Q. What is the effect of increased pressure on the solubility of gases in liquids?
-
A.
Increases solubility
-
B.
Decreases solubility
-
C.
No effect
-
D.
Varies by gas type
Solution
Increased pressure generally increases the solubility of gases in liquids, as described by Henry's Law.
Correct Answer:
A
— Increases solubility
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Q. What is the function of ribosomes in a cell?
-
A.
To synthesize lipids
-
B.
To produce ATP
-
C.
To synthesize proteins
-
D.
To store waste
Solution
Ribosomes are responsible for protein synthesis in the cell.
Correct Answer:
C
— To synthesize proteins
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Q. What is the function of the myelin sheath?
-
A.
Protects neurons
-
B.
Transmits signals
-
C.
Stores neurotransmitters
-
D.
Regulates blood flow
Solution
The myelin sheath protects neurons and helps speed up the transmission of electrical signals.
Correct Answer:
A
— Protects neurons
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Q. What is the least common multiple (LCM) of 12 and 15?
Solution
The LCM of 12 and 15 is 60, as 60 is the smallest number that both 12 and 15 divide evenly into.
Correct Answer:
B
— 60
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Q. What is the least common multiple (LCM) of 4 and 6?
Solution
LCM of 4 and 6 is 12.
Correct Answer:
A
— 12
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Q. What is the length of the hypotenuse of a right triangle with legs of 3 cm and 4 cm?
-
A.
5 cm
-
B.
7 cm
-
C.
6 cm
-
D.
8 cm
Solution
Using Pythagorean theorem: hypotenuse = √(3² + 4²) = √(9 + 16) = √25 = 5 cm.
Correct Answer:
A
— 5 cm
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Q. What is the main byproduct of incomplete combustion that poses health risks?
-
A.
Carbon Dioxide
-
B.
Carbon Monoxide
-
C.
Methane
-
D.
Nitrogen Oxides
Solution
Carbon Monoxide is the main byproduct of incomplete combustion that poses health risks.
Correct Answer:
B
— Carbon Monoxide
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Q. What is the main component of coal that poses a risk to human health?
-
A.
Methane
-
B.
Benzene
-
C.
Polycyclic aromatic hydrocarbons
-
D.
Formaldehyde
Solution
Polycyclic aromatic hydrocarbons (PAHs) are harmful compounds found in coal that can lead to cancer.
Correct Answer:
C
— Polycyclic aromatic hydrocarbons
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Q. What is the main component of stainless steel?
-
A.
Iron
-
B.
Copper
-
C.
Nickel
-
D.
Chromium
Solution
The main component of stainless steel is Iron, along with Chromium and Nickel.
Correct Answer:
A
— Iron
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Q. What is the main function of the pancreas?
-
A.
Produce insulin
-
B.
Filter blood
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C.
Store bile
-
D.
Regulate heart rate
Solution
The main function of the pancreas is to produce insulin, which regulates blood sugar levels.
Correct Answer:
A
— Produce insulin
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Q. What is the main purpose of the placenta in mammals?
-
A.
To produce hormones
-
B.
To provide oxygen and nutrients to the fetus
-
C.
To protect the fetus from infections
-
D.
To facilitate childbirth
Solution
The main purpose of the placenta in mammals is to provide oxygen and nutrients to the fetus.
Correct Answer:
B
— To provide oxygen and nutrients to the fetus
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Q. What is the main purpose of using electrolysis in the extraction of metals?
-
A.
To purify water
-
B.
To separate elements
-
C.
To generate electricity
-
D.
To produce heat
Solution
The main purpose of using electrolysis in the extraction of metals is to separate elements from their ores.
Correct Answer:
B
— To separate elements
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Q. What is the measure of each interior angle of a regular hexagon?
-
A.
120°
-
B.
90°
-
C.
60°
-
D.
150°
Solution
Each interior angle = (n-2) * 180° / n = (6-2) * 180° / 6 = 120°.
Correct Answer:
A
— 120°
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Q. What is the melting point of pure gold?
-
A.
1064 °C
-
B.
960 °C
-
C.
1200 °C
-
D.
800 °C
Solution
The melting point of pure gold is 1064 °C.
Correct Answer:
A
— 1064 °C
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Q. What is the minimum number of edges required to connect 7 vertices in a tree structure?
Solution
A tree with n vertices has exactly n-1 edges. For 7 vertices, it requires 7-1 = 6 edges.
Correct Answer:
A
— 6
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Q. What is the next number in the sequence: 2, 4, 8, 16, ...?
Solution
The pattern is multiplying by 2; 16 × 2 = 32.
