Chemistry mcq questions and answers for competitive examsRamya_naidu Posted on Jun 9, 2022 10:12 PM Chemistry mcq questions and answers for competitive exams UPSC SSC , SSC CGL, SSC CHSL, upsc Civils , Entrance exams Online test practice online free Quiz, mock practice online1.Alloys made with mercury as one metal are called? asoldersbmixturescamalgamsdemulsions View Answer Discuss2.The number of electrons presents in H+ is a0b1c2d3 View Answer Discuss3.The hardest form of carbon is acokebgraphiteccharcoalddiamond View Answer Discuss4.pH of water is a5b6c7d8 View Answer Discuss5.Natural rubber is a polymer derived from? aisoprenebethylenecpropylenedbutadiene View Answer Discuss6.The octane number of zero is assigned to an-heptanebiso-octanec2-methyl octaned3-methyl octane View Answer Discuss7.=The National Chemical Laboratory is situated in aPunebPatnacNew DelhidBangalore View Answer Discuss8.The isotope atoms differ in? aatomic weightbatomic numbercnumber of electronsdnumber of neutrons View Answer Discuss9.What is metallurgy? aprocess of making metals live longbprocess of creating alloys of metalscprocess of extracting metal in pure form from its oredNone of above View Answer Discuss10.Elements that show the properties of both metals and non metals are called? aalloysbcolloidscallotropesdmetalloids View Answer Discuss11.The most commonly used bleaching agent is aalcoholbchlorineccarbon dioxidedsodium chlorine View Answer Discuss12.What is the hardest form of carbon? acokebgraphiteccharcoalddiamond View Answer Discuss13.Conduction band electrons have more mobility than holes because they are ahave negative chargebneed less energy to move themcexperience collision less frequentlydexperience collision more frequently View Answer Discuss14.Atomic number of an element gives athe number of nucleons in its atombthe number of electrons in its atomcthe weight of the atom of the elementdthe total number of elementary particles in its atom View Answer Discuss15.Why is phosphorus kept under water? ato make it wetbto make it durablecwater forms a protective coating on itdto save it from catching fire when exposed to dry air View Answer Discussprevious12345nextRate This:NaN / 5 - 1 votesAdd comment