Free Chemistry in Daily Life MCQs with Answers
305 Chemistry in Daily Life MCQs from Everyday Science, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Chemical principles appear in acids, bases, salts, solutions, oxidation, combustion, corrosion and neutralisation, along with the composition and uses of common substances. Coverage includes soaps and detergents, fertilizers, medicines, food preservatives, polymers, fuels and water treatment, while distinguishing physical changes from chemical reactions.
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305 questions · page 1 of 16
- A. Sodium bicarbonate
- B. Sodium chloride
- C. Calcium carbonate
- D. Potassium chloride
Explanation: Table salt is sodium chloride, NaCl. Sodium bicarbonate (NaHCO₃) is baking soda and calcium carbonate (CaCO₃) is limestone — both common…
Correct answer: Sodium chloride- A. Cooling process
- B. Exothermic process
- C. Bottom process
- D. Rare processEveryday Science MCQs
Explanation: Evaporation causes cooling because the fastest, highest-energy molecules escape from the liquid surface, leaving lower-energy molecules…
Correct answer: Cooling process- A. Argon
- B. Neon
- C. Krypton
- D. Xenon
Explanation: Neon signs traditionally use low-pressure neon gas, which glows reddish-orange when electrically excited.
Correct answer: Neon- A. Goldstein
- B. James Chadwick
- C. J J Thomson
- D. Rutherford
Explanation: Rutherford’s gold-foil experiment showed that nearly all the atom’s positive charge and mass are concentrated in a tiny central nucleus.
Correct answer: Rutherford- A. 16amu
- B. 17amu
- C. 18amu
- D. 20amu
Explanation: A water molecule contains two hydrogen atoms and one oxygen atom, so its molecular mass is 2(1) + 16 = 18 atomic mass units.
Correct answer: 18amu- A. Periods
- B. Groups
- C. Rows
- D. Lanthanoids series
Explanation: The vertical columns of the periodic table are called groups, and elements in a group generally have similar valence-electron arrangements…
Correct answer: Groups- A. Beryllium
- B. Magnesium
- C. Aluminium
- D. None of These
Explanation: Magnesium compounds are present in seawater and magnesium metal is commercially obtained from them, commonly by electrolysis of molten…
Correct answer: Magnesium- A. Ductility
- B. Malleability
- C. Conductivity
- D. Density
Explanation: Malleability is the ability of a metal to be hammered or pressed into thin sheets. Ductility is the related ability to be drawn into wires.
Correct answer: Malleability- A. 63% tin and 37% lead
- B. 63% lead and 37% tin
- C. 63% tin and 37% aluminum
- D. 63% lead and 37% aluminum
Explanation: Traditional solder is a low-melting alloy of about 63% tin and 37% lead, allowing it to melt and join components without melting them.
Correct answer: 63% tin and 37% lead- A. Atomic number
- B. Atomic weight
- C. Number of orbitals
- D. none
Explanation: The atomic number equals the number of protons, and a neutral atom has equal numbers of protons and electrons.
Correct answer: Atomic number- A. Nitrogen
- B. Phosphorus
- C. Sulphur
- D. none
Explanation: Sulphur is a secondary plant nutrient, along with calcium and magnesium.
Correct answer: Sulphur- A. Three
- B. Two
- C. Four
- D. None
Explanation: The standard model of an atom identifies three main subatomic particles: protons, neutrons and electrons.
Correct answer: Three- A. Amino acids
- B. Nucleic acids
- C. Carbohydrates
- D. None
Explanation: Phosphorus is part of the phosphate backbone of DNA and RNA, making it essential to nucleic acids.
Correct answer: Nucleic acids- A. Different atomic number but same atomic weight
- B. Different atomic number and different atomic weight
- C. Same atomic number and different atomic weight
- D. None
Explanation: Isotopes have the same atomic number because they contain the same number of protons, but different atomic masses because their neutron…
Correct answer: Same atomic number and different atomic weight- A. Silicon Dioxide
- B. Stannous Oxide
- C. Aluminium Oxide
- D. None
Explanation: Quartz is crystalline silicon dioxide, written chemically as SiO₂. The other oxides listed are different compounds and do not form…
Correct answer: Silicon Dioxide- A. Lactometer
- B. Hygrometer
- C. Manometer
- D. Sonometer
Explanation: A lactometer measures the density or specific gravity of milk, helping detect dilution or some forms of adulteration.
Correct answer: Lactometer- A. 0°C
- B. 4°C
- C. 4° K
- D. 4.8°C
Explanation: Water reaches its greatest density at 4°C because hydrogen bonding and molecular spacing produce an unusual expansion below that…
Correct answer: 4°C- A. Electroplating
- B. Annealing
- C. Galvanization
- D. Vulcanization
Explanation: Galvanization is the coating of iron or steel with zinc. Zinc forms a protective layer and also corrodes preferentially, helping shield…
Correct answer: Galvanization- A. Honey
- B. Water
- C. Milk
- D. olive oil
- E. None of these
Explanation: A lactometer measures the specific gravity of milk, helping detect dilution or abnormal composition.
Correct answer: Milk- A. Zn + Ni
- B. Cu + Zn
- C. Cu + Ni
- D. Cu + Sn
- E. None of these
Explanation: German silver is principally an alloy of copper, nickel and zinc, and it contains no silver.
Correct answer: Cu + NiChemistry in Daily Life MCQs: common questions
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There are 305 Chemistry in Daily Life MCQs in the Everyday Science bank, shown 20 to a page with the correct answer and an explanation on each.
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