Correct Answer:
C
— 32
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Q. What is the normal range for adult human body temperature?
-
A.
35.0 - 36.5 °C
-
B.
36.5 - 37.5 °C
-
C.
37.5 - 38.5 °C
-
D.
38.5 - 39.5 °C
Solution
The normal range for adult human body temperature is typically 36.5 - 37.5 °C.
Correct Answer:
B
— 36.5 - 37.5 °C
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Q. What is the perimeter of a rectangle with a length of 8 cm and a width of 4 cm?
-
A.
24 cm
-
B.
32 cm
-
C.
20 cm
-
D.
16 cm
Solution
Perimeter = 2 * (length + width) = 2 * (8 + 4) = 24 cm.
Correct Answer:
A
— 24 cm
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Q. What is the perimeter of a regular hexagon with a side length of 3 cm?
-
A.
18 cm
-
B.
15 cm
-
C.
12 cm
-
D.
21 cm
Solution
Perimeter = 6 * side = 6 * 3 = 18 cm.
Correct Answer:
A
— 18 cm
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Q. What is the perimeter of a square with a side length of 6 cm?
-
A.
24 cm
-
B.
12 cm
-
C.
18 cm
-
D.
30 cm
Solution
Perimeter = 4 * side = 4 * 6 = 24 cm.
Correct Answer:
A
— 24 cm
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Q. What is the phenomenon called when sound waves bend around obstacles?
-
A.
Refraction
-
B.
Diffraction
-
C.
Reflection
-
D.
Absorption
Solution
Diffraction is the bending of sound waves around obstacles.
Correct Answer:
B
— Diffraction
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Q. What is the pressure exerted by a 10 kg weight resting on a 2 m² area?
-
A.
5 Pa
-
B.
10 Pa
-
C.
50 Pa
-
D.
100 Pa
Solution
Pressure is calculated as force (weight) divided by area. Here, pressure = (10 kg * 9.81 m/s²) / 2 m² = 49.05 Pa, approximately 50 Pa.
Correct Answer:
C
— 50 Pa
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Q. What is the primary cause of a tornado?
-
A.
High humidity
-
B.
Cold fronts
-
C.
Earthquakes
-
D.
Volcanic activity
Solution
Tornadoes are primarily caused by severe thunderstorms, particularly when cold fronts collide with warm, moist air.
Correct Answer:
B
— Cold fronts
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Q. What is the primary cause of a volcanic eruption?
-
A.
Tectonic plate movement
-
B.
Weather changes
-
C.
Ocean currents
-
D.
Solar activity
Solution
Volcanic eruptions are primarily caused by the movement of tectonic plates, which can lead to magma rising to the surface.
Correct Answer:
A
— Tectonic plate movement
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Q. What is the primary chemical process that occurs during electrolysis?
-
A.
Oxidation
-
B.
Reduction
-
C.
Decomposition
-
D.
Synthesis
Solution
The primary chemical process that occurs during electrolysis is decomposition, where compounds are broken down into their constituent elements.
Correct Answer:
C
— Decomposition
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Q. What is the primary component of natural gas used in combustion?
-
A.
Propane
-
B.
Butane
-
C.
Methane
-
D.
Ethane
Solution
The primary component of natural gas used in combustion is Methane.
Correct Answer:
C
— Methane
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Q. What is the primary concern of friction in orthopedic implants?
-
A.
Increased wear and tear
-
B.
Improved integration
-
C.
Reduced pain
-
D.
Enhanced mobility
Solution
Increased friction can lead to wear and tear of orthopedic implants, affecting their longevity.
Correct Answer:
A
— Increased wear and tear
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Q. What is the primary effect of friction on human skin during a medical procedure?
-
A.
Increases blood flow
-
B.
Causes abrasion
-
C.
Reduces pain
-
D.
Enhances healing
Solution
Friction can cause abrasion on the skin, leading to potential injury or irritation.
Correct Answer:
B
— Causes abrasion
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Q. What is the primary environmental concern associated with coal mining?
-
A.
Air pollution
-
B.
Water contamination
-
C.
Deforestation
-
D.
Soil erosion
Solution
Water contamination is a significant environmental concern due to runoff from coal mining operations.
Correct Answer:
B
— Water contamination
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Q. What is the primary force that helps blood circulate through the body?
-
A.
Gravity
-
B.
Friction
-
C.
Cardiac force
-
D.
Inertia
Solution
The primary force that helps blood circulate through the body is the cardiac force generated by the heart.
Correct Answer:
C
— Cardiac force
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