PPSC Everyday Science Past Paper 2024 Solved MCQs with Answers
Solved Everyday Science MCQs from the PPSC 2024 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 2024 paper and verified before publication.
Photosynthesis is a/an:
Photosynthesis absorbs energy from sunlight, so it is endothermic.
Combustion typically produces:
Combustion is the rapid reaction with oxygen that gives out both heat and light.
Dalton's theory states that the smallest particle of matter is the:
Dalton held that the atom is the smallest particle of matter, and cannot be divided.
Which scientist's gold-foil experiment revealed the atomic nucleus?
Rutherford's gold foil experiment showed that most alpha particles passed straight through, but a few bounced back, which revealed a small dense nucleus.
An atom is electrically neutral because:
An atom is neutral because it has equal numbers of protons and electrons.
Which radiation is primarily used in cancer radiotherapy?
Gamma radiation is used in radiotherapy, since it penetrates deeply enough to reach a tumour inside the body.
The mass of an atom is mostly concentrated in its:
Almost all the mass of an atom lies in its nucleus. The electrons contribute very little.
How many main types of chemical bonds are typically identified?
Three main types of chemical bond are identified: ionic, covalent and metallic.
In an ionic bond, electrons are:
In an ionic bond electrons are transferred from one atom to another, leaving oppositely charged ions that attract.
The H₂O molecule contains which type of bond?
Water has polar covalent bonds, since oxygen pulls the shared electrons more strongly than hydrogen.
NaCl (Sodium Chloride) is an example of a compound with a/an:
Sodium chloride is ionic, sodium giving up an electron to chlorine.
In a covalent bond, electrons are:
In a covalent bond the atoms share electrons rather than transferring them.
An HCl molecule has which type of bond?
HCl has a polar covalent bond, chlorine drawing the shared pair towards itself.
Which bond forms between two identical non-metal atoms?
Two identical non-metal atoms share electrons equally, giving a non-polar covalent bond.
MgO (Magnesium Oxide) is held together by which type of bond?
Magnesium oxide is ionic, magnesium giving two electrons to oxygen.
Which is the hardest natural substance?
Diamond is the hardest natural substance, its carbon atoms locked in a rigid three dimensional lattice.
Which allotrope of carbon conducts electricity?
Graphite conducts electricity, since each carbon atom leaves one electron free to move between the layers.
Coke is primarily obtained from:
Coke is made by heating coal in the absence of air.
Charcoal is mainly produced from:
Charcoal is made by heating wood without air.
All allotropes of carbon are made of:
Diamond, graphite and charcoal are all allotropes, that is different forms of pure carbon.
How many confirmed elements are in the modern periodic table?
The modern periodic table has 118 confirmed elements.
The symbol of Gold is:
Gold has the symbol Au, from the Latin aurum.
The symbol of Silver is:
Silver has the symbol Ag, from the Latin argentum.
The symbol of Mercury is:
Mercury has the symbol Hg, from hydrargyrum, meaning liquid silver.
The symbol of Lead is:
Lead has the symbol Pb, from the Latin plumbum.
The symbol of Sodium is:
Sodium has the symbol Na, from natrium.
The symbol of Potassium is:
Potassium has the symbol K, from kalium.
The symbol of Iron is:
Iron has the symbol Fe, from the Latin ferrum.
The symbol of Tin is:
Tin has the symbol Sn, from the Latin stannum.
The symbol of Tungsten is:
Tungsten has the symbol W, from wolfram.
The symbol of Antimony is:
Antimony has the symbol Sb, from stibium.
Atomic number of Hydrogen is:
Hydrogen has atomic number 1, a single proton.
Atomic number of Carbon is:
Carbon has atomic number 6.
Atomic number of Oxygen is:
Oxygen has atomic number 8.
Atomic number of Krypton is:
Krypton has atomic number 36.
Atomic number of Uranium is:
Uranium has atomic number 92, the heaviest element occurring in nature in any quantity.
Element 118 is:
Element 118 is oganesson, named after the physicist Yuri Oganessian.
Noble gases belong to which group?
The noble gases form Group 18, and are unreactive because their outer shells are full.
Which of these is NOT a noble gas?
Chlorine is a halogen, not a noble gas.
Alkali metals belong to:
The alkali metals form Group 1, each with a single electron in its outer shell.
Calcium and Magnesium are:
Calcium and magnesium are alkaline earth metals, of Group 2.
Halogens belong to:
The halogens form Group 17: fluorine, chlorine, bromine, iodine and astatine.
Lanthanides span atomic numbers:
The lanthanides run from atomic number 57, lanthanum, to 71, lutetium.
Actinides span atomic numbers:
The actinides run from 89, actinium, to 103, lawrencium.
Iron, Copper and Zinc are examples of:
Iron, copper and zinc are transition metals, from the middle block of the periodic table.
Which is the lightest element?
Hydrogen is the lightest element, with one proton and one electron.
Most abundant element in the universe is:
Hydrogen is the most abundant element in the universe, making up about three quarters of its ordinary matter.
Most abundant element in Earth's crust is:
Oxygen is the most abundant element in the earth's crust, at about 46 per cent by mass, mostly locked in silicate minerals.
Most abundant gas in the atmosphere is:
Nitrogen makes up about 78 per cent of the atmosphere. Oxygen is about 21 per cent.
Krypton's symbol is:
Krypton has the symbol Kr.
About the PPSC Everyday Science Past Paper 2024
Every MCQ above is taken from the Punjab Public Service Commission (PPSC) Everyday Science papers held in 2024, 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.
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