NLN PAX SCIENCE EXAM 2023 ACTUAL 300 QUESTIONS
WITH DETAILED VERIFIED ANSWERS WITH
RATIONALE/A+ GRADE ASSURED
1 kg of solid X at 10 C and 1kg 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 - ANSWER: specific heat
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the persons breath contains - ANSWER: Carbon Dioxide
human testes produce - ANSWER: sprematozoa
Night blindness in humans is caused by a lack of - ANSWER: Vitamin A
heat energy is absorbed in which of these phase changes? - ANSWER: Br2 (l) -> Br2
(g)
Iodized salt is used to prevent a human condition known as - ANSWER: Goiter
The organ that filters metabolic waste from the blood is the - ANSWER: kidney
the atoms of an element with seven valence electrons are most probably classified
as - ANSWER: Nonmetals
The process of nuclear cell division in the cell reproduction of plants differs from
mammals. A major difference is that - ANSWER: Cell plates are synthesized
Which of these equations best illustrates a synthesis reaction - ANSWER: 2Na + Cl2 ->
2NaCl one side balanced no pluses or minus
Which of these hydrocarbons is a member of the benzene family? - ANSWER:
Toluene
Which of these organisms use nitrogen directly from the air? - ANSWER: Blue-green
algae
Which of these pairs measures the same quantity? - ANSWER: Calorie and Joules
Which of these processes is responsible for the recorded production of CO2 by yeast
cells from sugar solution? - ANSWER: Anaerobic Respiration
Which of these quantities is most closely associated with an object's inertia? -
ANSWER: Mass
WITH DETAILED VERIFIED ANSWERS WITH
RATIONALE/A+ GRADE ASSURED
1 kg of solid X at 10 C and 1kg 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 - ANSWER: specific heat
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the persons breath contains - ANSWER: Carbon Dioxide
human testes produce - ANSWER: sprematozoa
Night blindness in humans is caused by a lack of - ANSWER: Vitamin A
heat energy is absorbed in which of these phase changes? - ANSWER: Br2 (l) -> Br2
(g)
Iodized salt is used to prevent a human condition known as - ANSWER: Goiter
The organ that filters metabolic waste from the blood is the - ANSWER: kidney
the atoms of an element with seven valence electrons are most probably classified
as - ANSWER: Nonmetals
The process of nuclear cell division in the cell reproduction of plants differs from
mammals. A major difference is that - ANSWER: Cell plates are synthesized
Which of these equations best illustrates a synthesis reaction - ANSWER: 2Na + Cl2 ->
2NaCl one side balanced no pluses or minus
Which of these hydrocarbons is a member of the benzene family? - ANSWER:
Toluene
Which of these organisms use nitrogen directly from the air? - ANSWER: Blue-green
algae
Which of these pairs measures the same quantity? - ANSWER: Calorie and Joules
Which of these processes is responsible for the recorded production of CO2 by yeast
cells from sugar solution? - ANSWER: Anaerobic Respiration
Which of these quantities is most closely associated with an object's inertia? -
ANSWER: Mass
