Topic MCQs · Everyday Science
50 MCQs on Everyday Science — Chemistry & Biology Tricky GK sit in the GK360 bank, collected from 1 solved papers (2026). Below are the top 50 distinct questions — repeats across papers merged into their strongest version — with the correct answer marked, an explanation where the bank carries one, and the source paper named on every card.
Correct Answer: Propane and Butane
Liquefied petroleum gas (LPG) is mainly a mixture of propane and butane.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Glucose and Fructose
Sucrose is a disaccharide made of one glucose molecule and one fructose molecule.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: H₂O
A water molecule has two hydrogen atoms and one oxygen atom: H₂O.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Carbon Dioxide
Plants take in carbon dioxide for photosynthesis and release oxygen as a by-product.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Skin
The skin is the body's largest organ, covering about 2 square metres in an adult.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Mitochondria
Mitochondria generate most of the cell's energy as ATP, hence the powerhouse label.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Gene
A gene is the unit of heredity: a segment of DNA that carries the instructions for a trait.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Methane
Natural gas consists mostly of methane, with smaller amounts of ethane and other hydrocarbons.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: 7
Pure water is neutral, with pH 7 at 25°C.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Mercury
Mercury is the only metal that is liquid at ordinary room temperature.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Vitamin D
Sunlight on the skin triggers the synthesis of vitamin D, the sunshine vitamin.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Sodium Chloride
Common table salt is sodium chloride, NaCl.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Fermentation
Yeast fermentation converts sugars into ethanol (alcohol) and carbon dioxide.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Oxygen
Iron rusts when it reacts with oxygen in the presence of water, forming iron oxides.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Atom
The atom is the smallest unit of matter that retains the chemical properties of an element.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Femur
The femur, the thigh bone, is the longest and strongest bone in the human body.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Water
Water is called the universal solvent because it dissolves more substances than any other liquid.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Hemoglobin
Haemoglobin, the iron-containing pigment in red blood cells, carries oxygen and gives blood its red colour.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: NH₃
An ammonia molecule has one nitrogen atom and three hydrogen atoms: NH₃.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Kidney
The kidneys filter the blood, removing waste and excess water as urine.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Carbohydrates
Carbohydrates, broken down to glucose, are the body's primary energy source.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Argon
Electric bulbs are commonly filled with argon, an inert gas that protects the filament.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: 100°C
Water boils at 100°C at standard atmospheric pressure.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Chlorophyll
Chlorophyll, in the chloroplasts, is the green pigment that captures light for photosynthesis.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Entomology
Entomology is the branch of zoology that studies insects.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Au
Gold's symbol Au comes from its Latin name, aurum.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Nephron
The nephron is the kidney's filtering unit, producing urine from the blood.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Acetic Acid
Vinegar is a dilute solution of acetic acid (about 5%) in water.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Heart
The heart pumps blood through the arteries, veins and capillaries of the body.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: CO₂
A carbon dioxide molecule has one carbon atom and two oxygen atoms: CO₂.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Tooth Enamel
Tooth enamel, the outer covering of the teeth, is harder than bone.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Carbon Dioxide
Carbon dioxide smothers a fire by displacing oxygen around the flames.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Red Blood Cell
Mature mammalian red blood cells have no nucleus, leaving more room for haemoglobin.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Sodium Bicarbonate
Baking soda is sodium bicarbonate, also called sodium hydrogen carbonate (NaHCO₃).
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Liver
The liver is the largest gland in the human body and also the largest internal organ.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Zinc
Galvanization coats iron or steel with zinc to protect it from rusting.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Stapes
The stapes, one of the three middle-ear bones, is the smallest bone in the body.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Transport Oxygen
Red blood cells carry oxygen from the lungs to the tissues via haemoglobin.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: CH₄
A methane molecule has one carbon atom and four hydrogen atoms: CH₄.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Botany
Botany is the branch of biology devoted to the study of plants.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Enzyme
Enzymes are biological catalysts: they speed up chemical reactions without being used up.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Amino Acids
Proteins are built from amino acids, and pulses supply protein in the form of its amino-acid building blocks.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Vitamin K
Vitamin K is required to make the blood-clotting factors in the liver.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Fe
Iron's symbol Fe comes from its Latin name, ferrum.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Ear
The organs of balance sit in the inner ear and sense head movement and position.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Methane
Biogas is mostly methane (roughly 50–75%), with carbon dioxide as the second component.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Ampere
The ampere is the SI unit of electric current.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Nucleus
The nucleus holds the cell's DNA and directs its activities.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Calcium Hypochlorite
Bleaching powder is calcium hypochlorite, Ca(OCl)₂.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
Correct Answer: Anatomy
Anatomy is the study of the structure of the human body.
From: Chemistry & Biology Tricky GK — Practice Set (2026) · PMS
The bank holds 50 questions tagged "Everyday Science — Chemistry & Biology Tricky GK" under Everyday Science, drawn from 1 solved papers (2026). After merging the same question asked in multiple papers, 50 are distinct; this page shows the top 50.
They are pulled from the solved papers in the GK360 archive — PMS papers among them — and every card on this page names its source paper and year, so you can open the full paper from the Past Papers archive.
Yes — 50 of the 50 questions shown carry a written explanation under the answer; the rest show the verified correct answer for revision. Every answer passed GK360's three-way check (printed key, worked material, standard fact).
Work through the questions on this page first, note the ones you miss, then attempt the same topic under a timer with the "Practice this topic" button above — it starts a timed Quiz Builder attempt on this exact subject and topic right away.
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