Question 1
In fish liver oil, there is:
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Vitamin A only
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Vitamin D only
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Vitamin A and D
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None of these
Explanation:
Fish liver oil contains both Vitamin A for vision and immunity and Vitamin D for bone health.
Question 2
When are day and night equal?
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23rd February and 21st September
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21st March and 23rd September
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23rd March and 21st September
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None of these
Explanation:
Day and night are equal during equinoxes, occurring around March 21 and September 23, when the Sun is directly over the equator.
Question 3
What is the total number of combinations of 9 things taken 3 at a time?
Explanation:
The combinations are calculated using C(9,3)= 3!6!9! =84.
Question 4
The chemical formula for alum is:
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KAl(SO4)2·12H2O
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KSl(SO4)2·12H2O
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KAl(SO4)2·8H2O
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None of these
Explanation:
Potassium alum has the formula KAl(SO₄)₂·12H₂O, containing 12 water molecules of crystallization.
Question 5
If the radius of a circle is increased three times, then its area is increased:
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Three times
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Six times
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Nine times
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None of these
Explanation:
Since area is proportional to the square of radius, tripling the radius increases the area by 3
2 =9 times.
Question 6
One degree of longitude on the equator is equal to a distance of:
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49 miles
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69 miles
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39 miles
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60 miles
Explanation:
At the equator, one degree of longitude corresponds to approximately 69 miles based on Earth’s circumference.
Question 7
The protein molecule is made of:
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Alkaloids
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Short-range chain of amino acids
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Long-range chain of amino acids
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None of these
Explanation:
Proteins are composed of long chains of amino acids linked by peptide bonds, forming complex structures.
Question 8
The minimum amount of vitamin stored in the human body is:
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Vitamin D
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Vitamin K
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Vitamin E
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Vitamin C
Explanation:
Vitamin C is water-soluble and not stored significantly in the body, requiring regular intake.
Question 9
The isotopes of an element contain an equal number of:
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Protons
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Neutrons
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Both electrons and protons
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None of these
Explanation:
Isotopes have the same number of protons but differ in the number of neutrons.
Question 10
The pH of soil is raised using:
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Limestone
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Gypsum
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Urea
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None of these
Explanation:
Limestone neutralizes acidic soil and raises its pH.
Question 11
Which of the following is used for measuring distance?
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Coulomb
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Light Year
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Farad
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Curie
Explanation:
A light year measures astronomical distance, defined as the distance light travels in one year.
Question 12
Which of the following contains the greatest number of carbon atoms in one mole of each compound?
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Chloroform
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Methanol
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Water
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Ethanol
Explanation:
Ethanol contains two carbon atoms per molecule, giving the highest number of carbon atoms per mole.
Question 13
A pencil dipped in water appears bent due to:
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Reflection
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Diffraction
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Refraction
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None of these
Explanation:
Refraction occurs when light changes direction as it passes from water to air, making the pencil appear bent.
Question 14
Fishes die outside water due to:
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Carbon monoxide
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Lack of oxygen
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Sunlight
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Non-absorption of oxygen
Explanation:
Fish cannot absorb oxygen outside water as their gills collapse, preventing oxygen uptake.
Question 15
In dementia, a person:
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Loses their weight
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Loses thinking and writing
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Loses thinking, remembering, and reasoning
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All of these
Explanation:
Dementia primarily affects cognitive functions such as thinking, memory, and reasoning.
Question 16
An earthquake is measured by the instrument:
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Wave guide
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Barometer
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Seismograph
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Hydrometer
Explanation:
A seismograph records and measures seismic waves generated by earthquakes.
Question 17
A cyclone is formed:
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When the warm air rises upward over the ocean
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When the moist air rises upward over the ocean
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When the moist air is pressed downward over the ocean
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When the warm air is pressed downward over the ocean
Explanation:
Cyclones form when warm, moist air rises over oceans, creating low-pressure systems and storms.
Question 18
Why is red light used in traffic signals for danger?
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Due to the short wavelength
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Due to high frequency
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It has a long wavelength and a high frequency
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It has a long wavelength and short frequency
Explanation:
Red light has a long wavelength and low frequency, making it less scattered and visible from longer distances.
Question 19
Heavy water is:
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Denoted by D2O and contains simple hydrogen
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Denoted by H2O and contains deuterium
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Denoted by D2O and contains deuterium
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Denoted by H2O and contains simple hydrogen
Explanation:
Heavy water (D₂O) contains deuterium, a heavier isotope of hydrogen.
Question 20
The ionosphere is located within the thermosphere and extends:
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From 60–300 km above the Earth's surface
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From 50–200 km above the Earth's surface
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From 50–300 km above the Earth's surface
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None of these
Explanation:
The ionosphere extends roughly from 50 to 300 km above Earth and contains ionized particles important for radio communication.