PPSC Everyday Science Past Paper 2019 Solved MCQs with Answers
Solved Everyday Science MCQs from the PPSC 2019 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 2019 paper and verified before publication.
Hot-air balloon was invented by:
The Montgolfier brothers flew the first hot air balloon in 1783.
Zeppelin (rigid airship) by:
Count Ferdinand von Zeppelin built the first rigid airship in 1900.
Bifocal lens was invented by:
Benjamin Franklin invented bifocal lenses, so that he need not change spectacles to read.
Lightning conductor was invented by:
Benjamin Franklin invented the lightning conductor, after his kite experiment of 1752.
Sewing machine (lockstitch) by:
Elias Howe patented the lockstitch sewing machine in 1846.
Domestic sewing machine was patented by:
Isaac Singer patented the practical domestic sewing machine and built the industry around it.
Cotton gin was invented by:
Eli Whitney invented the cotton gin in 1793, which separated the fibre from the seed mechanically.
Spinning jenny by:
James Hargreaves invented the spinning jenny in 1764.
Power loom was invented by:
Edmund Cartwright invented the power loom in 1785.
Camera (Kodak) was invented by:
George Eastman founded Kodak and produced the first roll film camera for ordinary users.
Phonograph was invented by:
Thomas Edison invented the phonograph in 1877, the first machine to record and replay sound.
Pasteurisation process was developed by:
Louis Pasteur developed pasteurisation, heating liquids just enough to kill the microbes without spoiling the taste.
Vaccination was developed by:
Edward Jenner developed vaccination in 1796, using cowpox to protect against smallpox.
Penicillin was discovered by:
Alexander Fleming discovered penicillin in 1928, when mould contaminated a culture plate.
X-rays were discovered by:
Wilhelm Rontgen discovered X-rays in 1895, and took the first Nobel Prize in physics for it.
Radioactivity was discovered by:
Henri Becquerel discovered radioactivity in 1896, from uranium salts fogging a photographic plate.
Electron was discovered by:
J.J. Thomson discovered the electron in 1897.
Proton was discovered by:
Ernest Rutherford identified the proton in 1919.
Neutron was discovered by:
James Chadwick discovered the neutron in 1932.
Positron was discovered by:
Carl David Anderson found the positron in 1932, in cosmic ray tracks. Dirac had predicted it.
Gamma rays were discovered by:
Paul Villard discovered gamma rays in 1900.
Atomic numbers were established by:
Henry Moseley established the atomic number in 1913, and so put the periodic table on a firm basis.
Cell was discovered by:
Robert Hooke saw and named cells in 1665, in a slice of cork.
Blood circulation was discovered by:
William Harvey described the circulation of the blood in 1628.
Blood groups were discovered by:
Karl Landsteiner discovered the ABO blood groups in 1901, which made safe transfusion possible.
DNA structure (double helix) by:
James Watson and Francis Crick published the double helix structure of DNA in 1953, working from Rosalind Franklin's X-ray images.
Discoverer of nucleic acid (DNA) in 1869:
Friedrich Miescher isolated nucleic acid in 1869, long before its role was understood.
Aspirin was first synthesized for medical use by:
Felix Hoffmann synthesised stable aspirin at Bayer in 1897.
Insulin was discovered by:
Frederick Banting and Charles Best isolated insulin in 1921, which turned diabetes from a fatal disease into a manageable one.
Electromagnetism (connection between electricity and magnetism) was discovered by:
Hans Christian Orsted found in 1820 that a current deflects a compass needle, the first link between electricity and magnetism.
Electromagnet was invented by:
William Sturgeon built the first electromagnet in 1825.
Transistor (1947) was invented by:
Shockley, Bardeen and Brattain invented the transistor at Bell Labs in 1947.
First general-purpose electronic digital computer (ENIAC) was developed by:
ENIAC was built by J. Presper Eckert and John Mauchly at the University of Pennsylvania in 1945.
Floppy disk was developed by a team led by:
The floppy disk was developed at IBM by a team under Alan Shugart.
Fibre optics was pioneered and developed by:
Narinder Singh Kapany pioneered fibre optics and gave the field its name.
First self-sustaining nuclear chain reaction (and thus the first nuclear reactor) was achieved by a team led by:
Enrico Fermi's team achieved the first self sustaining chain reaction in Chicago in 1942.
Implantable cardiac pacemaker was invented by:
Wilson Greatbatch invented the implantable pacemaker in 1958, after wiring a circuit with the wrong resistor.
Artificial heart (Jarvik-7) was developed by:
Robert Jarvik designed the Jarvik-7 artificial heart, first implanted in 1982.
Kidney dialysis machine by:
Willem Kolff built the first working kidney dialysis machine in 1943.
Which of the following is the best conductor of electricity?
Silver is the best conductor of electricity, followed by copper. Copper is used in wiring because it costs far less.
Which is the lightest (least dense) metal?
Lithium is the lightest metal, and floats on water.
Chief ore of aluminium is:
Bauxite is the chief ore of aluminium.
Element present in largest amount in rocks & minerals:
Silicon is the most abundant element in rocks and minerals after oxygen, and of the metals and metalloids listed it is by far the commonest.
Alloy used in heating elements is:
Nichrome, an alloy of nickel and chromium, is used in heating elements because of its high resistance and its resistance to oxidation when hot.
Diamond and graphite are:
Diamond and graphite are allotropes of carbon, the same element in different structures.
Seawater conducts electricity because of:
Seawater conducts electricity because of the dissolved ions, chiefly sodium and chloride, which carry the current.
About the PPSC Everyday Science Past Paper 2019
Every MCQ above is taken from the Punjab Public Service Commission (PPSC) Everyday Science papers held in 2019, 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.