CSS - PMS - CCE - PCS - General Science
Periodic Table - Metals & Non-metals
The hardest natural substance is:
A. Gold
B. Iron
C. Diamond
D. Silver
Correct Answer: C
Diamond is the hardest naturally occurring material.
CSS - PMS - CCE - PCS - General Science
Chemical Reactions - Oxidation & Reduction
The chemical formula of water is:
A. CO₂
B. H₂O
C. O₂
D. H₂SO₄
Correct Answer: B
Water consists of two hydrogen and one oxygen atom.
CSS - PMS - CCE - PCS - General Science
Heat & Thermodynamics - Temperature
Water freezes at:
A. 0°C
B. 5°C
C. -5°C
D. 10°C
Correct Answer: A
Water changes into ice at 0°C.
CSS - PMS - CCE - PCS - General Science
Heat & Thermodynamics - Temperature
Water boils at:
A. 90°C
B. 95°C
C. 100°C
D. 110°C
Correct Answer: C
At standard atmospheric pressure.
CSS - PMS - CCE - PCS - General Science
Human Body System
Which organ purifies blood in the human body?
A. Heart
B. Liver
C. Kidney
D. Lungs
Correct Answer: C
Kidneys filter waste products from blood.
CSS - PMS - CCE - PCS - General Science
Vitamins
Which vitamin is produced by sunlight?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Correct Answer: D
Skin produces Vitamin D when exposed to sunlight.
CSS - PMS - CCE - PCS - General Science
Human Health
The normal body temperature of a healthy human is:
A. 35°C
B. 37°C
C. 39°C
D. 40°C
Correct Answer: B
Average body temperature is 37°C (98.6°F).
CSS - PMS - CCE - PCS - General Science
Blood System
Human blood is red due to:
A. Chlorophyll
B. Hemoglobin
C. Plasma
D. Platelets
Correct Answer: B
Hemoglobin contains iron, giving blood its red color.
CSS - PMS - CCE - PCS - General Science
Which gas is most abundant in Earth's atmosphere?
A. Oxygen
B. Carbon Dioxide
C. Nitrogen
D. Hydrogen
Correct Answer: C
Nitrogen makes up about 78% of the atmosphere.
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
The nearest star to Earth is:
A. Sirius
B. Alpha Centauri
C. Sun
D. Polaris
Correct Answer: C
The Sun is Earth's nearest star.
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
The largest planet in the Solar System is:
A. Saturn
B. Earth
C. Jupiter
D. Neptune
Correct Answer: C
Jupiter is the largest planet.
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
Which planet is known as the Red Planet?
A. Venus
B. Mars
C. Jupiter
D. Mercury
Correct Answer: B
Mars appears red due to iron oxide on its surface.
CSS - PMS - CCE - PCS - General Science
Measurement Units
The SI unit of power is:
A. Watt
B. Joule
C. Newton
D. Ampere
Correct Answer: A
Power is measured in Watts (W).
CSS - PMS - CCE - PCS - General Science
Which is the most abundantly found metal on the earth surface?
A. Aluminium
B. Zinc
C. Iron
D. Silicon
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
Which is the brightest planet in the solar system?
A. Jupiter
B. Mercury
C. Uranus
D. Venus
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
The planet nearest to the earth is
A. Mercury
B. Jupiter
C. Venus
D. None of These
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
The planet which revolves very slowly around the sun is:
A. Neptune
B. Jupiter
C. Mars
D. None of These
CSS - PMS - CCE - PCS - General Science
Stars & Solar System
Which is the hottest planet in our solar system?
A. Venus
B. Neptune
C. Mars
D. None of These
CSS - PMS - CCE - PCS - General Science
Human Health
Which one of the following hormones contains iodine.
A. Thyroxine
B. Testosterone
C. Insulin
D. Adrenaline
CSS - PMS - CCE - PCS - General Science
Light (Optics) - Lenses
Optical fibre works on the principle of
A. Total internal Reflection
B. Refraction
C. Scattering
D. Interference