CSS - PMS - CCE - PCS - General Science Practice

CSS - PMS - CCE - PCS - General Science MCQs

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CSS - PMS - CCE - PCS - General Science

CSS - PMS - CCE - PCS - General Science MCQs With Answers

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CSS - PMS - CCE - PCS - General Science COP
COP30 was hosted in which Brazilian city?
A. Rio de Janeiro
B. São Paulo
C. Belém
D. Brasília
Read Theory
Correct Answer: C
C: Correct because COP30 was held in Belém, Brazil, in the Amazon region. A: Wrong because Rio is a major Brazilian city but was not COP30 host. B: Wrong because São Paulo was not the COP30 host city. D: Wrong because Brasília is the capital but not the COP30 venue.
CSS - PMS - CCE - PCS - General Science Human Body System
The basic unit of life is:
A. Atom
B. Cell
C. Tissue
D. Organ
Read Theory
Correct Answer: B
B: Correct because the cell is the structural and functional unit of living organisms. A: Wrong because an atom is a unit of matter, not life. C: Wrong because tissues are groups of cells. D: Wrong because organs are made of tissues.
CSS - PMS - CCE - PCS - General Science Earth Structure
Which gas is most abundant in Earth's atmosphere?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Read Theory
Correct Answer: B
B: Correct because nitrogen makes up the largest share of Earth's atmosphere. A: Wrong because oxygen is second-most abundant. C: Wrong because carbon dioxide is present in small concentration. D: Wrong because hydrogen is only a trace gas.
CSS - PMS - CCE - PCS - General Science Chemical Symbols
The chemical formula of water is:
A. CO2
B. H2O
C. O2
D. NaCl
Read Theory
Correct Answer: B
B: Correct because water consists of two hydrogen atoms and one oxygen atom. A: Wrong because CO2 is carbon dioxide. C: Wrong because O2 is oxygen gas. D: Wrong because NaCl is sodium chloride.
CSS - PMS - CCE - PCS - General Science Vitamins
Which vitamin is produced in the skin by sunlight?
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin D
Read Theory
Correct Answer: D
D: Correct because sunlight helps skin synthesize vitamin D. A: Wrong because vitamin A is not mainly produced by sunlight. B: Wrong because B12 is obtained mostly from animal foods or supplements. C: Wrong because vitamin C comes from diet, especially fruits.
CSS - PMS - CCE - PCS - General Science Organs
Which organ purifies blood by filtering waste and producing urine?
A. Heart
B. Liver
C. Kidney
D. Lungs
Read Theory
Correct Answer: C
C: Correct because kidneys filter blood and remove waste through urine. A: Wrong because the heart pumps blood. B: Wrong because the liver performs metabolism and detoxification but does not make urine. D: Wrong because lungs exchange gases.
CSS - PMS - CCE - PCS - General Science Photosynthesis
Photosynthesis mainly occurs in:
A. Mitochondria
B. Chloroplasts
C. Nucleus
D. Ribosomes
Read Theory
Correct Answer: B
B: Correct because chloroplasts contain chlorophyll and carry out photosynthesis. A: Wrong because mitochondria release energy by respiration. C: Wrong because nucleus controls cell activities. D: Wrong because ribosomes synthesize proteins.
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
Read Theory
Correct Answer: B
B: Correct because Mars appears reddish due to iron oxide on its surface. A: Wrong because Venus is not called the Red Planet. C: Wrong because Jupiter is a gas giant. D: Wrong because Mercury is the smallest planet.
CSS - PMS - CCE - PCS - General Science Light (OPtics) - Refraction
The speed of light in vacuum is approximately:
A. 3 x 10^8 m/s
B. 3 x 10^6 m/s
C. 300 m/s
D. 30,000 m/s
Read Theory
Correct Answer: A
A: Correct because light travels at about 3 x 10^8 metres per second in vacuum. B: Wrong because this is 100 times smaller than the accepted value. C: Wrong because 300 m/s is near the speed of sound, not light. D: Wrong because 30,000 m/s is too low for light.
CSS - PMS - CCE - PCS - General Science Blood System
Which blood cells fight infections?
A. Red blood cells
B. White blood cells
C. Platelets
D. Plasma only
Read Theory
Correct Answer: B
B: Correct because white blood cells are part of the immune response. A: Wrong because red cells transport oxygen. C: Wrong because platelets help clotting. D: Wrong because plasma is the fluid part of blood.
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