Integrated Science Objective Test (60 Questions) Choose the correct answer from the options A – D. Which colour of light is deviated most during dispersion? A. Red B. Yellow C. Violet D. Green Which of the following is a sex-linked trait? A. Baldness B. Height C. Blood group D. Skin texture An abiotic factor in an ecosystem is A. grazing B. predation C. altitude D. shading Alkanoic acids contain only A. carbon and hydrogen B. hydrogen and oxygen C. carbon, hydrogen and oxygen D. oxygen and nitrogen Which nutrient is needed by plants in very small quantities? A. Calcium B. Iron C. Nitrogen D. Phosphorus A rigid bar that turns about a fixed point is called a A. lever B. pulley C. wheel D. screw Domestic rabbits are commonly classified according to A. colour B. habitat C. fur texture D. size Which substance is highly poisonous? A. Potassium cyanide B. Sodium chloride C. Calcium carbonate D. Copper sulphate Genes are made up of A. RNA B. proteins C. fats D. DNA Brass is mainly an alloy of copper and A. iron B. lead C. aluminium D. zinc Rainfall is an example of A. evaporation B. condensation C. precipitation D. transpiration The centre of gravity of a body is the point where A. friction acts B. all its mass appears concentrated C. motion begins D. energy is produced Which of these is a root vegetable? A. Carrot B. Onion C. Ginger D. Potato Food substances in plants are transported through the A. xylem B. phloem C. cortex D. epidermis Ionic compounds conduct electricity when they are A. solid B. molten C. dry D. frozen Sedimentary rocks are usually A. stratified B. crystalline C. volcanic D. metallic Which blood vessel contains valves? A. Artery B. Vein C. Capillary D. Aorta The most suitable instrument for measuring the thickness of a razor blade is the A. metre rule B. micrometer screw gauge C. tape measure D. vernier calipers Which substance is highly inflammable? A. Ethanol B. Mercury C. Water D. Sodium chloride The embryonic shoot in a seed is called the A. radicle B. cotyledon C. plumule D. testa Mechanical advantage is calculated as A. Load ÷ Effort B. Effort ÷ Load C. Distance × Force D. Power ÷ Work A neutralization reaction produces A. salt and water B. acid and salt C. gas only D. water only The best method of harvesting ripe pepper fruits is A. uprooting B. handpicking C. shaking D. cutting stems Pressure is defined as A. force × area B. force ÷ area C. mass × velocity D. work ÷ time Which substance is acidic? A. Lemon juice B. Wood ash C. Milk of magnesia D. Soap solution In a food chain, the first consumer is the A. primary consumer B. producer C. decomposer D. predator The least amount of energy in a food chain is found in the A. producer B. herbivore C. primary consumer D. top predator Which parasite commonly affects livestock? A. Mosquito B. Tick C. Butterfly D. Housefly The resistance overcome by a machine is known as the A. effort B. pivot C. load D. axle One mole of KHSO₄ has a mass of A. 98 g B. 100 g C. 120 g D. 136 g One function of the skeleton is to A. digest food B. store minerals C. transport oxygen D. produce hormones Seedlings are best transplanted during A. noon B. sunrise C. afternoon D. sunset A rainbow is formed mainly due to A. dispersion B. reflection C. diffraction D. interference Which element is a metalloid? A. Iron B. Copper C. Sulphur D. Silicon Animal cells differ from plant cells because they A. contain chloroplasts B. have cellulose walls C. lack chloroplasts D. contain starch grains Trimming the sides of a nursery bed helps in A. irrigation B. aeration C. preventing breaking of bed D. increasing pests Railway tracks expand due to A. gravity B. pressure C. temperature increase D. magnetism The molarity of a solution is measured in A. mol/dm³ B. g/cm³ C. kg/m² D. N/m A ball and socket joint allows A. gliding movement B. rotational movement C. fixed movement D. hinge movement Rotational grazing helps to control A. endoparasites B. weeds C. erosion D. drought According to Ohm’s law, current equals A. V × R B. V ÷ R C. R ÷ V D. P × T Which compound belongs to the alkyne family? A. C₂H₂ B. C₂H₆ C. CH₄ D. C₃H₈ Which organism is multicellular? A. Amoeba B. Euglena C. Paramecium D. Rhizopus Loamy soil is suitable for crops because it A. drains completely B. contains only sand C. is too compact D. supports plant growth well For accurate temperature reading, the thermometer bulb should be A. above the liquid B. touching the container C. fully immersed D. half immersed Excess alkali in soap can cause A. sweetness B. itching C. softness D. hardness The ozone layer protects the earth from A. infrared rays B. radio waves C. visible light D. ultraviolet rays A fertile soil is one that A. contains insects B. is dark in colour C. has much clay D. supports good crop yield A student standing on a building possesses A. kinetic energy B. heat energy C. electrical energy D. potential energy Anhydrous cobalt (II) chloride paper turns ____ in the presence of water. A. blue B. red C. green D. yellow Photosynthesis takes place mainly in the A. root B. chloroplast C. nucleus D. vacuole The process by which plants lose water vapour is called A. respiration B. excretion C. transpiration D. condensation Which gas is most abundant in the atmosphere? A. Oxygen B. Carbon dioxide C. Nitrogen D. Hydrogen The unit of force is A. joule B. watt C. pascal D. newton The boiling point of pure water at standard pressure is A. 50°C B. 75°C C. 100°C D. 150°C Which organ pumps blood around the body? A. Kidney B. Lung C. Heart D. Liver The basic unit of life is the A. tissue B. organ C. cell D. system Which vitamin helps in blood clotting? A. Vitamin A B. Vitamin C C. Vitamin D D. Vitamin K The force that pulls objects towards the earth is A. friction B. magnetism C. gravity D. tension Which instrument is used to measure atmospheric pressure? A. Thermometer B. Barometer C. Hygrometer D. Ammeter Answer Key C A C C B A D A D D C B A B B A B B A C A A B B A A D B C D B D A D C C C A B A B A D D C B D D D B B C C D C C C D C B https://whatsapp.com/channel/0029Vb7l3jYBA1f3DanlIX2Z

Here's a verification of the provided answer key: 1. Question: Which colour of light is deviated most during dispersion? Provided Answer: C. Violet Verification: ✅ Correct. Violet light has the shortest wavelength and is refracted the most when dispersed. 2. Question: Which of the following is a sex-linked trait? Provided Answer: A. Baldness Verification: ✅ Correct. Male-pattern baldness is a common example of a sex-influenced trait, often discussed in the context of sex-linked inheritance. 3. Question: An abiotic factor in an ecosystem is Provided Answer: C. altitude Verification: ✅ Correct. Abiotic factors are non-living components