Maharashtra SSC (Class 10) Metallurgy — practice questions
45 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Maharashtra SSC (Class 10) Metallurgy in the app →Which metal exists in the liquid state at ordinary room temperature?Which metal has the highest melting point among all metals?Which nonmetal exists in the liquid state at room temperature?Which allotrope of carbon is a good conductor of electricity, unlike other nonmetals?Why are metals classified as electropositive elements?Sodium metal is stored under kerosene mainly to prevent which event?When sodium oxide reacts with water, what type of product is formed?Which gas is liberated when sodium reacts rapidly and vigorously with water?Why does calcium float on water during its reaction with cold water?Aluminium, iron and zinc do not react with cold or hot water but react with which substance?Which sequence correctly shows decreasing reactivity of these metals with dilute acids?Aqua regia is prepared by mixing concentrated hydrochloric acid and concentrated nitric acid in which ratio?When an iron nail is dipped in copper sulphate solution, iron displaces copper. What does this show?Why do noble gases like helium, neon and argon not take part in chemical reactions?Nonmetals are called electronegative elements because they react by doing what?Carbon undergoes partial combustion with oxygen to form which neutral oxide?Why can ionic compounds conduct electricity in the molten state but not in the solid state?Why do ionic compounds generally have high melting and boiling points?Which compound from the chapter's table has the highest melting point?Most reactive metals do not occur free in nature but are found mainly in which form?Minerals from which a metal can be separated economically are specifically called what?The impurities such as soil, sand and rocky matter present along with the ore are called what?The Wilfley table and hydraulic separation methods of concentration are both based on which principle?The froth floatation method of concentration is most suitable for which type of ore?In the leaching concentration of bauxite, the ore is soaked in which kind of solution?Highly reactive metals such as sodium, calcium and magnesium are extracted by which method?During electrolysis of molten sodium chloride, what happens at the cathode?Cryolite and fluorspar are added during electrolytic reduction of alumina chiefly to do what?During electrolytic reduction of alumina, why do the carbon anodes need to be replaced periodically?Strongly heating a sulphide ore in air to convert it into the oxide is called what?Strongly heating a carbonate ore in a limited supply of air to convert it into the oxide is called what?In the thermit reaction Fe2O3 + 2Al gives 2Fe + Al2O3, which species is oxidised?Less reactive metals like gold, silver and platinum are found in nature mainly in which state?Which method is used to obtain pure metals from the impure metals got after reduction?The reddish substance Fe2O3.H2O that deposits on iron exposed to moist air is known as what?Why do silver articles turn blackish after long exposure to air?The greenish layer that forms on a copper vessel kept in moist air is mainly which compound?Why can a layer of paint not protect an iron article from rusting permanently?In galvanizing, a thin layer of which metal is applied to protect iron or steel?In galvanizing, why does the zinc layer corrode before the iron beneath it?Depositing a layer of molten tin on a metal surface, popularly called 'kalhaee', is known as what?In anodization of aluminium, the article is made the anode so that a protective layer of what forms?In electroplating, what is coated onto a more reactive metal by electrolysis?An alloy in which one of the constituent metals is mercury is given which special name?Bronze, an alloy resistant to sun and rain, is made from which composition?