PPSC Everyday Science Past Paper 2023 Solved MCQs with Answers
Solved Everyday Science MCQs from the PPSC 2023 past paper, each with the correct answer and a clear explanation. Ideal practice for PPSC, FPSC, NTS, CSS and PMS. All questions are extracted from the actual 2023 paper and verified before publication.
Krypton is classified as a:
Krypton is a noble gas, of Group 18.
At room temperature, Krypton is:
Krypton is a colourless, odourless gas at room temperature.
Krypton is commonly used in:
Krypton is used in high performance lighting and in lasers, since it glows brightly when a current passes through it.
Which element symbol stands for Copper?
Copper has the symbol Cu, from the Latin cuprum.
Which element symbol stands for Helium?
Helium has the symbol He.
Diamond and graphite differ because of:
Diamond and graphite are both pure carbon. They differ only in how the atoms are arranged, which is why one is the hardest substance and the other is soft enough to write with.
Which group has 7 valence electrons?
Group 17, the halogens, have 7 electrons in the outer shell, one short of a full octet.
In the modern periodic table, elements are arranged by:
The modern periodic table arranges elements by atomic number. Mendeleev's earlier table used atomic mass.
Tuberculosis is caused by:
Tuberculosis is caused by Mycobacterium tuberculosis.
Cholera is caused by:
Cholera is caused by Vibrio cholerae, spread through contaminated water.
Plague is caused by:
Plague is caused by Yersinia pestis.
Tetanus is caused by:
Tetanus is caused by Clostridium tetani, whose spores live in soil.
Diphtheria is caused by:
Diphtheria is caused by Corynebacterium diphtheriae.
Anthrax is caused by:
Anthrax is caused by Bacillus anthracis.
Syphilis is caused by:
Syphilis is caused by the spirochaete Treponema pallidum.
Leprosy is caused by:
Leprosy is caused by Mycobacterium leprae, named after Armauer Hansen who identified it.
Whooping cough is caused by:
Whooping cough is caused by Bordetella pertussis.
Typhus is caused by:
Typhus is caused by bacteria of the genus Rickettsia, carried by lice and fleas. It is not the same disease as typhoid.
Gonorrhoea is caused by:
Gonorrhoea is caused by Neisseria gonorrhoeae.
AIDS is caused by:
AIDS is caused by the Human Immunodeficiency Virus.
Dengue fever is caused by:
Dengue fever is caused by the dengue virus, of which there are four serotypes.
Vector of dengue and yellow fever:
The Aedes aegypti mosquito carries both dengue and yellow fever, and bites chiefly by day.
Yellow fever is caused by:
Yellow fever is caused by a virus, spread by mosquitoes.
Rabies virus mainly affects:
Rabies attacks the brain and spinal cord, which is why it is almost always fatal once symptoms appear.
Hepatitis A is mainly transmitted via:
Hepatitis A spreads through contaminated food and water.
Hepatitis B is mainly transmitted via:
Hepatitis B spreads through blood and body fluids, not through food.
Polio virus mainly affects:
Polio virus enters through the intestine and may reach the brain and spinal cord, where it destroys the nerve cells that control movement.
Smallpox is caused by:
Smallpox was caused by the variola virus, and was declared eradicated in 1980.
Chickenpox is caused by:
Chickenpox is caused by the varicella zoster virus, which can later reactivate as shingles.
Measles is caused by:
Measles is caused by the measles virus.
Mumps mainly affects:
Mumps chiefly attacks the salivary glands, causing the swelling below the ears.
German measles is also called:
German measles is rubella, a milder illness than measles but dangerous in early pregnancy.
COVID-19 is caused by:
COVID-19 is caused by SARS-CoV-2.
Athlete's foot is caused by:
Athlete's foot is a fungal infection of the skin between the toes.
Ringworm is caused by:
Ringworm is caused by a fungus, despite its name. No worm is involved.
Onychomycosis affects:
Onychomycosis is a fungal infection of the nails.
Vitamin A deficiency causes:
Vitamin A deficiency causes night blindness, since the eye needs it to make the pigment rhodopsin.
Vitamin B1 deficiency causes:
Vitamin B1, thiamine, deficiency causes beriberi.
Vitamin B3 (Niacin) deficiency causes:
Vitamin B3, niacin, deficiency causes pellagra.
Vitamin C deficiency causes:
Vitamin C deficiency causes scurvy, which is why sailors on long voyages were given citrus fruit.
Vitamin D deficiency causes:
Vitamin D deficiency causes rickets in children, since the bones cannot take up enough calcium.
Vitamin K deficiency causes:
Vitamin K is needed for blood clotting, so a deficiency causes bleeding disorders.
Megaloblastic anaemia is caused by deficiency of:
Megaloblastic anaemia follows a deficiency of vitamin B9, folate, or B12.
BCG vaccine protects against:
The BCG vaccine protects against tuberculosis.
MMR vaccine protects against:
MMR protects against measles, mumps and rubella.
DTaP vaccine protects against:
DTaP protects against diphtheria, tetanus and pertussis.
OPV is a vaccine for:
OPV is the oral polio vaccine, developed by Albert Sabin.
Hepatitis B vaccine is a:
The hepatitis B vaccine is a recombinant subunit vaccine, made from a surface protein of the virus rather than the virus itself.
Tetanus vaccine is a:
The tetanus vaccine is a toxoid, an inactivated form of the toxin, since it is the toxin and not the bacterium that does the harm.
Diphtheria vaccine is a:
The diphtheria vaccine is likewise a toxoid.
About the PPSC Everyday Science Past Paper 2023
Every MCQ above is taken from the Punjab Public Service Commission (PPSC) Everyday Science papers held in 2023, with the correct answer and a written explanation for each. Past-paper practice is the most dependable way to prepare for PPSC, FPSC, NTS, CSS and PMS, because these papers repeat their themes, and often the questions themselves, from one year to the next.
Questions were checked against reliable sources before publication. Where a circulating source sheet carried a factual or wording error, we corrected it rather than reproducing the mistake. For chapter-wise preparation, work through our Everyday Science MCQs hub, which also lists every other year’s paper. Further reading: Pakistan Movement and the PPSC official website.
How to Use This Paper
Attempt the full quiz before looking at any answer, then read the explanation for every question you got wrong, including those you guessed correctly. A past paper is only useful if you close the gaps it exposes. Pro members can download the complete paper as a PDF with all answers and explanations for offline revision.