all be singly
filled before they can be doubly occupied
Which elements do not fill the 4s subshell before the 3d
subshell? - ANSWERS-Copper and chromium
Define the term ionic bond - ANSWERS-The electrostatic
attraction between oppositely charged ions
,What is the charge of an ion from group 1? - ANSWERS-+1
What is the charge of an ion from group 2? - ANSWERS-+2
What is the charge of an ion from group 6? - ANSWERS--2
What is the charge of an ion from group 7? - ANSWERS--1
Explain how atoms of sodium react with atoms of chlorine -
ANSWERS-Na loses its 2s1 electron gaining a +ve charge.
Cl gains an electron in the 3p subshell gaining a -ve charge.
The opposite charges attract to form NaCl
Why do ionic bonds have such high melting points? -
ANSWERS-Each +ve ion is surrounded by 6 -ve ions and vice
versa.
Strong electrostatic attraction in every direction.
Requires a large amount of energy to break
State two factors that affect the strength of an ionic bond -
ANSWERS-Size of ion and charge on ion
, When can ionic substances conduct electricity? - ANSWERS-
When molten or in aqueous solution
Describe the properties of ionic compounds - ANSWERS-
Conduct electricity when molten or aqueous solution
High melting/boiling points
Usually soluble in water
Define the term covalent bond - ANSWERS-A shared pair of
electrons
Which metals lose electrons from the 4s subshell before the
3d subshell? - ANSWERS-Transition metals
Why do metals have such high melting points? - ANSWERS-
Strong force of attraction between positive ions and
delocalised electrons. This requires a large amount of
energy to overcome.
State the two factors that affect the strength of metallic
bonding - ANSWERS-Size of ion
Charge on ion
CHEMISTRY EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ 2025 – 2026
Muscle fibres are many cells joined together. What
organelles do these cells share? - ANSWERS-Nuclei and
cytoplasm, inside which are many mitochondria and
specialised ER
Why do muscle cells contain many mitochondria? -
ANSWERS-To provide large amounts of energy to the muscle
for contractions
Give the term used to describe the stripy bands seen within
skeletal muscle under a microscope - ANSWERS-Striations
,Myofibril is made up of dark and light bands. What are the
names given to these dark and light bands? - ANSWERS-
Dark band = A-band
Light band = I-band
Which line is present in the middle of the A-band? -
ANSWERS-M line
Which line is present in the middle of the I-band? -
ANSWERS-Z line
Which subshells are available in the third energy level? -
ANSWERS-s, p and d
What is Hund's rule? - ANSWERS-Orbitals must all be singly
filled before they can be doubly occupied
Which elements do not fill the 4s subshell before the 3d
subshell? - ANSWERS-Copper and chromium
Define the term ionic bond - ANSWERS-The electrostatic
attraction between oppositely charged ions
,What is the charge of an ion from group 1? - ANSWERS-+1
What is the charge of an ion from group 2? - ANSWERS-+2
What is the charge of an ion from group 6? - ANSWERS--2
What is the charge of an ion from group 7? - ANSWERS--1
Explain how atoms of sodium react with atoms of chlorine -
ANSWERS-Na loses its 2s1 electron gaining a +ve charge.
Cl gains an electron in the 3p subshell gaining a -ve charge.
The opposite charges attract to form NaCl
Why do ionic bonds have such high melting points? -
ANSWERS-Each +ve ion is surrounded by 6 -ve ions and vice
versa.
Strong electrostatic attraction in every direction.
Requires a large amount of energy to break
State two factors that affect the strength of an ionic bond -
ANSWERS-Size of ion and charge on ion
, When can ionic substances conduct electricity? - ANSWERS-
When molten or in aqueous solution
Describe the properties of ionic compounds - ANSWERS-
Conduct electricity when molten or aqueous solution
High melting/boiling points
Usually soluble in water
Define the term covalent bond - ANSWERS-A shared pair of
electrons
Which metals lose electrons from the 4s subshell before the
3d subshell? - ANSWERS-Transition metals
Why do metals have such high melting points? - ANSWERS-
Strong force of attraction between positive ions and
delocalised electrons. This requires a large amount of
energy to overcome.
State the two factors that affect the strength of metallic
bonding - ANSWERS-Size of ion
Charge on ion
