Junior Science Olympiad NTSE Science — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Junior Science Olympiad NTSE Science in the app →Carbon forms four bonds because it has four valence electrons. Carbon is therefore:A bond formed when two atoms share a pair of electrons is called a:Covalent compounds conduct electricity poorly because they form no:Diamond and graphite are both made only of carbon, so they are:In graphite, each carbon atom is bonded to how many other carbon atoms?The ability of carbon to form long chains with itself is called:A compound whose carbon atoms are joined only by single bonds is called:Compared with saturated carbon compounds, unsaturated ones are generally:Two compounds share one molecular formula but differ in structure. They are:Compounds made only of carbon and hydrogen are called:Saturated hydrocarbons are known as:Hydrocarbons containing one or more triple bonds are called:The atom or group that decides the chemical properties of a carbon compound is the:A series of compounds differing by one carbon, with the same functional group, is a:Burning a saturated hydrocarbon in plenty of air generally gives a flame that is:Limiting the air supply while burning any hydrocarbon leads to:Alkaline potassium permanganate adds oxygen to ethanol. Such substances are called:Vegetable oils are turned into solid fats by adding hydrogen using a catalyst of:Ethanol is commonly known by the everyday name:Ethanoic acid, used as a preservative in pickles, is commonly called:The reaction of a fat or oil with sodium hydroxide to make soap is called:Soap used in hard water leaves an insoluble substance behind, called: