Karnataka SSLC (Class 10) Metals and Non-metals — practice questions
23 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Karnataka SSLC (Class 10) Metals and Non-metals in the app →The property by which metals can be beaten into thin sheets is calledWhich metal exists as a liquid at room temperature?Which non-metal is a good conductor of electricity?Metals generally react with oxygen to form oxides that areSodium metal is stored under kerosene oil because itWhich of these is the most ductile metal?When a metal reacts with a dilute acid, the gas usually evolved isAn oxide that reacts with BOTH acids and bases to give a salt and water is calledWhich pair of metals reacts violently even with cold water?Iron, aluminium and zinc do not react with cold or hot water, but they do react withIn the reactivity (activity) series, which of these metals is the MOST reactive?A more reactive metal placed in the salt solution of a less reactive metal willThe freshly prepared mixture of concentrated HCl and concentrated HNO₃ in a 3:1 ratio, able to dissolve gold, Roasting differs from calcination in that roasting is the heating of an oreMetals high in the activity series (Na, Ca, Mg, Al) are extracted from their molten compounds byThe reaction Fe₂O₃ + 2Al → 2Fe + Al₂O₃ + heat, used to join railway tracks, is known as theIn the electrolytic refining of copper, the anode and the cathode are respectivelyIn the experiment on rusting, iron nails rust only in the test tube where the nails are exposed toBrass is an alloy ofFood cans are coated with tin rather than zinc becauseAn element reacts with oxygen to give an oxide with a high melting point that is also soluble in water. The elWhy do ionic compounds such as NaCl conduct electricity in the molten state but not when solid?Galvanisation protects iron and steel from rusting by coating them with a thin layer of