NLN PAX EXAM QUESTIONS &
ANSWERS 2024/2025
1 kilogram kg of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final
temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower -
ANSWERSspecific heat
A method for determining the blood alcohol content of a subject is to - ANSWERSuse a Breathalyzer
Gaurd cells which can be found in the leaves of plants are most closely associated with which of these
processes? - ANSWERSEvaporation of water from the plant
If the medulla of the brain in a human was damaged, which of these conditions would most likely result?
- ANSWERSDifficulty in breathing
In ecological succession, the first living thing to colonize a hitherto barren area is called a -
ANSWERSpioneer organism
Night blindness in humans is caused by a lack of - ANSWERSVitamin A
To sterilize a metal probe in the office, a dentist could use a steam sterilizer. If unavailable, the next most
effective method to sterilize the instrument would be - ANSWERSBoiling it in water for 15
In varieties of matter, the term heterogeneous may be applied to - ANSWERSmixtures, but not elements
or compounds
Heat energy is absorbed in which of these phase changes? - ANSWERSBr2 (l) -> Br2 (g)
Iodized salt is used to prevent a human condition known as - ANSWERSgroiter
, Periodontitis is an inflammatory condition of the - ANSWERSgum tissue that surrounds the neck of each
tooth
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major
difference is that - ANSWERShomologous chromosomes are paired
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of -
ANSWERSprotozoans
Which of these conditions is associated with smoking? - ANSWERSEmphysema
Which of these hydrocarbons is a member of the benzene family? - ANSWERSToluene
Which of these organisms use nitrogen directly from the air? - ANSWERSBlue-green algae
Which of these pairs of units measures the same quantity? - ANSWERSCalorie and Joule
Which of these particles can only be found in the nucleus of an atom? - ANSWERSprotons and neutrons
Which of these quantities is a vector of quantity - ANSWERSForce
Which of these quantities is most closely associated with an object's inertia? - ANSWERSMass
Which of these temperatures is known as Absolute Zero? - ANSWERS0°K
Which part of the cell structure controls the passage of materials into and out of the cell? -
ANSWERSPlasma membrane
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her hand. What is
the first action this student should take? - ANSWERSFlush her hand with large quantities of water
ANSWERS 2024/2025
1 kilogram kg of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final
temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower -
ANSWERSspecific heat
A method for determining the blood alcohol content of a subject is to - ANSWERSuse a Breathalyzer
Gaurd cells which can be found in the leaves of plants are most closely associated with which of these
processes? - ANSWERSEvaporation of water from the plant
If the medulla of the brain in a human was damaged, which of these conditions would most likely result?
- ANSWERSDifficulty in breathing
In ecological succession, the first living thing to colonize a hitherto barren area is called a -
ANSWERSpioneer organism
Night blindness in humans is caused by a lack of - ANSWERSVitamin A
To sterilize a metal probe in the office, a dentist could use a steam sterilizer. If unavailable, the next most
effective method to sterilize the instrument would be - ANSWERSBoiling it in water for 15
In varieties of matter, the term heterogeneous may be applied to - ANSWERSmixtures, but not elements
or compounds
Heat energy is absorbed in which of these phase changes? - ANSWERSBr2 (l) -> Br2 (g)
Iodized salt is used to prevent a human condition known as - ANSWERSgroiter
, Periodontitis is an inflammatory condition of the - ANSWERSgum tissue that surrounds the neck of each
tooth
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major
difference is that - ANSWERShomologous chromosomes are paired
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of -
ANSWERSprotozoans
Which of these conditions is associated with smoking? - ANSWERSEmphysema
Which of these hydrocarbons is a member of the benzene family? - ANSWERSToluene
Which of these organisms use nitrogen directly from the air? - ANSWERSBlue-green algae
Which of these pairs of units measures the same quantity? - ANSWERSCalorie and Joule
Which of these particles can only be found in the nucleus of an atom? - ANSWERSprotons and neutrons
Which of these quantities is a vector of quantity - ANSWERSForce
Which of these quantities is most closely associated with an object's inertia? - ANSWERSMass
Which of these temperatures is known as Absolute Zero? - ANSWERS0°K
Which part of the cell structure controls the passage of materials into and out of the cell? -
ANSWERSPlasma membrane
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her hand. What is
the first action this student should take? - ANSWERSFlush her hand with large quantities of water
